American States Water (AWR) 10-K22 Feb 222021 FY Annual reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
Document and Entity Information - USD ($) $ in Thousands	Dec. 31, 2021	Feb. 18, 2022	Jun. 30, 2021
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Document Transition Report	false
Entity File Number	001-14431
Entity Registrant Name	American States Water Company
Entity Tax Identification Number	95-4676679
Entity Incorporation, State or Country Code	CA
Entity Address, Address Line One	630 E. Foothill Boulevard,
Entity Address, City or Town	San Dimas
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	91773-1212
City Area Code	(909)
Local Phone Number	394-3600
Title of 12(b) Security	American States Water Company Common Shares
Trading Symbol	AWR
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 2,938,292
Entity Common Stock, Shares Outstanding (in shares)		36,945,434
Documents Incorporated by Reference	Portions of the Proxy Statement of American States Water Company will be subsequently filed with the Securities and Exchange Commission as to Part III, Item Nos. 10, 11, 13 and 14 and portions of Item 12, in each case as specifically referenced herein.
Entity Central Index Key	0001056903
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false
ICFR Auditor Attestation Flag	true
GSWC
Entity Information [Line Items]
Entity File Number	001-12008
Entity Registrant Name	Golden State Water Company
Entity Tax Identification Number	95-1243678
Entity Incorporation, State or Country Code	CA
Entity Address, Address Line One	630 E. Foothill Boulevard,
Entity Address, City or Town	San Dimas
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	91773-1212
City Area Code	(909)
Local Phone Number	394-3600
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Shell Company	false
Entity Public Float			$ 0
Entity Common Stock, Shares Outstanding (in shares)		170
Entity Central Index Key	0000092116
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false
GSWC \| Subsequent Event
Entity Information [Line Items]
Entity Public Float		$ 0

Audit Information

Audit Information	12 Months Ended
Audit Information	Dec. 31, 2021
Audit Information [Abstract]
Auditor Firm ID	238
Auditor Name	PricewaterhouseCoopers LLP
Auditor Location	Los Angeles, California

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Regulated utility plant, at cost
Water	$ 1,898,817	$ 1,784,402
Electric	116,472	112,507
Total	2,015,289	1,896,909
Non-regulated utility property, at cost	37,064	33,315
Total utility plant, at cost	2,052,353	1,930,224
Less — accumulated depreciation	(594,264)	(568,326)
Utility plant before construction work in progress	1,458,089	1,361,898
Construction work in progress	167,915	150,145
Net utility plant	1,626,004	1,512,043
Other Property and Investments
Goodwill	1,116	1,116
Other property and investments	40,806	35,318
Total other property and investments	41,922	36,434
Current Assets
Cash and cash equivalents	4,963	36,737
Accounts receivable — customers, less allowance for doubtful accounts	34,416	29,162
Unbilled revenue — receivable (Note 2)	27,147	25,836
Receivable from U.S. government, less allowance for doubtful accounts (Note 2)	27,827	25,182
Other accounts receivable, less allowance for doubtful accounts	6,510	3,960
Income taxes receivable	236	103
Materials and supplies	12,163	8,619
Regulatory assets — current	8,897	13,088
Prepayments and other current assets	5,317	5,555
Contract assets (Note 2)	6,135	8,873
Unrealized gain on purchased power contracts	4,441	0
Total current assets	138,052	157,115
Regulatory and Other Assets
Unbilled revenue, receivable from U.S government	9,671	9,945
Receivable from U.S. government (Note 2)	51,991	49,488
Contract assets (Note 2)	3,452	1,384
Operating lease right-of-use assets	10,479	11,146
Regulatory assets	3,182	3,451
Other	16,230	10,597
Total other assets	95,005	86,011
Total Assets	1,900,983	1,791,603
Capitalization
Common shareholder’s equity	685,947	641,673
Long-term debt	412,176	440,348
Total capitalization	1,098,123	1,082,021
Current Liabilities
Notes payable to banks	31,000	0
Long-term debt — current	377	358
Accounts payable	65,902	63,788
Income taxes payable	4,662	6,783
Accrued other taxes	17,137	11,902
Accrued employee expenses	16,256	15,122
Accrued interest	4,545	4,832
Unrealized loss on purchased power contracts	0	1,537
Regulatory liabilities	1,896	0
Contract liabilities (Note 2)	257	1,800
Operating lease liabilities	2,044	2,013
Other	11,498	10,437
Total current liabilities	155,574	118,572
Other Credits
Notes payable to banks	174,500	134,200
Advances for construction	66,727	63,374
Contributions in aid of construction — net	147,482	140,332
Deferred income taxes	140,290	131,172
Regulatory liabilities	32,979	0
Unamortized investment tax credits	1,153	1,224
Accrued pension and other post-retirement benefits	61,365	95,639
Operating lease liabilities	8,920	9,636
Other	13,870	15,433
Total other credits	647,286	591,010
Commitments and Contingencies
Liabilities and Equity, Total	$ 1,900,983	$ 1,791,603

CONSOLIDATED STATEMENTS OF CAPI

CONSOLIDATED STATEMENTS OF CAPITALIZATION - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Common Stock, Par or Stated Value Per Share	$ 0	$ 0
Common stock, shares outstanding	36,936,285	36,889,103
Common stock, shares authorized	60,000,000	60,000,000
Common Shareholders' Equity:
Common shares, no par value	$ 258,442	$ 256,666
Reinvested earnings in the business	427,505	385,007
Common shareholder’s equity	685,947	641,673
Long-Term Debt
Debt and Lease Obligation	415,788	444,271
Less: Current maturities	(377)	(358)
Debt Issuance Costs, Net	(3,235)	(3,565)
Long-Term Debt	412,176	440,348
Total Capitalization	$ 1,098,123	$ 1,082,021
GSWC
Common Stock, Par or Stated Value Per Share	$ 0	$ 0
Common stock, shares outstanding	170	170
Common stock, shares authorized	1,000	1,000
Common Shareholders' Equity:
Common shares, no par value	$ 356,530	$ 354,906
Reinvested earnings in the business	259,156	228,392
Common shareholder’s equity	615,686	583,298
Long-Term Debt
Debt and Lease Obligation	415,788	444,271
Less: Current maturities	(377)	(358)
Debt Issuance Costs, Net	(3,235)	(3,565)
Long-Term Debt	412,176	440,348
Total Capitalization	1,027,862	1,023,646
6.81% notes due 2028
Long-Term Debt
Debt and Lease Obligation	$ 15,000	$ 15,000
Interest rate per annum (as a percent)	6.81%	6.81%
6.81% notes due 2028 \| GSWC
Long-Term Debt
Debt and Lease Obligation	$ 15,000	$ 15,000
Interest rate per annum (as a percent)	6.81%	6.81%
6.59% notes due 2029
Long-Term Debt
Debt and Lease Obligation	$ 40,000	$ 40,000
Interest rate per annum (as a percent)	6.59%	6.59%
6.59% notes due 2029 \| GSWC
Long-Term Debt
Debt and Lease Obligation	$ 40,000	$ 40,000
Interest rate per annum (as a percent)	6.59%	6.59%
7.875% notes due 2030
Long-Term Debt
Debt and Lease Obligation	$ 20,000	$ 20,000
Interest rate per annum (as a percent)	7.875%	7.875%
7.875% notes due 2030 \| GSWC
Long-Term Debt
Debt and Lease Obligation	$ 20,000	$ 20,000
Interest rate per annum (as a percent)	7.875%	7.875%
7.23% notes due 2031
Long-Term Debt
Debt and Lease Obligation	$ 50,000	$ 50,000
Interest rate per annum (as a percent)	7.23%	7.23%
7.23% notes due 2031 \| GSWC
Long-Term Debt
Debt and Lease Obligation	$ 50,000	$ 50,000
Interest rate per annum (as a percent)	7.23%	7.23%
6.00% notes due 2041
Long-Term Debt
Debt and Lease Obligation	$ 62,000	$ 62,000
Interest rate per annum (as a percent)	6.00%	6.00%
6.00% notes due 2041 \| GSWC
Long-Term Debt
Debt and Lease Obligation	$ 62,000	$ 62,000
Interest rate per annum (as a percent)	6.00%	6.00%
3.45% notes due 2029
Long-Term Debt
Debt and Lease Obligation	$ 15,000	$ 15,000
Interest rate per annum (as a percent)	3.45%	3.45%
3.45% notes due 2029 \| GSWC
Long-Term Debt
Debt and Lease Obligation	$ 15,000	$ 15,000
Interest rate per annum (as a percent)	3.45%	3.45%
9.56% notes due 2031
Long-Term Debt
Debt and Lease Obligation	$ 0	$ 28,000
Interest rate per annum (as a percent)	9.56%	9.56%
9.56% notes due 2031 \| GSWC
Long-Term Debt
Debt and Lease Obligation	$ 0	$ 28,000
Interest rate per annum (as a percent)	9.56%	9.56%
5.87% notes due 2028
Long-Term Debt
Debt and Lease Obligation	$ 40,000	$ 40,000
Interest rate per annum (as a percent)	5.87%	5.87%
5.87% notes due 2028 \| GSWC
Long-Term Debt
Debt and Lease Obligation	$ 40,000	$ 40,000
Interest rate per annum (as a percent)	5.87%	5.87%
2.17% notes due 2030
Long-Term Debt
Debt and Lease Obligation	$ 85,000	$ 85,000
Interest rate per annum (as a percent)	2.17%	2.17%
2.17% notes due 2030 \| GSWC
Long-Term Debt
Debt and Lease Obligation	$ 85,000	$ 85,000
Interest rate per annum (as a percent)	2.17%	2.17%
2.90% notes due 2040
Long-Term Debt
Debt and Lease Obligation	$ 75,000	$ 75,000
Interest rate per annum (as a percent)	2.90%	2.90%
2.90% notes due 2040 \| GSWC
Long-Term Debt
Debt and Lease Obligation	$ 75,000	$ 75,000
Interest rate per annum (as a percent)	2.90%	2.90%
5.50% notes due 2026
Long-Term Debt
Debt and Lease Obligation	$ 7,730	$ 7,730
Interest rate per annum (as a percent)	5.50%	5.50%
5.50% notes due 2026 \| GSWC
Long-Term Debt
Debt and Lease Obligation	$ 7,730	$ 7,730
Interest rate per annum (as a percent)	5.50%	5.50%
State Water Project due 2035
Long-Term Debt
Debt and Lease Obligation	$ 3,039	$ 3,322
State Water Project due 2035 \| GSWC
Long-Term Debt
Debt and Lease Obligation	3,039	3,322
American Recovery and Reinvestment Act Obligation due 2033
Long-Term Debt
Debt and Lease Obligation	3,019	3,219
American Recovery and Reinvestment Act Obligation due 2033 \| GSWC
Long-Term Debt
Debt and Lease Obligation	$ 3,019	$ 3,219

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Revenues
Water	$ 347,112	$ 330,637	$ 319,830
Electric	38,345	37,024	39,548
Contracted services	113,396	120,582	114,491
Total operating revenues	498,853	488,243	473,869
Operating Expenses
Water purchased	77,914	74,554	72,289
Power purchased for pumping	11,103	10,134	8,660
Groundwater production assessment	19,412	20,392	18,962
Power purchased for resale	11,240	10,423	11,796
Supply cost balancing accounts	(11,421)	(11,803)	(7,026)
Other operation	34,738	33,236	32,756
Administrative and general	83,547	83,615	83,034
Depreciation and amortization	39,596	36,850	35,397
Maintenance	12,781	15,702	15,466
Property and other taxes	22,522	22,199	20,042
ASUS construction	56,909	62,411	55,673
(Gain) loss on sale of assets	(465)	31	(253)
Total operating expenses	357,876	357,744	346,796
Operating Income	140,977	130,499	127,073
Other Income and Expenses
Interest expense	(22,834)	(22,531)	(24,586)
Interest income	1,493	1,801	3,249
Other, net	5,134	4,853	3,276
Total other income and expenses	(16,207)	(15,877)	(18,061)
Income before income tax expense	124,770	114,622	109,012
Income tax expense	30,423	28,197	24,670
Net Income	$ 94,347	$ 86,425	$ 84,342
Basic Earnings Per Common Share
Weighted Average Number of Shares Outstanding (in shares)	36,921	36,880	36,814
Earnings Per Share, Basic	$ 2.55	$ 2.34	$ 2.28
Fully Diluted Earnings Per Share
Weighted Average Number of Diluted Shares (in shares)	37,010	36,995	36,964
Earnings Per Share, Diluted	$ 2.55	$ 2.33	$ 2.28
Dividends Paid Per Common Share	$ 1.40	$ 1.28	$ 1.16
GSWC
Operating Revenues
Water	$ 347,112	$ 330,637	$ 319,830
Electric	0	18,647	39,548
Total operating revenues	347,112	349,284	359,378
Operating Expenses
Water purchased	77,914	74,554	72,289
Power purchased for pumping	11,103	10,134	8,660
Groundwater production assessment	19,412	20,392	18,962
Power purchased for resale	0	5,010	11,796
Supply cost balancing accounts	(11,295)	(11,749)	(7,026)
Other operation	25,781	25,194	26,336
Administrative and general	55,552	59,385	59,905
Depreciation and amortization	33,384	32,184	32,441
Maintenance	9,056	12,424	12,843
Property and other taxes	19,041	18,860	18,168
(Gain) loss on sale of assets	(409)	0	(88)
Total operating expenses	239,539	246,388	254,286
Operating Income	107,573	102,896	105,092
Other Income and Expenses
Interest expense	(21,474)	(21,495)	(23,399)
Interest income	428	718	1,867
Other, net	4,783	4,556	3,280
Total other income and expenses	(16,263)	(16,221)	(18,252)
Income before income tax expense	91,310	86,675	86,840
Income tax expense	22,095	21,704	20,177
Net Income	$ 69,215	$ 64,971	$ 66,663

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN COMMON SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	GSWC	Common Stock [Member]	Common Stock [Member]GSWC	Earnings Reinvested in the Business	Earnings Reinvested in the BusinessGSWC
Common stock, shares outstanding			36,758,000	165
Balances at Dec. 31, 2018	$ 558,223	$ 503,575	$ 253,689	$ 292,412	$ 304,534	$ 211,163
Add:
Net Income	84,342	66,663			84,342	66,663
Exercise of stock options and other issuance of Common Shares			89,000
Exercise of stock options and other issuance of Common Shares	519		$ 519
Stock-based compensation, net of taxes paid from shares withheld from employees related to net share settlements	1,148	1,150	1,148	1,150
Dividend equivalent rights on stock-based awards not paid in cash	210	192	210	192
Deduct:
Dividends on Common Shares	42,702	20,200			42,702	20,200
Dividend equivalent rights on stock-based awards	210	192			210	192
Balances at Dec. 31, 2019	601,530	551,188	$ 255,566	$ 293,754	345,964	257,434
Common stock, shares outstanding			36,847,000	165
Add:
Net Income	86,425	64,971			86,425	64,971
Exercise of stock options and other issuance of Common Shares			42,000	5
Exercise of stock options and other issuance of Common Shares	30	60,000	$ 30
Stock-based compensation, net of taxes paid from shares withheld from employees related to net share settlements	894	983	894	$ 983
Dividend equivalent rights on stock-based awards not paid in cash	176	169	176	169
Deduct:
Dividends on Common Shares	47,206	22,500			47,206	22,500
Dividend equivalent rights on stock-based awards	176	169			176	169
Balances at Dec. 31, 2020	$ 641,673	$ 583,298	$ 256,666	$ 354,906	385,007	228,392
Common stock, shares outstanding	36,889,103	170	36,889,000	170
Add:
Net Income	$ 94,347	$ 69,215			94,347	69,215
Exercise of stock options and other issuance of Common Shares			47,000	0
Exercise of stock options and other issuance of Common Shares	0	60,000	$ 0	$ 60,000
Stock-based compensation, net of taxes paid from shares withheld from employees related to net share settlements	1,616	1,473	1,616	1,473
Dividend equivalent rights on stock-based awards not paid in cash	160	151	160	151
Deduct:
Dividends on Common Shares	51,689	38,300			51,689	38,300
Dividends		71,344				71,344
Dividend equivalent rights on stock-based awards	160	151			160	151
Balances at Dec. 31, 2021	$ 685,947	$ 615,686	$ 258,442	$ 356,530	$ 427,505	$ 259,156
Common stock, shares outstanding	36,936,285	170	36,936,000	170

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash Flows From Operating Activities:
Net Income	$ 94,347	$ 86,425	$ 84,342
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	39,974	37,204	35,713
Provision for doubtful accounts	1,119	1,433	608
Deferred income taxes and investment tax credits	3,561	2,243	6,623
Stock-based compensation expense	2,566	2,463	2,517
(Gain) loss on sale of assets	(465)	31	(253)
Gain on investments held in a trust	(4,287)	(3,024)	(3,580)
Other - net	84	(908)	526
Changes in assets and liabilities:
Accounts receivable - customers	(4,688)	(13,272)	1,882
Unbilled revenue- receivable	1,037	6,678	5,515
Other accounts receivable	(1,422)	(1,204)	214
Receivable from the U.S. government	4,713	3,889	(1,144)
Materials and supplies	(3,544)	(2,190)	(654)
Prepayments and other assets	1,323	1,686	3,978
Contract Assets	235	(588)	3,979
Regulatory Assets / Liabilities	(5,842)	10,150	(11,597)
Accounts payable	(2,881)	5,348	(249)
Income taxes receivable / payable	(2,254)	12,270	(3,786)
Contract liabilities	(1,543)	(9,367)	3,637
Accrued pension and other post-retirement benefits	3,051	1,444	1,994
Other liabilities	2,000	2,593	(4,659)
Cash Flows From Operating Activities	115,584	122,170	116,864
Cash Flows From Investing Activities:
Capital expenditures	(144,515)	(130,423)	(151,940)
Proceeds from sale of assets	565	88	169
Other investments	1,142	1,275	1,424
Net Cash Provided by (Used in) Investing Activities	(145,092)	(131,610)	(153,195)
Cash Flows From Financing Activities:
Proceeds from stock option exercises	0	30	519
Proceeds from Advances for Construction	12,432	9,338	10,171
Refunds on advances for construction	(4,666)	(3,729)	(5,005)
Retirement or repayments of long-term debt	(28,356)	(336)	(40,325)
Increase (Decrease) in Notes Payable, Current	71,300	(70,800)	109,500
Proceeds from issuance of long-term debt, net of issuance costs	0	159,413	0
Dividends paid	(51,689)	(47,206)	(42,702)
Other	(1,287)	(1,867)	(1,634)
Net Cash Provided by (Used in) Financing Activities	(2,266)	44,843	30,524
Net change in cash and cash equivalents	(31,774)	35,403	(5,807)
Cash and cash equivalents, beginning of the year	36,737	1,334	7,141
Cash and cash equivalents, end of year	4,963	36,737	1,334
GSWC
Cash Flows From Operating Activities:
Net Income	69,215	64,971	66,663
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	33,643	32,477	32,757
Provision for doubtful accounts	1,018	1,018	606
Deferred income taxes and investment tax credits	2,308	1,181	5,081
Stock-based compensation expense	2,313	2,349	2,253
(Gain) loss on sale of assets	(409)	0	(88)
Gain on investments held in a trust	(4,287)	(3,024)	(3,580)
Other - net	200	(576)	58
Changes in assets and liabilities:
Accounts receivable - customers	(4,287)	(12,126)	1,882
Unbilled revenue- receivable	1,195	1,693	744
Other accounts receivable	592	(1,364)	311
Materials and supplies	(1,725)	(2,166)	(123)
Prepayments and other assets	1,860	1,124	4,230
Regulatory Assets / Liabilities	(2,854)	13,278	(11,597)
Accounts payable	(10)	1,810	1,558
Inter-company receivable / payable	1,479	(1,911)	1,056
Income taxes receivable / payable	(1,640)	12,339	(2,110)
Accrued pension and other post-retirement benefits	2,908	1,390	1,994
Other liabilities	1,165	1,260	(3,579)
Cash Flows From Operating Activities	100,294	110,337	96,628
Cash Flows From Investing Activities:
Capital expenditures	(123,526)	(116,409)	(142,852)
Note receivable from AWR parent	(26,000)	(6,000)	0
Receipt of payment of note receivable from AWR parent	26,000	6,000	0
Proceeds from sale of assets	409	0	88
Other investments	1,142	1,275	1,424
Net Cash Provided by (Used in) Investing Activities	(124,259)	(117,684)	(144,188)
Cash Flows From Financing Activities:
Proceeds from issuance of Common Shares to Parent	0	60,000	0
Proceeds from Advances for Construction	12,397	9,338	10,171
Refunds on advances for construction	(4,666)	(3,729)	(5,005)
Retirement or repayments of long-term debt	(28,356)	(336)	(40,325)
Proceeds from issuance of long-term debt, net of issuance costs	0	159,413	0
Net change in inter-company borrowings	(49,000)	158,000	(100,500)
Dividends paid	(38,300)	(22,500)	(20,200)
Other	(1,163)	(1,662)	(1,367)
Net Cash Provided by (Used in) Financing Activities	(11,088)	42,524	43,774
Net change in cash and cash equivalents	(35,053)	35,177	(3,786)
Cash and cash equivalents, beginning of the year	35,578	401	4,187
Cash and cash equivalents, end of year	$ 525	$ 35,578	$ 401

BALANCE SHEETS

BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets
Utility Plant, at cost	$ 1,898,817	$ 1,784,402
Less — accumulated depreciation	(594,264)	(568,326)
Construction work in progress	167,915	150,145
Net utility plant	1,626,004	1,512,043
Other Property and Investments	40,806	35,318
Total other property and investments	41,922	36,434
Current Assets
Cash and cash equivalents	4,963	36,737
Accounts receivable — customers, less allowance for doubtful accounts	34,416	29,162
Unbilled revenue — receivable	27,147	25,836
Other accounts receivable, less allowance for doubtful accounts	6,510	3,960
Materials and supplies	12,163	8,619
Regulatory assets — current	8,897	13,088
Prepayments and other current assets	5,317	5,555
Total current assets	138,052	157,115
Other Assets
Operating lease right-of-use assets	10,479	11,146
Regulatory assets	3,182	3,451
Other	16,230	10,597
Total other assets	95,005	86,011
Total Assets	1,900,983	1,791,603
Capitalization
Common shareholder’s equity	685,947	641,673
Long-term debt	412,176	440,348
Total capitalization	1,098,123	1,082,021
Current Liabilities
Long-term debt — current	377	358
Accounts payable	65,902	63,788
Income taxes payable to Parent	4,662	6,783
Accrued other taxes	17,137	11,902
Accrued employee expenses	16,256	15,122
Accrued interest	4,545	4,832
Operating lease liabilities	2,044	2,013
Other	11,498	10,437
Total current liabilities	155,574	118,572
Other Credits
Advances for construction	66,727	63,374
Contributions in aid of construction — net	147,482	140,332
Deferred income taxes	140,290	131,172
Regulatory liabilities	32,979	0
Unamortized investment tax credits	1,153	1,224
Accrued pension and other post-retirement benefits	61,365	95,639
Operating lease liabilities	8,920	9,636
Other	13,870	15,433
Total other credits	647,286	591,010
Liabilities and Equity, Total	1,900,983	1,791,603
GSWC
Assets
Utility Plant, at cost	1,898,817	1,784,402
Less — accumulated depreciation	(522,672)	(502,283)
Total	1,376,145	1,282,119
Construction work in progress	123,600	118,370
Net utility plant	1,499,745	1,400,489
Other Property and Investments	38,659	33,240
Total other property and investments	38,659	33,240
Current Assets
Cash and cash equivalents	525	35,578
Accounts receivable — customers, less allowance for doubtful accounts	31,870	26,920
Unbilled revenue — receivable	20,525	19,330
Other accounts receivable, less allowance for doubtful accounts	3,791	3,255
Intercompany receivable	0	1,107
Materials and supplies	5,384	3,659
Regulatory assets — current	8,897	11,325
Prepayments and other current assets	4,223	4,114
Total current assets	75,215	105,288
Other Assets
Operating lease right-of-use assets	10,439	11,103
Regulatory assets	0	1,048
Other	14,424	9,614
Total other assets	24,863	21,765
Total Assets	1,638,482	1,560,782
Capitalization
Common shareholder’s equity	615,686	583,298
Long-term debt	412,176	440,348
Total capitalization	1,027,862	1,023,646
Current Liabilities
Long-term debt — current	377	358
Accounts payable	50,627	45,613
Income taxes payable to Parent	2,972	4,612
Accrued other taxes	14,960	10,382
Accrued employee expenses	12,867	12,351
Accrued interest	4,210	4,545
Operating lease liabilities	2,029	1,956
Other	10,505	9,403
Total current liabilities	98,547	89,220
Other Credits
Intercompany payables	49,280	0
Advances for construction	66,707	63,354
Contributions in aid of construction — net	145,848	138,691
Deferred income taxes	132,314	124,581
Regulatory liabilities	32,979	0
Unamortized investment tax credits	1,153	1,224
Accrued pension and other post-retirement benefits	61,170	95,570
Operating lease liabilities	8,891	9,636
Other	13,731	14,860
Total other credits	512,073	447,916
Liabilities and Equity, Total	$ 1,638,482	$ 1,560,782

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
Summary of Significant Accounting Policies	Dec. 31, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Nature of Operations : American States Water Company (“AWR”) is the parent company of Golden State Water Company (“GSWC”), Bear Valley Electric Service Inc. ("BVESI"), and American States Utility Services, Inc. (“ASUS”) (and its wholly owned subsidiaries, Fort Bliss Water Services Company (“FBWS”), Terrapin Utility Services, Inc. (“TUS”), Old Dominion Utility Services, Inc. (“ODUS”), Palmetto State Utility Services, Inc. (“PSUS”), Old North Utility Services, Inc. (“ONUS”), Emerald Coast Utility Services, Inc. (“ECUS”), and Fort Riley Utility Services, Inc. ("FRUS")). AWR and its subsidiaries may be collectively referred to as “Registrant” or “the Company.” The subsidiaries of ASUS are collectively referred to as the “Military Utility Privatization Subsidiaries.” On July 1, 2020, GSWC completed the transfer of the electric utility assets and liabilities from its electric division to BVESI, a separate legal entity and wholly owned subsidiary of AWR (Note 20). This reorganization did not result in any substantive changes to AWR's operations and business segments. AWR, through its wholly owned subsidiaries, serves over one million people in nine states. GSWC and BVESI are both California public utilities, with GSWC engaged in the purchase, production, distribution and sale of water throughout California serving approximately 262,800 customers, while BVESI distributes electricity in several San Bernardino County mountain communities in California serving approximately 24,700 customers. The California Public Utilities Commission (“CPUC”) regulates GSWC’s and BVESI's businesses in matters including properties, rates, services, facilities, and transactions between GSWC, BVESI, and their affiliates. ASUS, through its Military Utility Privatization Subsidiaries, operates, maintains and performs construction activities (including renewal and replacement capital work) on water and/or wastewater systems at various U.S. military bases pursuant to 50-year firm fixed-price contracts. These contracts are subject to annual economic price adjustments and modifications for changes in circumstances, changes in laws and regulations and additions to the contract value for new construction of facilities at the military bases. There is no direct regulatory oversight by the CPUC over AWR or the operations, rates or services provided by ASUS or the Military Utility Privatization Subsidiaries. Basis of Presentation : The consolidated financial statements and notes thereto are presented in a combined report filed by two separate Registrants: AWR and GSWC. References in this report to “Registrant” are to AWR and GSWC, collectively, unless otherwise specified. AWR owns all of the outstanding Common Shares of GSWC, BVESI and ASUS. ASUS owns all of the outstanding common shares of the Military Utility Privatization Subsidiaries. The consolidated financial statements of AWR include the accounts of AWR and its subsidiaries. These financial statements are prepared in conformity with accounting principles generally accepted in the United States of America. Intercompany transactions and balances have been eliminated in the AWR consolidated financial statements. Related-Party Transactions : GSWC, BVESI and ASUS provide and/or receive various support services to and from their parent, AWR, and among themselves. GSWC also allocates certain corporate office administrative and general costs to its affiliates BVESI and ASUS using allocation factors approved by the CPUC. During the years ended December 31, 2021, 2020 and 2019, GSWC allocated to ASUS approximately $5.3 million, $4.9 million and $4.7 million, respectively, of corporate office administrative and general costs. During the years ended December 31, 2021 and 2020, GSWC allocated corporate office administrative and general costs to BVESI of approximately $2.8 million and $1.3 million, respectively. BVESI assumed operations of the electric segment on July 1, 2020. Furthermore, AWR borrows under a credit facility, which expires in May 2023, and provides funds to GSWC and ASUS in support of their operations. The interest rate charged to GSWC and ASUS is sufficient to cover AWR’s interest expense under the credit facility. As of December 31, 2021, GSWC had $49.3 million outstanding under its intercompany borrowing arrangement with AWR. The intercompany borrowing agreement with AWR is considered a short-term debt arrangement by the CPUC. GSWC has been authorized by the CPUC to borrow under this arrangement for a term of up to 24 months. Borrowings under this arrangement are, therefore, required to be fully paid off within a 24-month period. GSWC’s next pay-off period for its intercompany borrowings from AWR ends in May 2023. Accordingly, the $49.3 million outstanding has been classified as a non-current liability under “Other Credits” in GSWC’s Balance Sheet as of December 31, 2021. In October 2020, AWR issued an interest bearing promissory note to GSWC, which expires in May 2023. Under the terms of the note, AWR may borrow from GSWC amounts up to $30 million for working capital purposes. AWR agrees to pay any unpaid principal amounts outstanding under this note, plus accrued interest. During 2021, AWR borrowed and repaid a total of $26 million from GSWC under the terms of the note. As of December 31, 2021, there were no amounts outstanding under this note. COVID-19 Impact : GSWC, BVESI and ASUS have continued their operations throughout the COVID-19 pandemic given that their water, wastewater and electric utility services are deemed essential. AWR's responses take into account orders issued by the CPUC, and the guidance provided by federal, state, and local health authorities and other government officials for the COVID-19 pandemic. Some of the actions taken by GSWC and BVESI included suspending service disconnections for nonpayment pursuant to CPUC and state orders, and telecommuting by employees. The suspension of water-service disconnections at GSWC were implemented in response to an executive order from the governor of California, as well as CPUC orders. Pursuant to a CPUC decision issued in July 2021, the moratorium on water-service disconnections due to non-payment of past-due amounts billed to residential customers expired on February 1, 2022. However, water service cannot be disconnected so long as customers make timely payments on current bills, and are provided and adhere to payment plans to pay down past-due bills resulting from the pandemic. The moratorium on electric customer service disconnections ended on September 30, 2021. However, electric-service disconnections for non-payment can only be done after taking into account certain matters, such as average daily temperatures under certain conditions. The pandemic has caused volatility in financial markets resulting in fluctuations in the fair value of plan assets in GSWC's pension and other retirement plans. In addition, the economic impact of the pandemic has also significantly increased the amount of delinquent customer accounts receivable, resulting in both GSWC and BVESI increasing their allowance for doubtful accounts throughout the pandemic. However, the CPUC has authorized GSWC and BVESI to track incremental costs, including bad debt expense in excess of what is included in their respective revenue requirements, incurred as a result of the pandemic in COVID-19-related memorandum accounts to be filed with the CPUC for future recovery. On July 12, 2021, the governor of California approved SB-129 Budget Act of 2021, in which nearly $1 billion in relief funding for overdue water customer bills, and nearly $1 billion in relief funding for overdue electric customer bills were included. The water customer relief funding is being managed by the State Water Resources Control Board ("SWRCB") through the California Water and Wastewater Arrearage Payment Program to provide assistance to customers for their water debt accrued during the COVID-19 pandemic by remitting federal funds that the state received from the American Rescue Plan Act of 2021 to the utility on behalf of eligible customers. In December 2021, GSWC received SWRCB approval for $9.5 million of relief funding of customers' unpaid water bills incurred during the pandemic. In January 2022, GSWC received these funds, which it is applying to its delinquent customers' eligible balances. Accordingly, as of December 31, 2021, GSWC has reflected these relief funds as a reduction to its COVID-19 memorandum account, as well as a reduction to its estimated customer bad debt reserve. In February 2022, BVESI received $321,000 from the state of California for similar customer relief funding for unpaid electric customer bills incurred during the pandemic. GSWC and BVESI continue to experience delinquent account activity because of the ongoing pandemic. As of December 31, 2021, GSWC and BVESI had approximately $1.7 million and $302,000, respectively, in regulatory asset accounts related to bad debt expense in excess of their revenue requirements, the purchase of personal protective equipment, additional incurred printing costs, and other incremental COVID-19-related costs. The CPUC requires that amounts tracked in GSWC's and BVESI's COVID-19 memorandum accounts for unpaid customer bills be first offset by any (i) federal or state relief for customers' utility bill debt, and (ii) customer payments through payment-plan arrangements prior to receiving recovery from customers at large. After these offsets are made, GSWC and BVESI will each file with the CPUC for recovery of any remaining balances. By tracking incremental COVID-19-related costs in the CPUC-approved memorandum accounts, GSWC and BVESI can later ask for recovery of these costs from the CPUC. The COVID-19 memorandum account and other emergency-type memorandum accounts are established as a result of a state or federally declared emergency, and are therefore recognized as regulatory assets for future recovery. As a result, the amounts recorded in the COVID-19-related memorandum accounts have not impacted GSWC's and BVESI's earnings during the pandemic. ASUS has experienced some delays in receiving contract modifications from the U.S. government for additional construction projects due to government staffing shortages resulting from the COVID-19 pandemic but this has not had a material impact on its current operations. Utility Accounting : Registrant’s accounting policies conform to accounting principles generally accepted in the United States of America ("GAAP"), including the accounting principles for rate-regulated enterprises, which reflect the ratemaking policies of the CPUC and, to the extent applicable, the Federal Energy Regulatory Commission. GSWC and BVESI have incurred various costs and received various credits reflected as regulatory assets and liabilities. Accounting for such costs and credits as regulatory assets and liabilities is in accordance with the guidance for accounting for the effects of certain types of regulation. This guidance sets forth the application of GAAP for those companies whose rates are established by or are subject to approval by an independent third-party regulator. Under such accounting guidance, rate-regulated entities defer costs and credits on the balance sheet as regulatory assets and liabilities when it is probable that those costs and credits will be recognized in the ratemaking process in a period different from the period in which they would have been reflected in income by an unregulated company. These regulatory assets and liabilities are then recognized in the income statement in the period in which the same amounts are reflected in the rates charged for service. The amounts included as regulatory assets and liabilities that will be collected or refunded over a period exceeding one year are classified as long-term assets and liabilities as of December 31, 2021 and 2020. Property and Depreciation : Registrant's property consists primarily of regulated utility plant at GSWC and BVESI. GSWC and BVESI capitalize, as utility plant, the cost of construction and the cost of additions, betterments and replacements of retired units of property. Such costs includes labor, material and certain indirect charges. Water systems acquired are recorded at estimated original cost of utility plant when first devoted to utility service and the applicable depreciation is recorded to accumulated depreciation. The difference between the estimated original cost, less accumulated depreciation, and the purchase price, if recognized by the CPUC, is recorded as an acquisition adjustment within utility plant. Depreciation for the regulated utilities is computed on the straight-line, remaining-life basis, group method, in accordance with the applicable ratemaking process. The provision for depreciation expressed as a percentage of the aggregate depreciable asset balances for regulated utilities was 2.2% for each of the years 2021, 2020 and 2019. Depreciation expense for regulated utilities, excluding amortization expense and depreciation on transportation equipment, totaled $35.5 million, $32.9 million and $31.7 million for the years ended December 31, 2021, 2020 and 2019, respectively. Depreciation computed on regulated utilities’ transportation equipment is recorded in other operating expenses and totaled $379,000, $353,000 and $316,000 for the years 2021, 2020 and 2019, respectively. Expenditures for maintenance and repairs are expensed as incurred. Retired property costs, including costs of removal, are charged to the accumulated provision for depreciation. Estimated useful lives of regulated utilities’ utility plant, as authorized by the CPUC, are as follows: Source of water supply 30 years to 50 years Pumping 25 years to 40 years Water treatment 20 years to 35 years Transmission and distribution 25 years to 55 years Generation 40 years Other plant 7 years to 40 years Non-regulated property consists primarily of equipment utilized by ASUS and its subsidiaries for its operations. This property is stated at cost, net of accumulated depreciation, which is calculated using the straight-line method over the useful lives of the assets. Asset Retirement Obligations : GSWC has a legal obligation for the retirement of its wells, which by law need to be properly capped at the time of removal. As such, GSWC incurs asset retirement obligations. GSWC records the fair value of a liability for these asset retirement obligations in the period in which they are incurred. When the liability is initially recorded, GSWC capitalizes the cost by increasing the carrying amount of the related long-lived asset. Over time, the liability is accreted to its present value each period, and the capitalized cost is depreciated over the useful life of the related asset. Upon settlement of the liability, GSWC either settles the obligation for its recorded amount or incurs a gain or loss upon settlement. Retirement costs have historically been recovered through rates subsequent to the retirement costs being incurred. Accordingly, recoverability of GSWC’s asset retirement obligations are reflected as a regulatory asset. GSWC also reflects the loss or gain at settlement as a regulatory asset or liability on the balance sheet. With regards to removal costs associated with certain other long-lived assets, such as water mains, distribution and transmission assets, asset retirement obligations have not been recognized as GSWC believes there is no legal obligation to do so. There are no CPUC rules or regulations that require GSWC to remove any of its other long-lived assets. In addition, GSWC’s water pipelines are not subject to regulation by any federal regulatory agency. GSWC has franchise agreements with various municipalities in order to use the public right of way for utility purposes (i.e., operate water distribution and transmission assets), and if certain events occur in the future, GSWC could be required to remove or relocate certain of its pipelines. However, it is not possible to estimate an asset retirement amount since the timing and the amount of assets that may be required to be removed, if any, is not known. Amounts recorded for asset retirement obligations are subject to various assumptions and determinations, such as determining whether a legal obligation exists to remove assets, estimating the fair value of the costs of removal, when final removal will occur and the credit-adjusted risk-free interest rates to be utilized on discounting future liabilities. Changes that may arise over time with regard to these assumptions will change amounts recorded in the future. Revisions in estimates for timing or estimated cash flows are recognized as changes in the carrying amount of the liability and the related capitalized asset. The estimated fair value of the costs of removal was based on third-party costs. Impairment of Long-Lived Assets : Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be fully recoverable in accordance with accounting guidance for impairment or disposal of long-lived assets. Registrant would recognize an impairment loss on its regulated assets only if the carrying value amount of a long-lived asset is not recoverable from customer rates authorized by the CPUC. Impairment loss is measured as the excess of the carrying value over the amounts recovered in customer rates. For the years ended December 31, 2021, 2020 and 2019, no impairment loss was incurred. Goodwill : At December 31, 2021 and 2020, AWR had approximately $1.1 million of goodwill. The $1.1 million goodwill arose from ASUS’s acquisition of a subcontractor’s business at some of the Military Utility Privatization Subsidiaries. In accordance with the accounting guidance for testing goodwill, AWR annually assesses qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. For 2021 and 2020, AWR’s assessment of qualitative factors did not indicate that an impairment had occurred for goodwill at ASUS. Cash and Cash Equivalents : Cash and cash equivalents include short-term cash investments with an original maturity of three months or less. At times, cash and cash equivalent balances may be in excess of federally insured limits. Cash and cash equivalents are held with financial institutions with high credit standings. Accounts Receivable : Accounts receivable is reported on the balance sheet net of any allowance for doubtful accounts. The allowance for doubtful accounts is Registrant’s best estimate of the amount of probable credit losses in Registrant’s existing accounts receivable from its water and electric customers, and is determined based on expected losses rather than incurred losses. Registrant reviews the allowance for doubtful accounts quarterly. Account balances are written off against the allowance when it is probable the receivable will not be recovered. When utility customers request extended payment terms, credit is extended based on regulatory guidelines, and collateral is not required. Receivables from the U.S. government include amounts due under contracts with the U.S. government to operate and maintain, and/or provide construction services for the water and/or wastewater systems at military bases. Other accounts receivable consist primarily of amounts due from third parties (non-utility customers) for various reasons, including amounts due from contractors, amounts due under settlement agreements and amounts due from other third-party prime government contractors pursuant to agreements for construction of water and/or wastewater facilities for such third-party prime contractors. The allowance for these other accounts receivable is based on Registrant’s evaluation of the receivable portfolio under current conditions and a review of specific problems and such other factors that, in Registrant’s judgment, should be considered in estimating losses. Allowances for doubtful accounts are disclosed in Note 18. Materials and Supplies : Materials and supplies are stated at the lower of cost or net realizable value. Cost is computed using weighted average cost. Major classes of materials include pipe, meters, hydrants and valves. Interest : Interest incurred during the construction of capital assets has generally not been capitalized for financial reporting purposes as such policy is not followed in the ratemaking process. Interest expense is generally recovered through the regulatory process. At times, the CPUC has authorized certain capital projects to be filed for revenue recovery with advice letters when those projects are completed. During the time that such projects are under development and construction, GSWC or BVESI may accrue an allowance for funds used during construction (“AFUDC”) on the incurred expenditures to offset the cost of financing project construction. For the year ended December 31, 2021 and 2020, BVESI recorded $216,000 and $200,000, respectively in AFUDC. For the year ended December 31, 2019, the amount of AFUDC recorded was immaterial. Debt Issuance Costs and Redemption Premiums : Original debt issuance costs are deducted from the carrying value of the associated debt liability and amortized over the lives of the respective issues. Premiums paid on the early redemption of debt are deferred as regulatory assets and amortized over the period that GSWC recovers such costs in rates, which is generally over the term of the new debt issued to finance the early redemption. At December 31, 2021 and 2020, all of Registrant’s long-term debt have been issued by GSWC. Advances for Construction and Contributions in Aid of Construction : Advances for construction represent amounts advanced by developers for the cost to construct water system facilities in order to extend water service to their properties. Advances are refundable in equal annual installments, generally over 40 years. In certain instances, GSWC makes refunds on these advances over a specific period of time based on operating revenues related to the main or as new customers are connected to receive service from the main. Contributions in aid of construction are similar to advances but require no refunding. Generally, GSWC and BVESI depreciate contributed property and amortize contributions in aid of construction at the composite rate of the related property. Utility plant funded by advances and contributions is excluded from rate base. Fair Value of Financial Instruments : For cash and cash equivalents, accounts receivable, accounts payable and short-term debt, the carrying amount is assumed to approximate fair value due to the short-term nature of the amounts. The table below estimates the fair value of long-term debt issued by GSWC. Rates available to GSWC at December 31, 2021 and 2020 for debt with similar terms and remaining maturities were used to estimate fair value for long-term debt. Changes in the assumptions will produce differing results. 2021 2020 (dollars in thousands) Carrying Amount Fair Value Carrying Amount Fair Value Long-term debt—GSWC (1) $ 415,788 $ 490,852 $ 444,271 $ 559,752 (1) Excludes debt issuance costs and redemption premiums. The accounting guidance for fair value measurements applies to all financial assets and financial liabilities that are being measured and reported on a fair value basis. Under the accounting guidance, GSWC makes fair value measurements on its publicly issued notes, private placement notes and other long-term debt using current U.S. corporate bond yields for similar debt instruments. Under the fair value guidance, these are classified as Level 2, which consists of quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability. The following table sets forth by level, within the fair value hierarchy, GSWC’s long-term debt measured at fair value as of December 31, 2021: (dollars in thousands) Level 1 Level 2 Level 3 Total Long-term debt—GSWC — $ 490,852 — $ 490,852 Stock-Based Awards : AWR has issued stock-based awards to its employees under stock incentive plans. AWR has also issued stock-based awards to its Board of Directors under non-employee directors stock plans. Registrant applies the provisions in the accounting guidance for share-based payments in accounting for all of its stock-based awards. See Note 13 for further discussion. Recently Issued Accounting Pronouncements : Accounting Pronouncements Adopted in 2021 In December 2019, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2019-12, Income Taxes (Topic 740)—Simplifying the Accounting for Income Taxes

Revenues

Revenues	12 Months Ended
Revenues	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenues	Revenues Most of Registrant's revenues are accounted for under the revenue recognition accounting standard, "Revenue from Contracts with Customers - (Topic 606)." GSWC and BVESI provide utility services to customers as specified by the CPUC. The transaction prices for water and electric revenues are based on tariff rates authorized by the CPUC, which include both quantity-based and flat-rate charges. Tariff revenues represent the adopted revenue requirement authorized by the CPUC intended to provide GSWC and BVESI with an opportunity to recover its costs and earn a reasonable return on its net capital investment. The annual revenue requirements are comprised of supply costs, operation and maintenance costs, administrative and general costs, depreciation and taxes in amounts authorized by the CPUC, and a return on rate base consistent with the capital structure authorized by the CPUC. Water and electric revenues are recognized over time as customers simultaneously receive and use the utility services provided. Water and electric revenues include amounts billed to customers on a cyclical basis, nearly all of which are based on meter readings for services provided. Customer bills also include surcharges for cost-recovery activities, which represent CPUC-authorized balancing and memorandum accounts that allow for the recovery of previously incurred operating costs. Revenues from these surcharges do not impact earnings as they are offset by corresponding increases in operating expenses to reflect the recovery of the associated costs. Customer payment terms are approximately 20 business days from the billing date. Unbilled revenues are amounts estimated to be billed for usage since the last meter-reading date to the end of the accounting period. The most recent customer billed usage forms the basis for estimating unbilled revenue. GSWC and BVESI bill certain sales and use taxes levied by state or local governments to its customers. Included in these sales and use taxes are franchise fees, which are paid to various municipalities and counties (based on their ordinances) in order to use public rights of way for utility purposes. GSWC and BVESI bill these franchise fees to its customers based on a CPUC-authorized rate for each ratemaking area as applicable. These franchise fees, which are required to be paid regardless of GSWC’s or BVESI's ability to collect them from its customers, are accounted for on a gross basis. Franchise fees billed to customers and recorded as operating revenue were approximately $4.2 million, $3.8 million and $4.0 million for the years ended December 31, 2021, 2020 and 2019, respectively. When GSWC or BVESI act as an agent, and a tax is not required to be remitted if it is not collected from customers, the tax is accounted for on a net basis. As currently authorized by the CPUC, GSWC and BVESI record in revenues the difference between the adopted level of volumetric revenues as authorized by the CPUC for metered accounts (volumetric revenues) and the actual volumetric revenues recovered in customer rates. For GSWC, the difference is tracked under the Water Revenue Adjustment Mechanism (“WRAM”) regulatory accounts, and for BVESI the difference is tracked in the Base Revenue Requirement Adjustment Mechanism ("BRRAM") regulatory account. If this difference results in an under-collection of revenues, additional revenue is recorded only to the extent that the difference is expected to be collected within 24 months following the year in which they are recorded in accordance with Accounting Standards Codification ("ASC") Topic 980, Regulated Operations . ASUS's 50-year firm fixed-price contracts with the U.S. government are considered service concession arrangements under ASC 853 Service Concession Arrangements . Accordingly, the services under these contracts are accounted for under Topic 606 Revenue from Contracts with Customers and the water and/or wastewater systems are not recorded as Property, Plant and Equipment on Registrant’s balance sheet. For ASUS, performance obligations consist of (i) performing ongoing operation and maintenance of the water and/or wastewater systems and treatment plants for each military base served, and (ii) performing construction activities (including renewal and replacement capital work) on each military base served. The transaction price for each performance obligation is either delineated in, or initially derived from, the applicable 50-year contract and/or any subsequent contract modifications. Depending on the state in which operations are conducted, the Military Utility Privatization Subsidiaries are also subject to certain state non-income tax assessments, which are accounted for on a gross basis and have been immaterial to date. The ongoing performance of operation and maintenance of the water and/or wastewater systems and treatment plants is viewed as a single performance obligation for each 50-year contract with the U.S. government. Registrant recognizes revenue for operations and maintenance fees monthly using the "right to invoice" practical expedient under ASC Topic 606. ASUS has a right to consideration from the U.S. government in an amount that corresponds directly to the value to the U.S. government of ASUS’s performance completed to-date. The contractual operations and maintenance fees are firm-fixed, and the level of effort or resources expended in the performance of the operations-and-maintenance-fees performance obligation is largely consistent over the 50-year term. Therefore, Registrant has determined that the monthly amounts invoiced for operations and maintenance performance are a fair reflection of the value transferred to the U.S. government. Invoices to the U.S. government for operations and maintenance service, as well as construction activities, are due upon receipt. ASUS's construction activities consist of various projects to be performed. Each of these projects' transaction prices are delineated either in the 50-year contract or through a specific contract modification for each construction project, which includes the transaction price for that project. Each construction project is viewed as a separate, single performance obligation. Therefore, it is generally unnecessary to allocate a construction transaction price to more than one construction performance obligation. Revenues for construction activities are recognized over time, with progress toward completion measured based on the input method using costs incurred relative to the total estimated costs (cost-to-cost method). Due to the nature of these construction projects, Registrant has determined the cost-to-cost input measurement to be the best method to measure progress towards satisfying its construction contract performance obligations, as compared to using an output measurement such as units produced. Changes in job performance, job site conditions, change orders and/or estimated profitability may result in revisions to costs and income for ASUS, and are recognized in the period in which any such revisions are determined. Pre-contract costs for ASUS, which consist of design and engineering labor costs, are deferred if recovery is probable, and are expensed as incurred if recovery is not probable. Deferred pre-contract costs have been immaterial to date. Contracted services revenues recognized during the years ended December 31, 2021, 2020 and 2019 and from performance obligations satisfied in previous periods were not material. Although GSWC and BVESI have a diversified base of residential, commercial, industrial and other customers, revenues derived from residential and commercial customers account for nearly 90% of total water revenues, and 90% of total electric revenues. The vast majority of ASUS's revenues are from the U.S. government. For the years ended December 31, 2021, 2020, and 2019, disaggregated revenues from contracts with customers by segment are as follows: (dollar in thousands) For The Year Ended December 31, 2021 For The Year Ended December 31, 2020 For The Year Ended December 31, 2019 Water: Tariff-based revenues $ 345,562 $ 329,670 $ 305,244 CPUC-approved surcharges (cost-recovery activities) 3,280 3,736 4,322 Other 2,227 2,100 2,006 Water revenues from contracts with customers 351,069 335,506 311,572 WRAM (over)/under-collection (alternative revenue program) (3,957) (4,869) 8,258 Total water revenues 347,112 330,637 319,830 Electric: Tariff-based revenues 37,124 35,283 36,628 CPUC-approved surcharges (cost-recovery activities) 310 686 410 Electric revenues from contracts with customers 37,434 35,969 37,038 BRRAM under-collection (alternative revenue program) 911 1,055 2,510 Total electric revenues 38,345 37,024 39,548 Contracted services: Water 71,210 74,898 59,868 Wastewater 42,186 45,684 54,623 Contracted services revenues from contracts with customers 113,396 120,582 114,491 Total revenues $ 498,853 $ 488,243 $ 473,869 The opening and closing balances of the receivable from the U.S. government, contract assets and contract liabilities from contracts with customers, which related entirely to ASUS, are as follows: (dollar in thousands) December 31, 2021 December 31, 2020 Unbilled receivables $ 14,835 $ 14,924 Receivable from the U.S. government $ 79,818 $ 74,670 Contract assets $ 9,587 $ 10,257 Contract liabilities $ 257 $ 1,800 Unbilled receivables and Receivable from the U.S. government represent receivables where the right to payment is conditional only by the passage of time. Contract Assets - Contract assets are those of ASUS and consist of unbilled revenues recognized from work-in-progress construction projects where the right to payment is conditional on something other than the passage of time. The classification of this asset as current or noncurrent is based on the timing of when ASUS expects to bill these amounts. Contract Liabilities - Contract liabilities are those of ASUS and consist of billings in excess of revenue recognized. The classification of this liability as current or noncurrent is based on the timing of when ASUS expects to recognize revenue. The majority of contract liabilities at the beginning of the period were recognized as revenues for the year ended December 31, 2021. As of December 31, 2021, Registrant's aggregate remaining performance obligations, all of which are for the contracted services segment, was $3.3 billion. Registrant expects to recognize revenue on these remaining performance obligations over the remaining terms of each of the 50-year contracts, which range from 33 to 47 years. Each of the contracts with the U.S. government is subject to termination, in whole or in part, prior to the end of its 50-year term for the convenience of the U.S. government.

Regulatory Matters

Regulatory Matters	12 Months Ended
Regulatory Matters	Dec. 31, 2021
Regulated Operations [Abstract]
Regulatory Matters	Regulatory Matters In accordance with accounting principles for rate-regulated enterprises, Registrant records regulatory assets, which represent probable future recovery of costs from customers through the ratemaking process, and regulatory liabilities, which represent probable future refunds that are to be credited to customers through the ratemaking process. At December 31, 2021, Registrant had approximately $61.4 million of regulatory liabilities, net of regulatory assets, not accruing carrying costs. Of this amount, (i) $77.0 million of regulatory liabilities relates to the creation of an excess deferred income tax liability brought about by a lower federal income tax rate as a result of the 2017 Tax Cuts and Jobs Act ("TCJA") that is expected to be refunded to customers (Note 11), (ii) $6.3 million of net regulatory liabilities relates to flow-through deferred income taxes including the gross-up portion on the deferred tax resulting from the excess deferred income tax regulatory liability (Note 11), and (iii) $24.9 million of regulatory assets relates to the underfunded position in Registrant's pension and other post-retirement obligations (excluding the two-way pension balancing accounts). The remainder relates to other items that do not provide for or incur carrying costs. Regulatory assets represent costs incurred by GSWC and BVESI for which either has received or expects to receive rate recovery in the future. In determining the probability of costs being recognized in other periods, GSWC and BVESI consider regulatory rules and decisions, past practices, and other facts or circumstances that would indicate if recovery is probable. If the CPUC determines that a portion of either GSWC’s or BVESI's assets are not recoverable in customer rates, the applicable entity must determine if it has suffered an asset impairment that requires it to write down the asset's value. Regulatory assets are offset against regulatory liabilities within each ratemaking area. Amounts expected to be collected or refunded in the next twelve months have been classified as current assets and current liabilities by ratemaking area. Regulatory liabilities, less regulatory assets, included in the consolidated balance sheets are as follows: December 31, (dollars in thousands) 2021 2020 GSWC Water Revenue Adjustment Mechanism, net of the Modified Cost Balancing Account $ 13,326 $ 13,741 Costs deferred for future recovery on Aerojet case 5,210 6,751 Pensions and other post-retirement obligations (Note 12) 25,212 65,576 COVID-19 memorandum account 1,663 4,119 Other regulatory assets 11,739 10,670 Excess deferred income taxes (Note 11) (73,000) (74,185) Flow-through taxes, net (Note 11) (5,552) (9,722) Various refunds to customers (2,680) (4,577) Total GSWC $ (24,082) $ 12,373 BVESI Derivative unrealized (gain) loss (Note 5) (4,441) 1,537 Other regulatory assets 13,916 9,451 Various refunds to customers (8,189) (6,822) Total AWR $ (22,796) $ 16,539 Alternative-Revenue Programs: GSWC records the difference between what it bills its water customers and that which is authorized by the CPUC using the Water Revenue Adjustment Mechanism ("WRAM") and the Modified Cost Balancing Account (“MCBA”) accounts approved by the CPUC. The over- or under-collection of the WRAM is aggregated with the MCBA over- or under-collection for the corresponding ratemaking area and bears interest at the current 90-day commercial-paper rate. During the year ended December 31, 2021, $7.5 million of pre-2021 WRAM/MCBA balances were recovered through surcharges. During 2021, GSWC recorded an additional $7.1 million net under-collection in the WRAM/MCBA. The majority of this balance represents an under-collection of supply costs incurred and recorded in the MCBA due to a higher volume of purchased water as compared to adopted. As of December 31, 2021, GSWC had an aggregated regulatory asset of $13.3 million, which is comprised of a $3.8 million over-collection in the WRAM accounts and a $17.1 million under-collection in the MCBA accounts. As required by the accounting guidance for alternative revenue programs, GSWC is required to collect its WRAM balances within 24 months following the year in which an under-collection is recorded. As of December 31, 2021, there were no WRAM under-collections that were estimated to be collected over more than 24 months. Costs Deferred for Future Recovery : The CPUC authorized a memorandum account to allow for the recovery of costs incurred by GSWC related to contamination lawsuits brought against Aerojet-General Corporation ("Aerojet") and the state of California. In July 2005, the CPUC authorized GSWC to recover approximately $21.3 million of the Aerojet litigation memorandum account, through a rate surcharge, which will continue for no longer than 20 years. Beginning in October 2005, a surcharge went into effect to begin amortizing the memorandum account over a 20-year period. Aerojet also agreed to reimburse GSWC $17.5 million, plus interest accruing from January 1, 2004, for GSWC’s past legal and expert costs, which is included in the Aerojet litigation memorandum account. The reimbursement of the $17.5 million is contingent upon the issuance of land use approvals for development in a defined area within Aerojet property in Eastern Sacramento County and the receipt of certain fees in connection with such development. It is management’s intention to offset any proceeds from the housing development by Aerojet in this area against the balance in this litigation memorandum account. At this time, management believes the full balance of the Aerojet litigation memorandum account will be collected either from customers or Aerojet. Pensions and Other Post-retirement Obligations : A regulatory asset has been recorded at December 31, 2021 and 2020 for the costs that would otherwise be charged to “other comprehensive income” within shareholders’ equity for the underfunded status of Registrant’s pension and other post-retirement benefit plans because the cost of these plans has historically been recovered through rates. As discussed in Note 12, as of December 31, 2021, Registrant’s underfunded position for these plans that have been recorded as a regulatory asset totaled $25.0 million. Registrant expects this regulatory asset to be recovered through rates in future periods. The CPUC has authorized GSWC and BVESI to each use two-way balancing accounts to track differences between the forecasted annual pension expenses adopted in their respective customer rates and the actual annual expense to be recorded in accordance with the accounting guidance for pension costs. The two-way balancing accounts bear interest at the current 90-day commercial paper rate. As of December 31, 2021, GSWC has a $261,000 under-collection related to the general office and water regions, and BVESI has a $246,000 over-collection in its two-way balancing account. COVID-19 Memorandum Accounts : The CPUC has approved GSWC and BVESI to activate memorandum accounts, such as a Catastrophic Event Memorandum Account ("CEMA"), to track incremental COVID-19-related costs, including bad debt expense in excess of what is included in their respective revenue requirements. As previously discussed, in December 2021, GSWC received approval from the SWRCB for $9.5 million of relief funding of customers' unpaid water bills incurred during the pandemic, and subsequently received the funds from the state of California in January of 2022. As of December 31, 2021, GSWC has reflected these relief funds as a reduction to its CEMA account, as well as a reduction to its estimated customer bad debt reserve. However, GSWC continues to experience delinquent account activity because of the ongoing pandemic. As of December 31, 2021, GSWC has approximately $1.7 million in regulatory asset accounts related to bad debt expense in excess of its revenue requirements, the purchase of personal protective equipment, additional incurred printing costs, and other incremental COVID-19 related costs. In February 2022, BVESI received $321,000 from the state of California for similar customer relief funding for unpaid electric bills incurred during the pandemic. As of December 31, 2021, BVESI has approximately $302,000 in a regulatory asset account related to bad debt expense in excess of BVESI’s revenue requirements, and other incremental COVID-19 related costs. This balance takes into consideration the relief funds received in 2022 for unpaid electric bills. The CPUC requires that amounts tracked in GSWC's and BVESI's COVID-19 memorandum accounts for unpaid customer bills be first offset by any (i) federal or state relief for customers' utility bill debt, and (ii) customer payments through payment-plan arrangements prior to receiving recovery from customers at large. After these offsets are made, GSWC and BVESI will each file with the CPUC for recovery of any remaining balances. Other BVESI Regulatory Assets: Vegetation Management, Wildfire Mitigation Plans and Legislation In August 2019, the CPUC issued a final decision on the electric general rate case, which set new rates for the years 2018 - 2022. Among other things, the decision authorized BVESI to record incremental costs related to vegetation management, such as costs for increased minimum clearances around electric power lines, in a CPUC-approved account for future recovery. As of December 31, 2021, BVESI has approximately $5.8 million in incremental vegetation management costs recorded as a regulatory asset, which BVESI intends to include for recovery in its next general rate case application scheduled to be filed with the CPUC in 2022 to set new rates for the years 2023 through 2026. California legislation enacted in September 2018 requires all investor-owned electric utilities to submit an annual wildfire mitigation plan (WMP) to the CPUC for approval. The WMP must include a utility's plans on constructing, maintaining, and operating its electrical lines and equipment to minimize the risk of catastrophic wildfire. In September 2021, the CPUC approved BVESI's most recent WMP submission. Capital expenditures and other costs incurred as a result of the WMP are subject to CPUC audit. As a result, the CPUC’s Wildfire Safety Division (now part of the California Natural Resources Agency effective July 1, 2021) engaged an independent accounting firm to conduct examinations of the expenses and capital investments identified in the 2019 and 2020 WMPs for each of the investor-owned electric utilities, including BVESI. As of December 31, 2021, BVESI has approximately $2.8 million related to expenses accumulated in its WMP memorandum accounts that have been recognized as regulatory assets for future recovery. In December 2021, the independent accounting firm issued its final examination report, which contains the auditors' results and recommendations. While the final report did not identify any findings of inappropriate costs included in the WMP memorandum accounts under review, the report suggested that the CPUC should evaluate whether some of the costs recorded in the WMP memorandum accounts are incremental to what is being recovered in customer rates when BVESI seeks recovery in a future proceeding. At this time, BVESI considers the auditor's examination complete and does not expect further developments. In the future, the CPUC may refer to the recommendations of the final report when BVESI seeks recovery of the WMP memorandum accounts. All capital expenditures and other costs incurred through December 31, 2021 as a result of BVESI's WMPs are not currently in rates and are expected to be filed for future recovery in BVESI's next general rate case application. BVESI Winter Storm Regulatory Asset BVESI activated a memorandum account to track the incremental costs incurred in response to a severe winter storm that occurred in February 2019 and resulted in the declaration of an emergency by the governor of California. Incremental costs of approximately $455,000 were included in the winter storm memorandum account and recorded as a regulatory asset. BVESI subsequently filed for recovery of these costs. In May 2021, the CPUC issued a final decision denying BVESI’s request for recovery, claiming that BVESI did not adequately demonstrate that the costs incurred were incremental and beyond costs already included in BVESI’s revenue requirement, but permits BVESI to file a new application solely on the issue of incrementality. BVESI believes the storm costs were incremental and beyond what was included in its revenue requirement, and in October 2021 filed a new application to continue pursuing recovery. As a result, the costs in this memorandum account remain a regulatory asset at December 31, 2021 as BVESI continues to believe the incremental costs were properly tracked and included in the memorandum account consistent with the CPUC's well-established past practices, and that these costs are probable of recovery. However, if BVESI does not ultimately prevail in obtaining recovery, it will result in a charge to earnings from a write-off of this regulatory asset of approximately $455,000. Other Regulatory Assets:

Utility Plant and Intangible As

Utility Plant and Intangible Assets	12 Months Ended
Utility Plant and Intangible Assets	Dec. 31, 2021
Utility Plant and Intangible Assets
Utility Plant and Intangible Assets	Utility Plant and Intangible Assets The following table shows Registrant’s utility plant (regulated utility plant and non-regulated utility property) by major asset class: AWR GSWC (dollars in thousands) 2021 2020 2021 2020 Water Land $ 18,207 $ 18,234 $ 18,207 $ 18,234 Intangible assets 29,028 28,906 29,028 28,906 Source of water supply 98,244 92,166 98,244 92,166 Pumping 209,936 190,901 209,936 190,901 Water treatment 83,922 81,272 83,922 81,272 Transmission and distribution 1,356,649 1,277,361 1,356,649 1,277,361 Other 139,895 128,877 102,831 95,562 1,935,881 1,817,717 1,898,817 1,784,402 Electric (Note 20) Transmission and distribution 90,491 87,461 — — Generation 12,583 12,583 — — Other (1) 13,398 12,463 — — 116,472 112,507 — — Less — accumulated depreciation (594,264) (568,326) (522,672) (502,283) Construction work in progress 167,915 150,145 123,600 118,370 Net utility plant $ 1,626,004 $ 1,512,043 $ 1,499,745 $ 1,400,489 (1) Includes intangible assets of $1.2 million for the years ended December 31, 2021 and 2020 for studies performed in association with the electric segment. As of December 31, 2021 and 2020, intangible assets consist of the following: Weighted Average Amortization AWR December 31, GSWC December 31, (dollars in thousands) Period 2021 2020 2021 2020 Intangible assets : Conservation programs 3 years $ 9,486 $ 9,486 $ 9,486 $ 9,486 Water and service rights (2) 30 years 8,695 8,694 8,124 8,124 Water planning studies 14 years 12,258 12,141 11,019 10,898 Total intangible assets 30,439 30,321 28,629 28,508 Less — accumulated amortization (26,401) (24,460) (25,109) (24,305) Intangible assets, net of amortization $ 4,038 $ 5,861 $ 3,520 $ 4,203 Intangible assets not subject to amortization (3) $ 400 $ 399 $ 399 $ 399 (2) Includes intangible assets of $571,000 for contracted services included in "Other Property and Investments" on the consolidated balance sheets as of December 31, 2021 and 2020. (3) The intangible assets not subject to amortization primarily consist of organization and consent fees. For the years ended December 31, 2021, 2020 and 2019, amortization of intangible assets was $700,000, $654,000 and $1.3 million, respectively, for both AWR and GSWC. Estimated future consolidated amortization expense related to intangible assets for the succeeding five years are (in thousands): Amortization 2022 $ 672 2023 672 2024 672 2025 672 2026 672 Total $ 3,360 Asset Retirement Obligations : The following is a reconciliation of the beginning and ending aggregate carrying amount of asset retirement obligations, which are included in “Other Credits” on the balance sheets as of December 31, 2021 and 2020: (dollars in thousands) GSWC Obligation at December 31, 2019 $ 8,863 Additional liabilities incurred 165 Liabilities settled (58) Accretion 350 Obligation at December 31, 2020 $ 9,320 Additional liabilities incurred 148 Liabilities settled (120) Accretion 369 Obligation at December 31, 2021 $ 9,717

Derivative Instruments

Derivative Instruments	12 Months Ended
Derivative Instruments	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives Instruments	Derivative Instruments BVESI purchases power under long-term contracts at a fixed cost over three These long-term contracts are subject to the accounting guidance for derivatives and require mark-to-market derivative accounting. Among other things, the CPUC authorized BVESI to establish a regulatory asset and liability memorandum account to offset the mark-to-market entries required by the accounting guidance. Accordingly, all unrealized gains and losses generated from these purchased power contracts are deferred on a monthly basis into a non-interest bearing regulatory memorandum account that tracks the changes in fair value of the derivative throughout the term of the contract. As a result, these unrealized gains and losses do not impact Registrant’s earnings. As of December 31, 2021, there was a $4.4 million unrealized gain asset with a corresponding regulatory liability in the memorandum account for the three As previously discussed in Note 1, the accounting guidance for fair value measurements establishes a framework for measuring fair value and requires fair value measurements to be classified and disclosed in one of three levels. Registrant’s valuation model utilizes various inputs that include quoted market prices for energy over the duration of the contracts. The market prices used to determine the fair value for these derivative instruments were estimated based on independent sources such as broker quotes and publications that are not observable in or corroborated by the market. When such inputs have a significant impact on the measurement of fair value, the instrument is categorized as Level 3. Accordingly, the valuation of the derivatives on Registrant’s purchased power contracts have been classified as Level 3 for all periods presented. The unrealized gain as of December 31, 2021 as compared to an unrealized loss in as of December 31, 2020 was due to an increase in energy prices since the execution of the contracts. The following table presents changes in the fair value of BVESI’s derivatives for the years 2021 and 2020: (dollars in thousands) 2021 2020 Balance, at beginning of the period $ (1,537) $ (3,171) Unrealized gain on purchased power contracts 5,978 1,634 Balance, at end of the period $ 4,441 $ (1,537)

Military Privatization

Military Privatization	12 Months Ended
Military Privatization	Dec. 31, 2021
Military Privatization
Military Privatization	Military Privatization Each of the Military Utility Privatization Subsidiaries have entered into a service contract(s) with the U.S. government to operate and maintain, as well as perform construction activities to renew and replace, the water and/or wastewater systems at a military base or bases. The amounts charged for these services are based upon the terms of the 50-year contract between the Military Utility Privatization Subsidiaries and the U.S. government. Under the terms of each of these agreements, the Military Utility Privatization Subsidiaries agree to operate and maintain the water and/or wastewater systems for: (i) a monthly net fixed-price for operation and maintenance, and (ii) an amount to cover renewal and replacement capital work. In addition, these contracts may also include firm, fixed-priced initial capital upgrade projects to upgrade the existing infrastructure. Contract modifications are also issued for other necessary capital upgrades to the existing infrastructure approved by the U.S. government. Under the terms of each of these contracts, prices are subject to an economic price adjustment ("EPA") provision, on an annual basis. Prices may also be equitably adjusted for changes in law and other circumstances. ASUS is permitted to file, and has filed, requests for equitable adjustment. Each of the contracts may be subject to termination, in whole or in part, prior to the end of the 50-year term for convenience of the U.S. government or as a result of default or nonperformance by a Military Utility Privatization Subsidiary. ASUS has experienced delays in receiving EPAs as provided for under its 50-year contracts. Because of the delays, EPAs, when finally approved, are retroactive. During 2021, the U.S. government approved EPAs at eight of the bases served. In some cases, these EPAs included retroactive operation and maintenance management fees for prior periods. For the years ended December 31, 2021, 2020 and 2019, retroactive operation and maintenance management fees related to prior periods were immaterial.

Earnings Per Share and Capital

Earnings Per Share and Capital Stock	12 Months Ended
Earnings Per Share and Capital Stock	Dec. 31, 2021
Earnings Per Share [Abstract]
Earnings Per Share and Capital Stock	Earnings Per Share and Capital Stock In accordance with the accounting guidance for participating securities and earnings per share (“EPS”), Registrant uses the “two-class” method of computing EPS. The “two-class” method is an earnings allocation formula that determines EPS for each class of common stock and participating security. AWR has participating securities related to restricted stock units that earn dividend equivalents on an equal basis with AWR’s Common Shares that have been issued under AWR’s 2016 employee plans and the 2003 and 2013 directors' plans. In applying the “two-class” method, undistributed earnings are allocated to both common shares and participating securities. The following is a reconciliation of Registrant’s net income and weighted average Common Shares outstanding for calculating basic net income per share: Basic: For The Years Ended December 31, (in thousands, except per share amounts) 2021 2020 2019 Net income $ 94,347 $ 86,425 $ 84,342 Less: (a) Distributed earnings to common shareholders 51,689 47,206 42,702 Distributed earnings to participating securities 134 158 180 Undistributed earnings 42,524 39,061 41,460 (b) Undistributed earnings allocated to common shareholders 42,414 38,930 41,285 Undistributed earnings allocated to participating securities 110 131 175 Total income available to common shareholders, basic (a)+(b) $ 94,103 $ 86,136 $ 83,987 Weighted average Common Shares outstanding, basic 36,921 36,880 36,814 Basic earnings per Common Share $ 2.55 $ 2.34 $ 2.28 Diluted EPS is based upon the weighted average number of Common Shares, including both outstanding shares and shares potentially issuable in connection with restricted stock units granted under AWR’s 2016 employee plans, and the 2003 and 2013 directors' plans, and net income. At December 31, 2021, there were also 100,020 restricted stock units outstanding, including performance shares awarded to officers of the Registrant. The following is a reconciliation of Registrant’s net income and weighted average Common Shares outstanding for calculating diluted net income per share: Diluted: For The Years Ended December 31, (in thousands, except per share amounts) 2021 2020 2019 Common shareholders earnings, basic $ 94,103 $ 86,136 $ 83,987 Undistributed earnings for dilutive stock options and restricted stock units 110 131 175 Total common shareholders earnings, diluted $ 94,213 $ 86,267 $ 84,162 Weighted average Common Shares outstanding, basic 36,921 36,880 36,814 Stock-based compensation (1) 89 115 150 Weighted average Common Shares outstanding, diluted 37,010 36,995 36,964 Diluted earnings per Common Share $ 2.55 $ 2.33 $ 2.28 (1) In applying the treasury stock method of reflecting the dilutive effect of outstanding stock-based compensation in the calculation of diluted EPS, 100,020 restricted stock units, including performance awards, at December 31, 2021 were deemed to be outstanding in accordance with accounting guidance on earnings per share. During the years ended December 31, 2021, 2020 and 2019, AWR issued Common Shares totaling 47,182, 42,489 and 88,772, respectively, under AWR's employee stock incentive plans and the non-employee directors' plans. In addition, during the years 2020 and 2019, AWR issued 1,800 and 30,998 Common Shares for approximately $30,000 and $519,000, respectively, as a result of the exercise of stock options. No shares were issued during 2021 as a result of the exercise of stock options. During 2021, 2020 and 2019, no cash proceeds received by AWR as a result of the exercise of stock options were distributed to any of AWR's subsidiaries. AWR has not issued any Common Shares during 2021, 2020 and 2019 under AWR's Common Share Purchase and Dividend Reinvestment Plan ("DRP") and the 401(k) Plan. Shares reserved for the 401(k) Plan are in relation to AWR’s matching contributions and investment by participants. As of December 31, 2021, there were 1,055,948 and 387,300 Common Shares authorized for issuance directly by AWR but unissued under the DRP and the 401(k) Plan, respectively. During 2020, GSWC issued five Common Shares to AWR for $60 million. The majority of the proceeds from these stock issuances were used by GSWC to pay down its intercompany borrowings from AWR. The CPUC requires GSWC to pay down all intercompany borrowings from AWR within a 24-month period. No shares were issued by GSWC during 2021 and 2019. During the years ended December 31, 2021, 2020 and 2019, AWR and GSWC made payments to taxing authorities on employees' behalf for shares withheld related to net share settlements. These payments are included in the stock-based compensation caption of the statements of equity. GSWC’s outstanding common shares are owned entirely by its parent, AWR. To the extent GSWC does not reimburse AWR for stock-based compensation awarded under various stock compensation plans, such amounts increase the value of GSWC’s common shareholder’s equity.

Dividend Limitations

Dividend Limitations	12 Months Ended
Dividend Limitations	Dec. 31, 2021
Disclosure of Restrictions on Dividends, Loans and Advances Disclosure [Abstract]
Dividend Limitations	Dividend LimitationsGSWC is prohibited from paying dividends if, after giving effect to the dividend, its total indebtedness to capitalization ratio (as defined) would be more than 0.6667-to-1. Dividends in the amount of $38.3 million, $22.5 million and $20.2 million were paid to AWR by GSWC during the years 2021, 2020 and 2019, respectively. The ability of AWR, GSWC, BVESI and ASUS to pay dividends is also restricted by California law. Under California law, AWR, GSWC, BVESI and ASUS are each permitted to distribute dividends to its shareholders so long as the Board of Directors determines, in good faith, that either: (i) the value of the corporation’s assets equals or exceeds the sum of its total liabilities immediately after the dividend, or (ii) its retained earnings equals or exceeds the amount of the distribution. Under the least restrictive of the California tests, approximately $685.9 million was available to pay dividends to AWR’s shareholders at December 31, 2021. Approximately $615.7 million was available for GSWC to pay dividends to AWR at December 31, 2021.

Bank Debt

Bank Debt	12 Months Ended
Bank Debt	Dec. 31, 2021
Bank Debt
Bank Debt	Bank Debt AWR has access to a $200.0 million credit facility expiring in May 2023 in order to provide funds to GSWC and ASUS in support of their operations on terms that are similar to that of the credit facility. At December 31, 2021, there was $174.5 million outstanding under the credit facility. The aggregate effective amount that may be outstanding under letters of credit is $25.0 million. AWR has obtained letters of credit for AWR and GSWC, in the aggregate amount of $455,000 at fees of 0.65%. Letters of credit outstanding reduce the amount that may be borrowed under the revolving credit facility. AWR is not required to maintain any compensating balances. Loans may be obtained under this credit facility at the option of AWR and bear interest at rates based on credit ratings and LIBOR benchmark replacement rate margins. In March 2021, Standard and Poor’s Global Ratings (“S&P”) affirmed an A+ credit rating for both AWR and GSWC. S&P also revised its rating outlook to negative from stable for both companies. S&P’s debt ratings range from AAA (highest possible) to D (obligation is in default). In November 2021, Moody's Investors Service ("Moody's") affirmed its A2 rating with a stable outlook for GSWC. BVESI has access to a $35.0 million revolving credit facility, which was amended in December 2021 to reduce the interest rate and fees, as well as extend the maturity date by a year to July 1, 2024. As of December 31, 2021, there was $31.0 million outstanding under this facility. Borrowings made under this facility support the electric segment's operations and capital expenditures. Under the terms of the credit agreement, BVESI has the option to increase in the facility by an additional $15 million, subject to lender approval. BVESI’s revolving credit facility is considered a short-term debt arrangement by the CPUC. BVESI has been authorized by the CPUC to borrow under this credit facility for a term of up to 24 months. Borrowings under this credit facility are, therefore, required to be fully paid off within a 24-month period. BVESI’s pay-off period for its credit facility ends in July 2022. Accordingly, the $31.0 million outstanding under BVESI's credit facility has been classified as a current liability in AWR's Consolidated Balance Sheet as of December 31, 2021. Registrant’s borrowing activities (excluding letters of credit) for the years ended December 31, 2021 and 2020 were as follows: December 31, (in thousands, except percent) 2021 2020 Balance Outstanding at December 31, $ 205,500 $ 134,200 Interest Rate at December 31, 0.78% ~ 1.61% 1.19% ~ 1.90% Average Amount Outstanding $ 165,167 $ 162,995 Weighted Average Annual Interest Rate 1.05 % 1.47 % Maximum Amount Outstanding $ 205,500 $ 249,200 All of the letters of credit are issued pursuant to AWR's revolving credit facility. The revolving credit facility contains restrictions on prepayments, disposition of property, mergers, liens and negative pledges, indebtedness and guaranty obligations, transactions with affiliates, minimum interest coverage requirements, a maximum debt to capitalization ratio and a minimum debt rating. Pursuant to the credit agreement, AWR must maintain a minimum interest coverage ratio of 3.25 times interest expense, a maximum total funded debt ratio of 0.65 to 1.00 and a minimum Moody’s Investor Service or S&P debt rating of Baa3 or BBB-, respectively. As of December 31, 2021, 2020 and 2019, AWR was in compliance with these requirements. As of December 31, 2021, AWR had an interest coverage ratio of 8.21 times interest expense, a debt ratio of 0.47 to 1.00 and a debt rating of A+ by S&P. Pursuant to BVESI's credit facility agreement, BVESI must maintain a minimum interest coverage ratio of 4.5 times interest expense and a maximum consolidated total debt to consolidated total capitalization ratio of 0.65 to 1.00. As of December 31, 2021 and 2020, BVESI was in compliance with these requirements, with an actual interest coverage ratio of 58.6 times interest expense and a total funded debt ratio of 0.30 to 1.00 as of December 31, 2021. In addition, BVESI is required to have a current safety certification issued by the CPUC, which it currently has.

Long-Term Debt

Long-Term Debt	12 Months Ended
Long-Term Debt	Dec. 31, 2021
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt Registrant’s long-term debt consists of notes and debentures of GSWC. Registrant summarizes its long-term debt in the Statements of Capitalization. GSWC does not currently have any outstanding mortgages or other encumbrances on its properties. On May 24, 2021, GSWC redeemed its 9.56% private placement notes in the amount of $28 million, which pursuant to the note agreement included a redemption premium of 3.0% on par value, or $840,000. GSWC recovers redemption premiums in its embedded cost of debt as filed in cost of capital proceedings where the cost savings from redeeming higher interest rate debt are passed on to customers. Accordingly, the redemption premium has been deferred as a regulatory asset. GSWC funded the redemption by borrowing from AWR parent. AWR, in turn, funded this borrowing from its revolving credit facility. In 2020, GSWC issued unsecured private placement notes totaling $160.0 million. In connection with this financing, GSWC issued (i) $85.0 million aggregate principal amount of Series A Senior Notes at a coupon rate of 2.17% due July 8, 2030, and (ii) $75.0 million aggregate principal amount of Series B Senior Notes at a coupon rate of 2.90% due July 8, 2040. Interest on the Notes is payable semiannually. The Notes are unsecured and rank equally with GSWC’s unsecured and unsubordinated debt. GSWC may, at its option, redeem all or portions of the Notes at any time upon written notice, subject to payment of a make-whole premium based on 50 basis points above the applicable treasury yield. The make-whole premiums and covenant requirements under these notes are similar to the terms of the $15.0 million 3.45% senior private placement notes due in 2029 and the $40.0 million 5.87% senior private placement notes due in 2028. Pursuant to the terms of each of these notes, GSWC must maintain a total indebtedness to capitalization ratio (as defined) of less than 0.6667-to-1 and a total indebtedness to earnings before income taxes, depreciation and amortization ("EBITDA") of less than 8-to-1. As of December 31, 2021, GSWC had a total indebtedness to capitalization ratio of 0.4288-to-1 and a total indebtedness to EBITDA of 3.2-to-1. In October 2009, GSWC entered into an agreement with the California Department of Public Health (“CDPH”) whereby CDPH agreed to provide funds to GSWC of up to $9.0 million under the American Recovery and Reinvestment Act. Proceeds from the funds received were used to reimburse GSWC for capital costs incurred to install water meters to convert customers in GSWC’s Arden-Cordova district from non-metered service to metered service. GSWC received a total of $8.6 million in reimbursements from the CDPH, half of which was recorded as a contribution in aid of construction and the other half as long-term debt in accordance with the terms of the agreement. The loan portion bears interest at a rate of 2.5% and is payable over 20 years beginning in 2013. A surcharge to recover from customers the debt service cost on this loan was approved by the CPUC and implemented in 2013. Annual maturities of all long-term debt at December 31, 2021 are as follows (in thousands): 2022 $ 377 2023 400 2024 421 2025 441 2026 460 Thereafter 413,689 Total $ 415,788

Taxes on Income

Taxes on Income	12 Months Ended
Taxes on Income	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Taxes on Income	Taxes on Income Registrant records deferred income taxes for temporary differences pursuant to the accounting guidance that addresses items recognized for income tax purposes in a different period from when these items are reported in the financial statements. These items include differences in net asset basis (primarily related to differences in depreciation lives and methods, and differences in capitalization methods) and the treatment of certain regulatory balancing accounts and construction contributions and advances. The accounting guidance for income taxes requires that rate-regulated enterprises record deferred income taxes and offsetting regulatory liabilities and assets for temporary differences where the rate regulator has prescribed flow-through treatment for ratemaking purposes (Note 3). Deferred investment tax credits (“ITC”) are amortized ratably to deferred tax expense over the remaining lives of the property that gave rise to these credits. GSWC is included in both AWR’s consolidated federal income tax and its combined California state franchise tax returns. The impact of California’s unitary apportionment on the amount of AWR’s California income tax liability is a function of both the profitability of AWR’s non-California activities and the proportion of AWR’s California sales to its total sales. GSWC’s income tax expense is computed as if GSWC were autonomous and separately files its income tax returns, which is consistent with the method adopted by the CPUC in setting GSWC’s customer rates. On November 15, 2021, the Infrastructure Investment and Jobs Act (“IIJA”) was signed into federal law. Among its significant provisions, IIJA restores, on a retroactive basis to January 1, 2021, the provision that treats contributions in aid of construction provided to regulated water utilities as non-taxable, which TCJA had repealed. Further, IIJA broadens the provision to also treat government grants for water infrastructure as non-taxable. The significant components of the deferred tax assets and liabilities as reflected in the balance sheets at December 31, 2021 and 2020 are: AWR GSWC December 31, December 31, (dollars in thousands) 2021 2020 2021 2020 Deferred tax assets: Regulatory-liability-related (1) $ 32,220 $ 32,640 $ 30,410 $ 30,782 Contributions and advances 6,850 6,390 7,227 6,771 Other 5,324 6,092 5,689 6,663 Total deferred tax assets $ 44,394 $ 45,122 $ 43,326 $ 44,216 Deferred tax liabilities: Fixed assets $ (150,290) $ (146,688) $ (144,719) $ (141,422) Regulatory-asset-related: depreciation and other (25,914) (22,205) (24,858) (21,060) Balancing and memorandum accounts (non-flow-through) (8,480) (7,401) (6,063) (6,315) Total deferred tax liabilities (184,684) (176,294) (175,640) (168,797) Accumulated deferred income taxes, net $ (140,290) $ (131,172) $ (132,314) $ (124,581) (1) Primarily represents the gross-up portion of the deferred income tax (on the excess-deferred-tax regulatory liability) brought about by TCJA’s reduction in the federal income tax rate. The current and deferred components of income tax expense are as follows: AWR Year Ended December 31, (dollars in thousands) 2021 2020 2019 Current Federal $ 19,592 $ 19,240 $ 12,507 State 7,270 6,714 5,540 Total current tax expense $ 26,862 $ 25,954 $ 18,047 Deferred Federal $ 2,802 $ 1,814 $ 6,407 State 759 429 216 Total deferred tax (benefit) expense 3,561 2,243 6,623 Total income tax expense $ 30,423 $ 28,197 $ 24,670 GSWC Year Ended December 31, (dollars in thousands) 2021 2020 2019 Current Federal $ 13,698 $ 14,674 $ 9,616 State 6,089 5,849 5,480 Total current tax expense $ 19,787 $ 20,523 $ 15,096 Deferred Federal $ 2,251 $ 949 $ 4,924 State 57 232 157 Total deferred tax (benefit) expense 2,308 1,181 5,081 Total income tax expense $ 22,095 $ 21,704 $ 20,177 The differences between AWR’s and GSWC’s effective tax rates and the federal statutory rate are mostly attributable to (i) state taxes; (ii) permanent differences including the excess tax benefits from share-based payments, which are reflected in the income statements and reduced income tax expense; (iii) continuing amortization of the excess deferred income tax liability, and (iv) differences between book and taxable income that are treated as flow-through adjustments in accordance with regulatory requirements (principally from plant, rate-case, and compensation expenses). As a regulated utility, GSWC treats certain temporary differences as flow-through in computing its income tax expense consistent with the income tax method used in its CPUC-jurisdictional ratemaking. Flow-through items either increase or decrease tax expense and thus impact the ETR. The reconciliations of the effective tax rates to the federal statutory rate are as follows: AWR Year Ended December 31, (dollars in thousands) 2021 2020 2019 Federal taxes on pretax income at statutory rate $ 26,202 $ 24,071 $ 22,872 Increase (decrease) in taxes resulting from: State income tax, net of federal benefit 6,425 5,764 4,758 Excess deferred tax amortization (1,356) (1,550) (1,579) Flow-through on fixed assets 1,069 1,056 1,244 Flow-through on removal costs (1,962) (1,031) (1,582) Investment tax credit (71) (71) (71) Other – net 116 (42) (972) Total income tax expense from operations $ 30,423 $ 28,197 $ 24,670 Pretax income from operations $ 124,770 $ 114,622 $ 109,012 Effective income tax rate 24.4 % 24.6 % 22.6 % . GSWC Year Ended December 31, (dollars in thousands) 2021 2020 2019 Federal taxes on pretax income at statutory rate $ 19,175 $ 18,202 $ 18,236 Increase (decrease) in taxes resulting from: State income tax, net of federal benefit 4,923 4,920 4,656 Excess deferred tax amortization (1,184) (1,477) (1,579) Flow-through on fixed assets 1,008 1,042 1,244 Flow-through on removal costs (1,954) (1,026) (1,582) Investment tax credit (71) (71) (71) Other – net 198 114 (727) Total income tax expense from operations $ 22,095 $ 21,704 $ 20,177 Pretax income from operations $ 91,310 $ 86,675 $ 86,840 Effective income tax rate 24.2 % 25.0 % 23.2 % AWR and GSWC had no unrecognized tax benefits at December 31, 2021, 2020 and 2019. Registrant’s policy is to classify interest on income tax over/underpayments in interest income/expense and penalties in “other operating expenses.” Registrant did not have any material interest receivables/payables from/to taxing authorities as of December 31, 2021 and 2020, nor did it recognize any material interest income/expense or accrue any material tax-related penalties during the years ended December 31, 2021, 2020 and 2019. Registrant files federal, California and various other state income tax returns. AWR's 2018—2020 tax years remain subject to examination by the Internal Revenue Service. AWR filed refund claims with the California Franchise Tax Board ("FTB") for the 2005 through 2008 and 2011 through 2016 tax years in connection with the matters reflected on prior federal refund claims along with other state tax items. The FTB continues to review the claims, and the 2009, 2010, and 2017—2020 tax years remain subject to examination by the FTB.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
Employee Benefit Plans	Dec. 31, 2021
Retirement Benefits [Abstract]
Employee Benefit Plans	Employee Benefit Plans Pension and Post-Retirement Medical Plans : Registrant maintains a defined benefit pension plan (the “Pension Plan”) that provides eligible employees (those aged 21 and older, hired before January 1, 2011) monthly benefits upon retirement based on average salaries and length of service. The eligibility requirement to begin receiving these benefits is 5 years of vested service. The normal retirement benefit is equal to 2% of the 5 highest consecutive years’ average earnings multiplied by the number of years of credited service, up to a maximum of 40, reduced by a percentage of primary Social Security benefits. There is also an early retirement option. Annual contributions are made to the Pension Plan, which comply with the funding requirements of the Employee Retirement Income Security Act (“ERISA”). At December 31, 2021, Registrant had 918 participants in the Pension Plan. Employees hired or rehired after December 31, 2010 are eligible to participate in a defined contribution plan. Registrant's existing 401(k) Investment Incentive Program was amended to include this defined contribution plan. Under this plan, Registrant provides a contribution ranging from 3% to 5.25% of eligible pay each pay period into investment vehicles offered by the plan’s trustee. Full vesting under this plan occurs upon 3 years of service. Employees hired before January 1, 2011 continue to participate in and accrue benefits under the terms of the Pension Plan. Registrant also provides post-retirement medical benefits for all active employees hired before February of 1995 through a medical insurance plan. Eligible employees, who retire prior to age 65, and/or their spouses, are able to retain the benefits under the plan for active employees until reaching age 65. Eligible employees upon reaching age 65, and those eligible employees retiring at or after age 65, and/or their spouses, receive coverage through a Medicare supplement insurance policy paid for by Registrant subject to an annual cap limit. Registrant’s post-retirement medical plan does not provide prescription drug benefits to Medicare-eligible employees and is not affected by the Medicare Prescription Drug Improvement and Modernization Act of 2003. In accordance with the accounting guidance for the effects of certain types of regulation, Registrant has established a regulatory asset for its underfunded position in its pension and post-retirement medical plans that is expected to be recovered through rates in future periods. The changes in actuarial gains and losses, prior service costs and transition assets or obligations pertaining to the regulatory asset are recognized as an adjustment to the regulatory asset account as these amounts are recognized as components of net periodic pension cost each year and in the rate-making process. The following table sets forth the Pension Plan’s and post-retirement medical plan’s funded status and amounts recognized in Registrant’s balance sheets and the components of net pension cost and accrued liability at December 31, 2021 and 2020: Pension Benefits Post-Retirement Medical (dollars in thousands) 2021 2020 2021 2020 Change in Projected Benefit Obligation: Projected benefit obligation at beginning of year $ 272,786 $ 231,852 $ 5,906 $ 7,395 Service cost 6,316 5,558 149 171 Interest cost 6,833 7,880 110 208 Actuarial (gain) loss (17,682) 35,453 (3,165) (1,604) Benefits/expenses paid (8,502) (7,957) (314) (264) Projected benefit obligation at end of year $ 259,751 $ 272,786 $ 2,686 $ 5,906 Changes in Plan Assets: Fair value of plan assets at beginning of year $ 213,147 $ 192,477 $ 12,313 $ 11,271 Actual return on plan assets 25,390 24,909 1,773 1,307 Employer contributions 3,489 3,718 242 269 Benefits/expenses paid (8,502) (7,957) (555) (534) Fair value of plan assets at end of year $ 233,524 $ 213,147 $ 13,773 $ 12,313 Funded Status: Net amount recognized as accrued pension cost $ (26,227) $ (59,639) $ 11,087 $ 6,407 The decrease in the underfunded status of the pension was due to an increase in the discount rate, which increased from 2.55% as of December 31, 2020 to 2.89% as of December 31, 2021, as well as improved asset performance. Pension Benefits Post-Retirement (dollars in thousands) 2021 2020 2021 2020 Amounts recognized on the balance sheets: Non-current assets $ — $ — $ 11,087 $ 6,407 Current liabilities — — — — Non-current liabilities (26,227) (59,639) — — Net amount recognized $ (26,227) $ (59,639) $ 11,087 $ 6,407 Amounts recognized in regulatory assets consist of: Prior service cost (credit) $ 2,323 $ 2,757 $ — $ — Net (gain) loss 23,368 57,716 (9,839) (6,855) Regulatory assets (liabilities) 25,691 60,473 (9,839) (6,855) Unfunded accrued pension cost 536 (834) (1,248) 448 Net liability (asset) recognized $ 26,227 $ 59,639 $ (11,087) $ (6,407) Changes in plan assets and benefit obligations recognized in regulatory assets: Regulatory asset at beginning of year $ 60,473 $ 40,500 $ (6,855) $ (5,432) Net loss (gain) (30,531) 22,343 (4,401) (2,400) New prior service cost — — — — Amortization of prior service (cost) credit (434) (435) — — Amortization of net gain (loss) (3,817) (1,935) 1,417 977 Total change in regulatory asset (34,782) 19,973 (2,984) (1,423) Regulatory asset (liability) at end of year $ 25,691 $ 60,473 $ (9,839) $ (6,855) Net periodic pension costs $ 4,859 $ 4,010 $ (1,695) $ (1,108) Change in regulatory asset (34,782) 19,973 (2,984) (1,423) Total recognized in net periodic pension cost and regulatory asset (liability) $ (29,923) $ 23,983 $ (4,679) $ (2,531) Additional year-end information for plans with an accumulated benefit obligation in excess of plan assets: Projected benefit obligation $ 259,751 $ 272,786 $ 2,686 $ 5,906 Accumulated benefit obligation $ 243,412 $ 253,108 N/A N/A Fair value of plan assets $ 233,524 $ 213,147 $ 13,773 $ 12,313 Weighted-average assumptions used to determine benefit obligations at December 31: Discount rate 2.89 % 2.55 % 2.46 % 2.20 % Rate of compensation increase * * N/A N/A • Age-graded ranging from 3.0% to 8.0%. The components of net periodic pension and post-retirement benefits cost, before allocation to the overhead pool, for 2021, 2020 and 2019 are as follows: Pension Benefits Post-Retirement (dollars in thousands, except percent) 2021 2020 2019 2021 2020 2019 Components of Net Periodic Benefits Cost: Service cost $ 6,316 $ 5,558 $ 4,441 $ 149 $ 171 $ 186 Interest cost 6,833 7,880 8,527 110 208 285 Expected return on plan assets (12,541) (11,798) (10,374) (537) (510) (449) Amortization of prior service cost (credit) 434 435 434 — — — Amortization of actuarial (gain) loss 3,817 1,935 1,419 (1,417) (977) (801) Net periodic pension cost under accounting standards $ 4,859 $ 4,010 $ 4,447 $ (1,695) $ (1,108) $ (779) Regulatory adjustment (1,277) (483) (593) — — — Total expense recognized, before surcharges and allocation to overhead pool $ 3,582 $ 3,527 $ 3,854 $ (1,695) $ (1,108) $ (779) Weighted-average assumptions used to determine net periodic cost: Discount rate 2.55 % 3.43 % 4.43 % 2.20 % 3.12 % 4.20 % Expected long-term return on plan assets 6.00 % 6.25 % 6.50 % * * * Rate of compensation increase ** N/A N/A N/A 5.75% for union plan and 4.0% for non-union (net of income taxes) in 2021, and 6.0% for union plan and 4.2% for non-union (net of income taxes) in 2020 and 2019. * Age-graded ranging from 3.0% to 8.0%. Regulatory Adjustment : The CPUC authorized GSWC and BVESI to track differences between the forecasted annual pension expenses adopted in rates and the actual annual expenses to be recorded in accordance with the accounting guidance for pension costs in a two-way pension balancing account. During the years ended December 31, 2021, 2020 and 2019, GSWC's actual expense was higher than the amounts included in customer rates by $1.3 million, $483,000 and $593,000, respectively. The cumulative amount recorded in GSWC's two-way pension balancing account is included within the pensions and other post-retirement obligations regulatory asset discussed in Note 3. During the years ended December 31, 2021, 2020 and 2019, BVESI's actual expense was lower than the amounts included in electric rates by $246,000, $200,000 and $205,000, respectively. These over-collections were recorded as a reduction to electric revenues. Plan Funded Status : The Pension Plan was underfunded at December 31, 2021 and 2020. Registrant’s market related value of plan assets is equal to the fair value of plan assets. Past volatile market conditions have affected the value of GSWC’s trust established to fund its future long-term pension benefits. These benefit plan assets and related obligations are measured annually using a December 31 measurement date. Changes in the Pension Plan’s funded status will affect the assets and liabilities recorded on the balance sheet in accordance with accounting guidance on employers’ accounting for defined benefit pension and other post-retirement plans. Due to Registrant’s regulatory recovery treatment, the recognition of the underfunded status for the Pension Plan has been offset by a regulatory asset pursuant to guidance on the accounting for the effects of certain types of regulation. Plan Assets : The assets of the pension and post-retirement medical plans are managed by a third party trustee. The investment policy allocation of the assets in the trust was approved by Registrant’s Administrative Committee (the “Committee”) for the pension and post-retirement medical funds, which has oversight responsibility for all retirement plans. The primary objectives underlying the investment of the pension and post-retirement plan assets are: (i) attempt to maintain a fully funded status with a cushion for unexpected developments, possible future increases in expense levels and/or a reduction in the expected return on investments; (ii) seek to earn long-term returns that compare favorably to appropriate market indexes, peer group universes and the policy asset allocation index; (iii) seek to provide sufficient liquidity to pay current benefits and expenses; (iv) attempt to limit risk exposure through prudent diversification; and (v) seek to limit costs of administering and managing the plans. The Committee recognizes that risk and volatility are present to some degree with all types of investments. High levels of risk may be avoided through diversification by asset class, style of each investment manager and sector and industry limits. Investment managers are retained to manage a pool of assets and allocate funds in order to achieve an appropriate, diversified and balanced asset mix. The Committee’s strategy balances the requirement to maximize returns using potentially higher-return generating assets, such as equity securities, with the need to control the risk of its benefit obligations with less volatile assets, such as fixed-income securities. The Committee approves the target asset allocations. Registrant’s pension and post-retirement plan weighted-average asset allocations at December 31, 2021 and 2020, by asset category are as follows: Pension Benefits Post-Retirement Asset Category 2021 2020 2021 2020 Actual Asset Allocations : Equity securities 56 % 59 % 60 % 63 % Debt securities 38 % 36 % 39 % 36 % Real Estate Funds 6 % 5 % — % — % Cash equivalents — % — % 1 % 1 % Total 100 % 100 % 100 % 100 % Equity securities did not include AWR’s Common Shares as of December 31, 2021 and 2020. Target Asset Allocations: Pension Benefits Post-retirement Equity securities 60 % 60 % Debt securities 40 % 40 % Total 100 % 100 % The Pension Plan assets are in collective trust funds managed by a management firm appointed by the Committee. The fair value of these collective trust funds is measured using net asset value per share. In accordance with ASU 2015-07 Disclosures for Investments in Certain Entities that Calculate Net Asset Value per Share (or Its Equivalents) , the fair value of the collective trust funds is not categorized in the fair value hierarchy as of December 31, 2021 and 2020. The following tables set forth the fair value, measured by net asset value, of the pension investment assets as of December 31, 2021 and 2020: Net Asset Value as of December 31, 2021 (dollars in thousands) Fair Value Unfunded Commitments Redemption Frequency Redemption Notice Period Cash equivalents $ 637 — N/A N/A Fixed income fund 87,760 — Daily Daily Equity securities : U.S. small/mid cap funds 58,451 — Daily Daily U.S. large cap funds 22,143 — Daily Daily International funds 50,961 — Daily Daily Total equity funds 131,555 — Real estate funds 13,572 — Daily Daily Total $ 233,524 — Net Asset Value as of December 31, 2020 (dollars in thousands) Fair Value Unfunded Commitments Redemption Frequency Redemption Notice Period Cash equivalents $ 589 — N/A N/A Fixed income fund 76,221 — Daily Daily Equity securities : U.S. small/mid cap funds 21,837 — Daily Daily U.S. large cap funds 53,677 — Daily Daily International funds 50,488 — Daily Daily Total equity funds 126,002 Real estate funds 10,335 — Daily Daily Total $ 213,147 — The collective trust funds may be invested or redeemed daily, and generally do not have any significant restrictions to redeem the investments. As previously discussed in Note 1, the accounting guidance for fair value measurements establishes a framework for measuring fair value and requires fair value measurements to be classified and disclosed in one of three levels. As required by the accounting guidance, assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. All equity investments in the post-retirement medical plan are Level 1 investments in mutual funds. The fixed income category includes corporate bonds and notes. The majority of fixed income investments range in maturities from less than 1 to 20 years. The fair values of these investments are based on quoted market prices in active markets. The following tables set forth by level, within the fair value hierarchy, the post-retirement plan's investment assets measured at fair value as of December 31, 2021 and 2020: Fair Value as of December 31, 2021 (dollars in thousands) Level 1 Level 2 Level 3 Total Fair Value of Post-Retirement Plan Assets: Cash equivalents $ 92 — — $ 92 Fixed income 5,409 — — 5,409 U.S. equity securities 8,272 — — 8,272 Total investments measured at fair value $ 13,773 — — $ 13,773 Fair Value as of December 31, 2020 (dollars in thousands) Level 1 Level 2 Level 3 Total Fair Value of Post-Retirement Plan Assets: Cash equivalents $ 169 — — $ 169 Fixed income 4,436 — — 4,436 U.S. equity securities 7,707 — — 7,707 Total investments measured at fair value $ 12,312 — — $ 12,312 Plan Contributions : During 2021, Registrant contributed $3.5 million to its pension plan and did not make a contribution to the post-retirement medical plan. Registrant expects to contribute approximately $3.1 million to its pension plan in 2022. Registrant’s policy is to fund the plans annually at a level which is deductible for income tax purposes and is consistent with amounts recovered in customer rates while also complying with ERISA's funding requirements. Benefit Payments : Estimated future benefit payments at December 31, 2021 for the next five years and thereafter are as follows (in thousands): Pension Benefits Post-Retirement Medical Benefits 2022 $ 8,983 $ 327 2023 9,598 314 2024 10,347 292 2025 10,844 285 2026 11,280 260 Thereafter 64,368 869 Total $ 115,420 $ 2,347 Assumptions : Certain actuarial assumptions, such as the discount rate, long-term rate of return on plan assets, mortality, and the healthcare cost trend rate have a significant effect on the amounts reported for net periodic benefit cost as well as the related benefit obligation amounts. Discount Rate — The assumed discount rate for pension and post-retirement medical plans reflects the market rates for high-quality corporate bonds currently available. Registrant’s discount rates were determined by considering the average of pension yield curves constructed of a large population of high quality corporate bonds. The resulting discount rate reflects the matching of plan liability cash flows to the yield curves. Expected Long-Term Rate of Return on Assets — The long-term rate of return on plan assets represents an estimate of long-term returns on an investment portfolio consisting of a mixture of equities, fixed income and other investments. To develop the expected long-term rate of return on assets assumption for the pension plan, Registrant considered the historical returns and the future expectations for returns for each asset class, as well as the target asset allocation of the pension portfolio. Registrant’s policy is to fund the medical benefit trusts based on actuarially determined amounts as allowed in rates approved by the CPUC. Registrant has invested the funds in the post-retirement trusts that are intended to achieve a desired return and minimize amounts necessary to recover through rates. The mix is expected to provide for a return on assets similar to the Pension Plan and to achieve Registrant’s targeted allocation. This resulted in the selection of the 5.75% long-term rate of return on assets assumption for the union plan and 4.0% (net of income taxes) for the non-union plan portion of the post-retirement plan. Mortality — Mortality assumptions are a critical component of benefit obligation amounts and a key factor in determining the expected length of time for annuity payments. Registrant uses the latest mortality tables published by the Society of Actuaries. Accordingly, the benefit obligation amounts as of December 31, 2021 and 2020 have incorporated recent updates to the mortality tables. Healthcare Cost Trend Rate — The assumed health care cost trend rate for 2022 starts at 5.2% grading down to 4.3% in 2037 for those under age 65, and at 5.2% grading down to 4.3% in 2025 for those 65 and over. Assumed health care cost trend rates have a significant effect on the amounts reported for the health care plans. Supplemental Executive Retirement Plan : Registrant has a supplemental executive retirement plan (“SERP”) that is intended to restore retirement benefits to certain key employees and officers of Registrant that are limited by Sections 415 and 401(a)(17) of the Internal Revenue Code of 1986, as amended. The Board of Directors approved the establishment of a Rabbi Trust created for the SERP. Assets in a Rabbi Trust can be subject to the claims of creditors; therefore, they are not considered as an asset for purposes of computing the SERP’s funded status. As of December 31, 2021, the balance in the Rabbi Trust totaled $31.5 million and is included in Registrant’s other property and investments. All equity investments in the Rabbi Trust are Level 1 investments in mutual funds. The fixed income category includes corporate bonds and notes. The fair values of these investments are based on quoted market prices in active markets. The following tables set forth by level, within the fair value hierarchy, the Rabbi Trust investment assets measured at fair value as of December 31, 2021 and 2020: Fair Value as of December 31, 2021 (dollars in thousands) Level 1 Level 2 Level 3 Total Fair Value of Assets held in Rabbi Trust: Cash equivalents $ 8 — — $ 8 Fixed income securities 12,442 — — 12,442 Equity securities 19,018 — — 19,018 Total investments measured at fair value $ 31,468 — — $ 31,468 Fair Value as of December 31, 2020 (dollars in thousands) Level 1 Level 2 Level 3 Total Fair Value of Assets held in Rabbi Trust: Cash equivalents $ 8 — — $ 8 Fixed income securities 10,201 — — 10,201 Equity securities 15,703 — — 15,703 Total investments measured at fair value $ 25,912 — — $ 25,912 The following provides a reconciliation of benefit obligations, funded status of the SERP, as well as a summary of significant estimates at December 31, 2021 and 2020: (dollars in thousands) 2021 2020 Change in Benefit Obligation: Benefit obligation at beginning of year $ 36,602 $ 29,703 Service cost 1,392 1,029 Interest cost 915 988 Actuarial (gain) loss (2,213) 5,479 Benefits paid (607) (597) Benefit obligation at end of year $ 36,089 $ 36,602 Changes in Plan Assets: Fair value of plan assets at beginning and end of year — — Funded Status: Net amount recognized as accrued cost $ (36,089) $ (36,602) (in thousands) 2021 2020 Amounts recognized on the balance sheets: Current liabilities $ (949) $ (602) Non-current liabilities (35,140) (36,000) Net amount recognized $ (36,089) $ (36,602) Amounts recognized in regulatory assets consist of: Prior service cost $ — $ — Net loss 9,097 12,988 Regulatory assets 9,097 12,988 Unfunded accrued cost 26,992 23,614 Net liability recognized $ 36,089 $ 36,602 Changes in plan assets and benefit obligations recognized in regulatory assets consist of: Regulatory asset at beginning of year $ 12,988 $ 8,352 Net (gain) loss (2,213) 5,479 Amortization of prior service credit — — Amortization of net loss (1,678) (843) Total change in regulatory asset (3,891) 4,636 Regulatory asset at end of year $ 9,097 $ 12,988 Net periodic pension cost $ 3,985 $ 2,860 Change in regulatory asset (3,891) 4,636 Total recognized in net periodic pension and regulatory asset $ 94 $ 7,496 Additional year-end information for plans with an accumulated benefit obligation in excess of plan assets: Projected benefit obligation $ 36,089 $ 36,602 Accumulated benefit obligation 31,835 30,428 Fair value of plan assets — — Weighted-average assumptions used to determine benefit obligations: Discount rate 2.87 % 2.52 % Rate of compensation increase * 4.00 % * Age graded from 4.5% to 4.0% per year. The components of SERP expense, before allocation to the overhead pool, for 2021, 2020 and 2019 are as follows: (dollars in thousands, except percent) 2021 2020 2019 Components of Net Periodic Benefits Cost: Service cost $ 1,392 $ 1,029 $ 1,193 Interest cost 915 988 1,069 Amortization of prior service cost — — — Amortization of net loss 1,678 843 471 Net periodic pension cost $ 3,985 $ 2,860 $ 2,733 Weighted-average assumptions used to determine net periodic cost: Discount rate 2.52 % 3.36 % 4.40 % Rate of compensation increase * 4.00 % 4.00 % * Age graded from 4.5% to 4.0% per year. Benefit Payments : Estimated future benefit payments for the SERP at December 31, 2021 for the next five years and thereafter are as follows (in thousands): 2022 $ 949 2023 944 2024 1,195 2025 1,187 2026 2,154 Thereafter 11,444 Total $ 17,873 401(k) Investment Incentive Program : Registrant has a 401(k) Investment Incentive Program under which employees may invest a percentage of their pay, up to a maximum investment prescribed by law, in an investment program managed by an outside investment manager. Registrant’s cash contributions to the 401(k) are based upon a percentage of individual employee contributions and for the years ended December 31, 2021, 2020 and 2019 were $2.7 million, $2.7 million and $2.5 million, respectively. The Investment Incentive Program also incorporates the defined contribution plan for employees hired on or after January 1, 2011. The cash contributions to the defined contribution plan for the years ended December 31, 2021, 2020 and 2019 were $1.9 million, $1.9 million and $1.6 million, respectively.

Stock-Based Compensation Plans

Stock-Based Compensation Plans	12 Months Ended
Stock-Based Compensation Plans	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Stock-Based Compensation Plans	Stock-Based Compensation Plans Summary Description of Stock Incentive Plans As of December 31, 2021, AWR had three active stock incentive plans: the 2016 stock incentive plan for its employees, and the 2003 and 2013 non-employee directors plans for its Board of Directors, each more fully described below. 2016 Employee Plans — AWR adopted this employee plan, following shareholder approval, to provide stock-based incentive awards in the form of restricted stock units, stock options and restricted stock to employees as a means of promoting the success of Registrant by attracting, retaining and more fully aligning the interests of employees with those of customers and shareholders. The 2016 employee plan also provides for the grant of performance awards. There are no stock options or restricted stock grants currently outstanding. For restricted stock unit awards, the Compensation Committee determines the specific terms, conditions and provisions relating to each restricted stock unit. Each employee who has been granted a time-vested restricted stock unit is entitled to dividend equivalent rights in the form of additional restricted stock units until vesting of the time-vested restricted stock units. In general, time-vested restricted stock units vest over a period of three years. Restricted stock units may also vest upon retirement if the grantee is at least 55 and the sum of the grantee's age and years of service are equal to or greater than 75, or upon death or total disability. In addition, restricted stock units may vest following a change in control if the applicable subsidiary of AWR terminates the grantee other than for cause or the employee terminates employment for good reason. Each restricted stock unit is non-voting and entitles the holder of the restricted stock unit to receive one Common Share. The Compensation Committee also has the authority to determine the number, amount or value of performance awards, the duration of the performance period or performance periods applicable to the award and the performance criteria applicable to each performance award for each performance period. Each outstanding performance award granted by the Compensation Committee has been in the form of restricted stock units that generally vest over a period of three years as provided in the performance award agreement. The amount of the performance award paid to an employee depends upon satisfaction of performance criteria following the end of a three-year performance period. Performance awards may also vest and be payable upon retirement if the grantee is at least 55 and the sum of the grantee's age and years of service are equal to or greater than 75, or upon death or total disability. In addition, performance awards may vest following a change in control if the applicable subsidiary of AWR terminates the grantee other than for cause or the employee terminates employment for good reason. The amount of the payment for performance awards granted will be at target in the event of death or a termination of employment (other than for cause) by the applicable subsidiary of AWR or termination by the employee for good reason within 24 months after a change in control. In all other circumstances, adjustments will be made to the amount of the payment to take into account the shortened performance period 2003 and 2013 Directors Plans — The Board of Directors and shareholders of AWR have approved the 2003 and 2013 directors plans in order to provide the non-employee directors with supplemental stock-based compensation to encourage them to increase their stock ownership in AWR. New grants may not be made under the 2003 directors plan. Under the 2013 non-employee directors plan, non-employee directors are entitled to receive restricted stock units equal to two times the then current annual retainer for services as a director divided by the fair market value of AWR's Common Shares on the date preceding the annual meeting. Such units are convertible into AWR's Common Shares 90 days after the grant date. All non-employee directors of AWR who were directors of AWR at the 2003 annual meeting have also received restricted stock units, which will be distributed upon termination of the director's service as a director. All restricted stock units and performance awards have been granted with dividend equivalent rights payable in the form of additional restricted stock units. Recognition of Compensation Expense Registrant recognizes compensation expense related to the fair value of stock-based compensation awards. Share-based compensation cost is measured at the grant date, based on the calculated fair value of the award, and is recognized as an expense over the employee’s requisite service period (generally the vesting period of the equity grant). Immediate vesting occurs if the employee is at least 55 years old and the sum of the employee’s age and years of employment is equal to or greater than 75. Registrant assumes that pre-vesting forfeitures will be minimal, and recognizes pre-vesting forfeitures as they occur, which results in a reduction in compensation expense. The following table presents share-based compensation expenses for the years ended December 31, 2021, 2020 and 2019. These expenses resulting from restricted stock units, including performance awards, are included in administrative and general expenses in AWR's and GSWC’s statements of income: AWR GSWC For The Years Ended December 31, For The Years Ended December 31, (in thousands) 2021 2020 2019 2021 2020 2019 Stock-based compensation related to: Restricted stock units $ 2,566 $ 2,463 $ 2,517 $ 2,313 $ 2,349 $ 2,253 Total stock-based compensation expense $ 2,566 $ 2,463 $ 2,517 $ 2,313 $ 2,349 $ 2,253 Equity-based compensation cost capitalized as part of utility plant for the years ended December 31, 2021, 2020 and 2019 was $336,000, $299,000 and $265,000, respectively, for both AWR and GSWC. For the years ended December 31, 2021, 2020 and 2019, approximately $1.4 million, $1.2 million and $1.8 million, respectively, of tax benefits from stock-based awards were recorded for both AWR and GSWC. Registrant amortizes stock-based compensation over the requisite (vesting) period for the entire award. Time-vesting restricted stock units vest and become non-forfeitable in installments of 33% the first two years and 34% in the third year, starting one year from the date of the grant. Outstanding performance awards vest and become non-forfeitable in installments of 33% the first two years and 34% in the third year and are distributed at the end of the performance period if the Compensation Committee determines that the performance criteria set forth in the award agreement have been satisfied. Restricted Stock Units (Time-Vested) — A restricted stock unit (“RSU”) represents the right to receive a share of AWR’s Common Shares and are valued based on the fair market value of AWR's Common Shares on the date of grant. The fair value of RSUs were determined based on the closing trading price of Common Shares on the grant date. A summary of the status of Registrant’s outstanding RSUs, excluding performance awards, to employees and directors as of December 31, 2021, and changes during the year ended December 31, 2021, is presented below: Number of Weighted Average Restricted share units at January 1, 2021 69,339 $ 53.33 Granted 21,765 79.38 Vested (38,208) 74.15 Forfeited (1,786) 82.87 Restricted share units at December 31, 2021 51,110 $ 47.83 As of December 31, 2021, there was approximately $507,000 of total unrecognized compensation cost related to time-vested restricted stock units granted under AWR’s employee stock plans. That cost is expected to be recognized over a weighted average period of 1.49 years. Restricted Stock Units (Performance Awards) – During the years ended December 31, 2021, 2020 and 2019, the Compensation Committee granted performance awards in the form of restricted stock units to officers of the Registrant. A performance award represents the right to receive a share of AWR's Common Shares if the Compensation Committee determines that specified performance goals have been met over the performance period specified in the grant (generally three years). Each grantee of any outstanding performance award may earn between 0% and 200% of the target amount, which varies by target, depending on Registrant's performance against performance goals, which are determined by the Compensation Committee on the date of grant. As determined by the Compensation Committee, the performance awards granted during the years ended December 31, 2021, 2020 and 2019 included various performance-based conditions and one market-based condition related to total shareholder return ("TSR") that will be earned based on Registrant’s TSR compared to the TSR for a specific peer group of investor-owned water companies. A summary of the status of Registrant’s outstanding performance awards to officers as of December 31, 2021, and changes during the year ended December 31, 2021, is presented below: Number of Weighted Average Performance awards at January 1, 2021 57,960 $ 66.4 Granted 19,873 79.43 Performance criteria adjustment (1,775) 109.09 Vested (26,258) 56.49 Forfeited (890) 79.29 Performance awards at December 31, 2021 48,910 $ 75.23

Commitments

Commitments	12 Months Ended
Commitments	Dec. 31, 2021
Risks and Uncertainties [Abstract]
Commitments	Commitments GSWC’s Water Supply : GSWC has contracts to purchase water or water rights for an aggregate amount of $3.4 million as of December 31, 2021. Included in the $3.4 million is a commitment of $1.7 million to use water rights from a third party under an agreement, which expires in 2028. The remaining $1.7 million is for commitments for purchased water with other third parties, which expire from 2025 through 2038. GSWC’s estimated future minimum payments under these purchased water supply commitments at December 31, 2021 are as follows (in thousands): 2022 $ 436 2023 436 2024 436 2025 391 2026 346 Thereafter 1,345 Total $ 3,390 Bear Valley Electric Service, Inc. : Purchased Power Contracts: Generally, BVESI purchases power at a fixed cost, under long-term purchased power contracts, depending on the amount of power and the period during which the power is purchased under such contracts. BVESI began taking power pursuant to purchased power contracts approved by the CPUC effective in the fourth quarter of 2019 at a fixed cost over three Renewables Portfolio Standard: BVESI is subject to the renewables portfolio standard (“RPS”) law, which requires BVESI to meet certain targets for purchases of energy from qualified renewable energy resources. BVESI has an agreement with a third party to purchase renewable energy credits (“RECs”) whereby BVESI agreed to purchase approximately 578,000 RECs over a ten See Note 16 for Registrant’s future minimum payments under long-term non-cancelable operating leases.

Contingencies and Gain on Sale

Contingencies and Gain on Sale of Assets	12 Months Ended
Contingencies and Gain on Sale of Assets	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies Environmental Clean-Up and Remediation : GSWC has been involved in environmental remediation and cleanup at one of its plant sites that contained an underground storage tank, which was used to store gasoline for its vehicles. This tank was removed from the ground in July 1990 along with the dispenser and ancillary piping. Since then, GSWC has been involved in various remediation activities at this site. Analysis indicates that offsite monitoring wells may also be necessary to document effectiveness of remediation. As of December 31, 2021, the total spent to clean-up and remediate the plant site was approximately $6.1 million, of which $1.5 million has been paid by the State of California Underground Storage Tank Fund. Amounts paid by GSWC have been included in rate base and approved by the CPUC for recovery. As of December 31, 2021, GSWC has a regulatory asset and an accrued liability for the estimated remaining cost of $1.3 million to complete the cleanup at the site. The estimate includes costs for 2 years of continued activities of groundwater cleanup and monitoring, future soil treatment and site-closure-related activities. The ultimate cost may vary as there are many unknowns in remediation of underground gasoline spills and this is an estimate based on currently available information. Management also believes it is probable that the estimated additional costs will continue to be approved in rate base by the CPUC. Condemnation of Properties : The laws of the State of California provide for the acquisition of public utility property by governmental agencies through their power of eminent domain, also known as condemnation, where doing so is necessary and in the public interest. In addition, these laws provide that the owner of utility property (i) may contest whether the condemnation is necessary and in the public interest, and (ii) is entitled to receive the fair market value of its property if the property is ultimately taken. Other Litigation : Registrant is also subject to other ordinary routine litigation incidental to its business, some of which may include claims for compensatory and punitive damages. Management believes that rate recovery, proper insurance coverage and reserves are in place to insure against, among other things, property, general liability, employment and workers’ compensation claims incurred in the ordinary course of business. Insurance coverage may not cover certain claims involving, among other things, punitive damages. However, Registrant does not believe the outcome from any pending suits or administrative proceedings will have a material effect on Registrant's consolidated results of operations, financial position or cash flows.

Leases Leases

Leases Leases	12 Months Ended
Leases Leases	Dec. 31, 2021
Leases [Abstract]
Leases	LeasesRight-of-use ("ROU") assets represent the right to use an underlying asset for the lease term, and lease liabilities represent the obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at the lease commencement date based on the estimated present value of lease payments over the lease term. As of December 31, 2021, Registrant has right-of-use assets of $10.5 million, short-term operating lease liabilities of $2.0 million and long-term operating lease liabilities of $8.9 million. Currently, Registrant does not have any financing leases. Significant assumptions and judgments made as part of the adoption of this new lease standard include determining (i) whether a contract contains a lease, (ii) whether a contract involves an identified asset, and (iii) which party to the contract directs the use of the asset. The discount rates used to calculate the present value of lease payments were determined based on hypothetical borrowing rates available to Registrant over terms similar to the lease terms. Registrant’s leases consist of real estate and equipment leases, which are mostly GSWC's. Most of Registrant's leases require fixed lease payments. Some real estate leases have escalation payments which depend on an index. Variable lease costs were not material. Lease terms used to measure the lease liability include options to extend the lease if the option is reasonably certain to be exercised. Lease and non-lease components were combined to measure lease liabilities. Registrant's supplemental lease information for the year ended December 31, 2021 is as follows (in thousands, except for weighted average data): For The Year Ended December 31, 2021 For The Year Ended December 31, 2020 Operating lease costs $2,627 $2,873 Short-term lease costs 273 143 Weighted average remaining lease term (in years) 5.99 6.62 Weighted-average discount rate 3.7% 3.6% Non-cash transactions Lease liabilities arising from obtaining right-of-use assets $1,430 $27 For the years 2021, 2020 and 2019, Registrant’s consolidated rent expense was approximately $2.5 million, $2.6 million and $2.8 million, respectively. Registrant’s future minimum payments under long-term non-cancelable operating leases as of December 31, 2021 are as follows (in thousands): 2022 $ 2,548 2023 2,135 2024 1,821 2025 1,651 2026 1,456 Thereafter 2,801 Total lease payments 12,412 Less: imputed interest 1,448 Total lease obligations 10,964 Less: current obligations 2,044 Long-term lease obligations $ 8,920 The consolidated operations of AWR and the operations of GSWC in regard to future minimum payments under long-term non-cancelable operating leases are not materially different.

Business Segments

Business Segments	12 Months Ended
Business Segments	Dec. 31, 2021
Segment Reporting [Abstract]
Business Segments	Business Segments AWR has 3 reportable segments, water, electric and contracted services. Since July 1, 2020, GSWC has 1 segment, water. Prior to July 1, 2020, GSWC also had an electric segment. On July 1, 2020, GSWC completed the transfer of the electric utility assets and liabilities from its electric division to BVESI, now a wholly owned direct subsidiary of AWR. As a result of this transfer, from July 1, 2020 onward, operating results and cash flows of the electric segment, as well as its assets and liabilities as of December 31, 2021 and 2020, are no longer included in GSWC's financial statements, but continue to be included in AWR's consolidated financial statements (Note 20). On a stand-alone basis, AWR has no material assets other than its equity investments in its subsidiaries and notes receivable therefrom, and deferred taxes. All activities of GSWC and BVESI are geographically located within California. Activities of ASUS and the Military Utility Privatization Subsidiaries are conducted in California, Florida, Georgia, Kansas, Maryland, New Mexico, North Carolina, South Carolina, Texas and Virginia. Each of the Military Utility Privatization Subsidiaries is regulated, if applicable, by the state in which the subsidiary primarily conducts water and/or wastewater operations. Fees charged for operations and maintenance and renewal and replacement services are based upon the terms of the contracts with the U.S. government, which have been filed, as appropriate, with the commissions in the states in which ASUS’s subsidiaries are incorporated. The tables below set forth information relating to the water and electric operating segments, ASUS and the Military Utility Privatization Subsidiaries and other matters. The utility plant balances are net of respective accumulated provisions for depreciation. Capital additions reflect capital expenditures paid in cash and exclude U.S. government-funded and third-party prime funded capital expenditures for ASUS and property installed by developers and conveyed to GSWC and BVESI. As Of And For The Year Ended December 31, 2021 AWR Consolidated (dollars in thousands) Water Electric ASUS Parent AWR Operating revenues $ 347,112 $ 38,345 $ 113,396 $ — $ 498,853 Operating income (loss) 107,573 10,738 22,675 (9) 140,977 Interest expense, net 21,046 141 (637) 791 21,341 Utility Plant 1,499,745 106,508 19,751 — 1,626,004 Depreciation and amortization expense (1) 33,384 2,572 3,640 — 39,596 Income tax expense (benefit) 22,095 2,975 5,434 (81) 30,423 Capital additions 123,526 19,859 1,130 — 144,515 As Of And For The Year Ended December 31, 2020 AWR Consolidated (dollars in thousands) Water Electric ASUS Parent AWR Operating revenues $ 330,637 $ 37,024 $ 120,582 $ — $ 488,243 Operating income (loss) 97,896 10,303 22,309 (9) 130,499 Interest expense, net 20,312 584 (496) 330 20,730 Utility Plant 1,400,489 89,308 22,246 — 1,512,043 Depreciation and amortization expense (1) 30,969 2,479 3,402 — 36,850 Income tax expense/(benefit) 20,515 2,689 5,201 (208) 28,197 Capital additions 107,355 18,393 4,675 — 130,423 As Of And For The Year Ended December 31, 2019 GSWC AWR Consolidated (dollars in thousands) Water Electric ASUS Parent AWR Operating revenues $ 319,830 $ 39,548 $ 114,491 $ — $ 473,869 Operating income (loss) 93,895 11,197 21,990 (9) 127,073 Interest expense, net 20,304 1,228 (734) 539 21,337 Utility Plant 1,322,062 72,680 20,963 — 1,415,705 Depreciation and amortization expense (1) 29,956 2,485 2,956 — 35,397 Income tax expense/(benefit) 17,295 2,882 5,202 (709) 24,670 Capital additions 131,353 11,499 9,088 — 151,940 ____________________________ (1) Depreciation computed on regulated utilities' transportation equipment is recorded in other operating expenses and totaled $379,000, $353,000 and $316,000 for the years ended December 31, 2021, 2020 and 2019, respectively. The following table reconciles total utility plant (a key figure for rate-making) to total consolidated assets (in thousands): December 31, 2021 2020 Total utility plant $ 1,626,004 $ 1,512,043 Other assets 274,979 279,560 Total consolidated assets $ 1,900,983 $ 1,791,603

Allowance for Doubtful Accounts

Allowance for Doubtful Accounts	12 Months Ended
Allowance for Doubtful Accounts	Dec. 31, 2021
Allowance for Doubtful Accounts
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts Registrant adopted ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments , effective January 1, 2020. The guidance requires estimated credit losses on financial instruments, such as Registrant's trade and other receivables, be based on expected credit losses rather than incurred losses. Registrant's allowance for doubtful accounts as of December 31, 2021 was developed based on the observed effects of the economic impact from the COVID-19 pandemic on GSWC's and BVESI's aging of utility customer accounts receivable, as well as economic data and other considerations that may impact customers' ability to pay their bills. However, the CPUC has authorized GSWC and BVESI to track incremental costs, including bad debt expense in excess of what is included in their respective revenue requirements, incurred as a result of the pandemic in COVID-19 related memorandum accounts to be filed with the CPUC for future recovery. The allowance for doubtful accounts as of December 31, 2021 also reflects management's consideration of the December 2021 approval from the SWRCB for $9.5 million of relief funding for customers' unpaid water bills incurred during the pandemic. Pursuant to CPUC requirements, as of December 31, 2021, GSWC has reflected these relief funds as a reduction to its COVID-19 memorandum account, as well as a reduction to its estimated allowance for doubtful accounts. In January 2022, GSWC received the relief funds from the state of California, which are being applied to delinquent customers' eligible balances incurred during the COVID-19 pandemic. In February 2022, BVESI received $321,000 from the state of California for similar relief funding for unpaid electric bills incurred during the pandemic. Other accounts receivable consist primarily of amounts due from third parties (non-utility customers) for various reasons, including amounts due from contractors, amounts due under settlement agreements, and amounts due from other third-party prime government contractors pursuant to agreements for construction of water and/or wastewater facilities for such third-party prime contractors. Thus far, the COVID-19 pandemic has not materially impacted the collectability of these other accounts receivable. The table below presents Registrant’s provision for doubtful accounts charged to expense and accounts written off, net of recoveries. Provisions included in 2021, 2020 and 2019 for AWR and GSWC are as follows: AWR December 31, (dollars in thousands) 2021 2020 2019 Balance at beginning of year $ 5,316 $ 916 $ 951 Provision charged (1) 8,150 5,016 609 Accounts written off, net of recoveries (2) (9,897) (616) (644) Balance at end of year $ 3,569 $ 5,316 $ 916 Allowance for doubtful accounts related to accounts receivable-customer $ 3,516 $ 5,263 $ 857 Allowance for doubtful accounts related to other accounts receivable 53 53 59 Total allowance for doubtful accounts $ 3,569 $ 5,316 $ 916 (1) Includes amounts in excess of GSWC's and BVESI's respective revenue requirements incurred during the COVID-19 pandemic. These incremental amounts are recorded as regulatory assets. (2) Reflects consideration of government relief funds received in 2022 from the state of California for unpaid water and electric utility bills incurred during the pandemic. A total of $9.5 million and $321,000 was received in 2022 for unpaid water and electric utility bills, respectively. GSWC December 31, (dollars in thousands) 2021 2020 2019 Balance at beginning of year $ 4,960 $ 916 $ 951 Provision charged (3) 7,732 4,703 607 Balance transfer to BVESI (Note 20) — (79) — Accounts written off, net of recoveries (4) (9,471) (580) (642) Balance at end of year $ 3,221 $ 4,960 $ 916 Allowance for doubtful accounts related to accounts receivable-customer $ 3,168 $ 4,907 $ 857 Allowance for doubtful accounts related to other accounts receivable 53 53 59 Total allowance for doubtful accounts $ 3,221 $ 4,960 $ 916

Statement of Cash Flows, Supple

Statement of Cash Flows, Supplemental Disclosures	12 Months Ended
Statement of Cash Flows, Supplemental Disclosures	Dec. 31, 2021
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information The following table sets forth non-cash financing and investing activities and other cash flow information (in thousands). AWR GSWC December 31, December 31, 2021 2020 2019 2021 2020 2019 Taxes and Interest Paid: Income taxes paid, net $ 29,153 $ 13,684 $ 22,496 $ 21,428 $ 8,184 $ 17,206 Interest paid, net of capitalized interest 22,540 19,941 25,080 21,156 19,681 23,925 Non-Cash Transactions: Accrued payables for investment in utility plant 32,855 27,861 23,736 30,656 25,633 23,736 Property installed by developers and conveyed 7,222 3,102 6,220 7,222 3,102 6,220 Transfer of electric segment net assets (net of cash) for BVESI common shares (Note 20) — — — — 71,324 — Distribution of BVESI common shares to AWR parent (Note 20) — — — — 71,344 —

Completion of Electric Utility

Completion of Electric Utility Reorganization Plan	12 Months Ended
Completion of Electric Utility Reorganization Plan	Dec. 31, 2021
Restructuring and Related Activities [Abstract]
Completion of Electric Utility Reorganization Plan	Completion of Electric Utility Reorganization Plan On July 1, 2020, GSWC completed the transfer of approximately $71.3 million in net assets and equity (based on their recorded amounts) from its electric utility division to BVESI in exchange for common shares of BVESI of equal value. As a result of this transfer, from July 1, 2020 onward, operating results and cash flows of the electric segment, as well as its assets and liabilities as of December 31, 2021 and 2020, are no longer included in GSWC's financial statements, but continue to be included in AWR's consolidated financial statements. GSWC's statement of income for 2020 includes the electric segment's results through June 30, 2020. The table below sets forth selected information relating to the electric segment's results of operations for 2021, and for the six month periods ended June 30, 2020 and December 31, 2020 (in thousands): Twelve months ended December 31, 2021 Six months ended June 30, 2020 Six months ended December 31, 2020 Twelve months ended December 31, 2020 (Subsidiary of AWR) (Division of GSWC) (Subsidiary of AWR) Electric revenues $ 38,345 $ 18,647 $ 18,377 $ 37,024 Operating expenses 27,607 13,647 13,074 26,721 Operating income 10,738 5,000 5,303 10,303 Net income $ 7,864 $ 3,408 $ 3,870 $ 7,278 The table below sets forth selected information relating to the electric segment's cash flows for 2021, as well as the six months ended December 31, 2020. Prior to July 1, 2020, the electric segment's cash flows were included in GSWC's cash flows. For the Twelve Months Ended December 31, 2021 Six Months Ended December 31, 2020 (Subsidiary of AWR) (Subsidiary of AWR) Net cash provided from operating activities $ 9,128 $ 1,887 Net cash used in investing activities (capital expenditures) (19,859) (9,339) Net cash provided from financing activities (1) 10,827 7,799 Net change in cash and cash equivalents 96 347 Cash and cash equivalents, beginning of period 367 20 Cash and cash equivalents, end of period $ 463 $ 367

SCHEDULE I - CONDENSED FINANCIA

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT	12 Months Ended
SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT	CONDENSED BALANCE SHEETS December 31, (in thousands) 2021 2020 Assets Cash and equivalents $ 51 $ 441 Income taxes receivable — 72 Intercompany note receivables 79,722 32,819 Total current assets 79,773 33,332 Investments in subsidiaries 774,751 716,627 Deferred taxes and other assets 9,620 9,757 Total assets $ 864,144 $ 759,716 Liabilities and Capitalization Income taxes payable $ 1,765 $ 2,123 Other liabilities 309 272 Total current liabilities 2,074 2,395 Notes payable to bank 174,500 114,000 Deferred taxes and other liabilities 1,623 1,648 Total other liabilities 176,123 115,648 Common shareholders’ equity 685,947 641,673 Total capitalization 685,947 641,673 Total liabilities and capitalization $ 864,144 $ 759,716 The accompanying condensed notes are an integral part of these condensed financial statements. CONDENSED STATEMENTS OF INCOME For the Years Ended December 31, (In thousands, except per share amounts) 2021 2020 2019 Operating revenues and other income $ — $ — $ — Operating expenses and other expenses 542 90 314 Income before equity in earnings of subsidiaries and income taxes (542) (90) (314) Equity in earnings of subsidiaries 94,808 86,307 83,947 Income before income taxes 94,266 86,217 83,633 Income tax benefit (81) (208) (709) Net income $ 94,347 $ 86,425 $ 84,342 Weighted Average Number of Common Shares Outstanding 36,921 36,880 36,814 Basic Earnings Per Common Share $ 2.55 $ 2.34 $ 2.28 Weighted Average Number of Diluted Common Shares Outstanding 37,010 36,995 36,964 Fully Diluted Earnings per Common Share $ 2.55 $ 2.33 $ 2.28 Dividends Paid Per Common Share 1.40 1.28 1.16 The accompanying condensed notes are an integral part of these condensed financial statements. CONDENSED STATEMENTS OF CASH FLOWS For the Years Ended December 31, (in thousands) 2021 2020 2019 Cash Flows From Operating Activities $ 36,799 $ 47,307 $ 40,459 Cash Flows From Investing Activities: Loans (made to)/repaid from, wholly-owned subsidiaries (46,000) 151,000 (107,500) Increase in investment of subsidiary — (60,000) — Net cash (used) provided in investing activities (46,000) 91,000 (107,500) Cash Flows From Financing Activities: Proceeds from stock option exercises — 30 519 Net change in notes payable to banks 60,500 (91,000) 109,500 Proceeds from note payable to GSWC (26,000) (6,000) — Repayment of note payable to GSWC 26,000 6,000 — Dividends paid (51,689) (47,206) (42,702) Net cash provided (used) in financing activities 8,811 (138,176) 67,317 Change in cash and equivalents (390) 131 276 Cash and equivalents at beginning of period 441 310 34 Cash and equivalents at the end of period $ 51 $ 441 $ 310 The accompanying condensed financial statements of AWR (parent) should be read in conjunction with the consolidated financial statements and notes thereto of American States Water Company and subsidiaries (“Registrant”) included in Part II, Item 8 of this Form 10-K. AWR’s (parent) significant accounting policies are consistent with those of Registrant and its wholly owned subsidiaries, Golden State Water Company (“GSWC”), Bear Valley Electric Service, Inc. ("BVESI") and American States Utility Services, Inc. ("ASUS"), except that all subsidiaries are accounted for as equity method investments. Related-Party Transactions: As further discussed in Note 2 — Notes Payable to Banks , AWR (parent) currently has access to a $200.0 million revolving credit facility, which expires in May 2023. AWR (parent) borrows under this facility and provides funds to GSWC and ASUS in support of their operations. Any amounts owed to AWR (parent) for borrowings under this facility are reflected as inter-company receivables on the condensed balance sheets. The interest rate charged to the subsidiaries is sufficient to cover AWR (parent)’s interest cost under the credit facility. In October 2020, AWR (parent) issued an interest bearing promissory note to GSWC, which expires in May 2023. Under the terms of the note, AWR (parent) may borrow from GSWC amounts up to $30 million for working capital purposes. AWR (parent) agrees to pay any unpaid principal amounts outstanding under this note, plus accrued interest. During 2021 and 2020, AWR borrowed and repaid a total of $26 million and $6 million, respectively, from GSWC under the terms of the note. As of December 31, 2021, there were no amounts outstanding under this note. AWR (parent) guarantees performance of ASUS's military privatization contracts and agrees to provide necessary resources, including financing, which are necessary to assure the complete and satisfactory performance of such contracts. AWR currently has access to a $200.0 million credit facility expiring in May 2023 in order to provide funds to GSWC and ASUS in support of their operations on terms that are similar to that of the credit facility. At December 31, 2021, there was $174.5 million outstanding under the credit facility. The aggregate effective amount that may be outstanding under letters of credit is $25.0 million. AWR has obtained letters of credit, for AWR and GSWC, in the aggregate amount of $455,000 at fees of 0.65%. Letters of credit outstanding reduce the amount that may be borrowed under the revolving credit facility. AWR is not required to maintain any compensating balances. Loans may be obtained under this credit facility at the option of AWR and bear interest at rates based on credit ratings and LIBOR margins. In March 2021, Standard and Poor’s Global Ratings (“S&P”) affirmed an A+ credit rating for both AWR and GSWC. S&P also revised its rating outlook to negative from stable for both companies. S&P’s debt ratings range from AAA (highest possible) to D (obligation is in default). AWR’s (parent) borrowing activities (excluding letters of credit) for the years ended December 31, 2021 and 2020 were as follows: December 31, (in thousands, except percent) 2021 2020 Balance Outstanding at December 31, $ 174,500 $ 114,000 Interest Rate at December 31, 0.78 % 1.19 % Average Amount Outstanding 139,926 160,495 Weighted Average Annual Interest Rate 0.91 % 1.47 % Maximum Amount Outstanding $ 174,500 $ 249,000 All of the letters of credit are issued pursuant to the revolving credit facility. The revolving credit facility contains restrictions on prepayments, disposition of property, mergers, liens and negative pledges, indebtedness and guaranty obligations, transactions with affiliates, minimum interest coverage requirements, a maximum debt to capitalization ratio and a minimum debt rating. Pursuant to the credit agreement, AWR must maintain a minimum interest coverage ratio of 3.25 times interest expense, a maximum total funded debt ratio of 0.65 to 1.00 and a minimum debt rating from Moody’s or S&P of Baa3 or BBB-, respectively. As of December 31, 2021, 2020 and 2019, AWR was in compliance with these covenants. As of December 31, 2021, AWR had an interest coverage ratio of 8.21 times interest expense, a debt ratio of 0.47 to 1.00 and a debt rating of A+ by S&P.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	Dec. 31, 2021
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Nature of Operations : American States Water Company (“AWR”) is the parent company of Golden State Water Company (“GSWC”), Bear Valley Electric Service Inc. ("BVESI"), and American States Utility Services, Inc. (“ASUS”) (and its wholly owned subsidiaries, Fort Bliss Water Services Company (“FBWS”), Terrapin Utility Services, Inc. (“TUS”), Old Dominion Utility Services, Inc. (“ODUS”), Palmetto State Utility Services, Inc. (“PSUS”), Old North Utility Services, Inc. (“ONUS”), Emerald Coast Utility Services, Inc. (“ECUS”), and Fort Riley Utility Services, Inc. ("FRUS")). AWR and its subsidiaries may be collectively referred to as “Registrant” or “the Company.” The subsidiaries of ASUS are collectively referred to as the “Military Utility Privatization Subsidiaries.” On July 1, 2020, GSWC completed the transfer of the electric utility assets and liabilities from its electric division to BVESI, a separate legal entity and wholly owned subsidiary of AWR (Note 20). This reorganization did not result in any substantive changes to AWR's operations and business segments. AWR, through its wholly owned subsidiaries, serves over one million people in nine states. GSWC and BVESI are both California public utilities, with GSWC engaged in the purchase, production, distribution and sale of water throughout California serving approximately 262,800 customers, while BVESI distributes electricity in several San Bernardino County mountain communities in California serving approximately 24,700 customers. The California Public Utilities Commission (“CPUC”) regulates GSWC’s and BVESI's businesses in matters including properties, rates, services, facilities, and transactions between GSWC, BVESI, and their affiliates. ASUS, through its Military Utility Privatization Subsidiaries, operates, maintains and performs construction activities (including renewal and replacement capital work) on water and/or wastewater systems at various U.S. military bases pursuant to 50-year firm fixed-price contracts. These contracts are subject to annual economic price adjustments and modifications for changes in circumstances, changes in laws and regulations and additions to the contract value for new construction of facilities at the military bases. There is no direct regulatory oversight by the CPUC over AWR or the operations, rates or services provided by ASUS or the Military Utility Privatization Subsidiaries. Basis of Presentation : The consolidated financial statements and notes thereto are presented in a combined report filed by two separate Registrants: AWR and GSWC. References in this report to “Registrant” are to AWR and GSWC, collectively, unless otherwise specified. AWR owns all of the outstanding Common Shares of GSWC, BVESI and ASUS. ASUS owns all of the outstanding common shares of the Military Utility Privatization Subsidiaries. The consolidated financial statements of AWR include the accounts of AWR and its subsidiaries. These financial statements are prepared in conformity with accounting principles generally accepted in the United States of America. Intercompany transactions and balances have been eliminated in the AWR consolidated financial statements.
Related Party Transactions [Policy Text Block]	Related-Party Transactions : GSWC, BVESI and ASUS provide and/or receive various support services to and from their parent, AWR, and among themselves. GSWC also allocates certain corporate office administrative and general costs to its affiliates BVESI and ASUS using allocation factors approved by the CPUC. During the years ended December 31, 2021, 2020 and 2019, GSWC allocated to ASUS approximately $5.3 million, $4.9 million and $4.7 million, respectively, of corporate office administrative and general costs. During the years ended December 31, 2021 and 2020, GSWC allocated corporate office administrative and general costs to BVESI of approximately $2.8 million and $1.3 million, respectively. BVESI assumed operations of the electric segment on July 1, 2020. Furthermore, AWR borrows under a credit facility, which expires in May 2023, and provides funds to GSWC and ASUS in support of their operations. The interest rate charged to GSWC and ASUS is sufficient to cover AWR’s interest expense under the credit facility. As of December 31, 2021, GSWC had $49.3 million outstanding under its intercompany borrowing arrangement with AWR. The intercompany borrowing agreement with AWR is considered a short-term debt arrangement by the CPUC. GSWC has been authorized by the CPUC to borrow under this arrangement for a term of up to 24 months. Borrowings under this arrangement are, therefore, required to be fully paid off within a 24-month period. GSWC’s next pay-off period for its intercompany borrowings from AWR ends in May 2023. Accordingly, the $49.3 million outstanding has been classified as a non-current liability under “Other Credits” in GSWC’s Balance Sheet as of December 31, 2021. In October 2020, AWR issued an interest bearing promissory note to GSWC, which expires in May 2023. Under the terms of the note, AWR may borrow from GSWC amounts up to $30 million for working capital purposes. AWR agrees to pay any unpaid principal amounts outstanding under this note, plus accrued interest. During 2021, AWR borrowed and repaid a total of $26 million from GSWC under the terms of the note. As of December 31, 2021, there were no amounts outstanding under this note.
COVID-19 Impact [Policy Text Block]	COVID-19 Impact : GSWC, BVESI and ASUS have continued their operations throughout the COVID-19 pandemic given that their water, wastewater and electric utility services are deemed essential. AWR's responses take into account orders issued by the CPUC, and the guidance provided by federal, state, and local health authorities and other government officials for the COVID-19 pandemic. Some of the actions taken by GSWC and BVESI included suspending service disconnections for nonpayment pursuant to CPUC and state orders, and telecommuting by employees. The suspension of water-service disconnections at GSWC were implemented in response to an executive order from the governor of California, as well as CPUC orders. Pursuant to a CPUC decision issued in July 2021, the moratorium on water-service disconnections due to non-payment of past-due amounts billed to residential customers expired on February 1, 2022. However, water service cannot be disconnected so long as customers make timely payments on current bills, and are provided and adhere to payment plans to pay down past-due bills resulting from the pandemic. The moratorium on electric customer service disconnections ended on September 30, 2021. However, electric-service disconnections for non-payment can only be done after taking into account certain matters, such as average daily temperatures under certain conditions. The pandemic has caused volatility in financial markets resulting in fluctuations in the fair value of plan assets in GSWC's pension and other retirement plans. In addition, the economic impact of the pandemic has also significantly increased the amount of delinquent customer accounts receivable, resulting in both GSWC and BVESI increasing their allowance for doubtful accounts throughout the pandemic. However, the CPUC has authorized GSWC and BVESI to track incremental costs, including bad debt expense in excess of what is included in their respective revenue requirements, incurred as a result of the pandemic in COVID-19-related memorandum accounts to be filed with the CPUC for future recovery. On July 12, 2021, the governor of California approved SB-129 Budget Act of 2021, in which nearly $1 billion in relief funding for overdue water customer bills, and nearly $1 billion in relief funding for overdue electric customer bills were included. The water customer relief funding is being managed by the State Water Resources Control Board ("SWRCB") through the California Water and Wastewater Arrearage Payment Program to provide assistance to customers for their water debt accrued during the COVID-19 pandemic by remitting federal funds that the state received from the American Rescue Plan Act of 2021 to the utility on behalf of eligible customers. In December 2021, GSWC received SWRCB approval for $9.5 million of relief funding of customers' unpaid water bills incurred during the pandemic. In January 2022, GSWC received these funds, which it is applying to its delinquent customers' eligible balances. Accordingly, as of December 31, 2021, GSWC has reflected these relief funds as a reduction to its COVID-19 memorandum account, as well as a reduction to its estimated customer bad debt reserve. In February 2022, BVESI received $321,000 from the state of California for similar customer relief funding for unpaid electric customer bills incurred during the pandemic. GSWC and BVESI continue to experience delinquent account activity because of the ongoing pandemic. As of December 31, 2021, GSWC and BVESI had approximately $1.7 million and $302,000, respectively, in regulatory asset accounts related to bad debt expense in excess of their revenue requirements, the purchase of personal protective equipment, additional incurred printing costs, and other incremental COVID-19-related costs. The CPUC requires that amounts tracked in GSWC's and BVESI's COVID-19 memorandum accounts for unpaid customer bills be first offset by any (i) federal or state relief for customers' utility bill debt, and (ii) customer payments through payment-plan arrangements prior to receiving recovery from customers at large. After these offsets are made, GSWC and BVESI will each file with the CPUC for recovery of any remaining balances. By tracking incremental COVID-19-related costs in the CPUC-approved memorandum accounts, GSWC and BVESI can later ask for recovery of these costs from the CPUC. The COVID-19 memorandum account and other emergency-type memorandum accounts are established as a result of a state or federally declared emergency, and are therefore recognized as regulatory assets for future recovery. As a result, the amounts recorded in the COVID-19-related memorandum accounts have not impacted GSWC's and BVESI's earnings during the pandemic. ASUS has experienced some delays in receiving contract modifications from the U.S. government for additional construction projects due to government staffing shortages resulting from the COVID-19 pandemic but this has not had a material impact on its current operations.
Utility Accounting [Policy Text Block]	Utility Accounting : Registrant’s accounting policies conform to accounting principles generally accepted in the United States of America ("GAAP"), including the accounting principles for rate-regulated enterprises, which reflect the ratemaking policies of the CPUC and, to the extent applicable, the Federal Energy Regulatory Commission. GSWC and BVESI have incurred various costs and received various credits reflected as regulatory assets and liabilities. Accounting for such costs and credits as regulatory assets and liabilities is in accordance with the guidance for accounting for the effects of certain types of regulation. This guidance sets forth the application of GAAP for those companies whose rates are established by or are subject to approval by an independent third-party regulator. Under such accounting guidance, rate-regulated entities defer costs and credits on the balance sheet as regulatory assets and liabilities when it is probable that those costs and credits will be recognized in the ratemaking process in a period different from the period in which they would have been reflected in income by an unregulated company. These regulatory assets and liabilities are then recognized in the income statement in the period in which the same amounts are reflected in the
Property and Depreciation [Policy Text Block]	Property and Depreciation : Registrant's property consists primarily of regulated utility plant at GSWC and BVESI. GSWC and BVESI capitalize, as utility plant, the cost of construction and the cost of additions, betterments and replacements of retired units of property. Such costs includes labor, material and certain indirect charges. Water systems acquired are recorded at estimated original cost of utility plant when first devoted to utility service and the applicable depreciation is recorded to accumulated depreciation. The difference between the estimated original cost, less accumulated depreciation, and the purchase price, if recognized by the CPUC, is recorded as an acquisition adjustment within utility plant. Depreciation for the regulated utilities is computed on the straight-line, remaining-life basis, group method, in accordance with the applicable ratemaking process. The provision for depreciation expressed as a percentage of the aggregate depreciable asset balances for regulated utilities was 2.2% for each of the years 2021, 2020 and 2019. Depreciation expense for regulated utilities, excluding amortization expense and depreciation on transportation equipment, totaled $35.5 million, $32.9 million and $31.7 million for the years ended December 31, 2021, 2020 and 2019, respectively. Depreciation computed on regulated utilities’ transportation equipment is recorded in other operating expenses and totaled $379,000, $353,000 and $316,000 for the years 2021, 2020 and 2019, respectively. Expenditures for maintenance and repairs are expensed as incurred. Retired property costs, including costs of removal, are charged to the accumulated provision for depreciation. Estimated useful lives of regulated utilities’ utility plant, as authorized by the CPUC, are as follows: Source of water supply 30 years to 50 years Pumping 25 years to 40 years Water treatment 20 years to 35 years Transmission and distribution 25 years to 55 years Generation 40 years Other plant 7 years to 40 years Non-regulated property consists primarily of equipment utilized by ASUS and its subsidiaries for its operations. This property is stated at cost, net of accumulated depreciation, which is calculated using the straight-line method over the useful lives of the assets.
Asset Retirement Obligation [Policy Text Block]	Asset Retirement Obligations : GSWC has a legal obligation for the retirement of its wells, which by law need to be properly capped at the time of removal. As such, GSWC incurs asset retirement obligations. GSWC records the fair value of a liability for these asset retirement obligations in the period in which they are incurred. When the liability is initially recorded, GSWC capitalizes the cost by increasing the carrying amount of the related long-lived asset. Over time, the liability is accreted to its present value each period, and the capitalized cost is depreciated over the useful life of the related asset. Upon settlement of the liability, GSWC either settles the obligation for its recorded amount or incurs a gain or loss upon settlement. Retirement costs have historically been recovered through rates subsequent to the retirement costs being incurred. Accordingly, recoverability of GSWC’s asset retirement obligations are reflected as a regulatory asset. GSWC also reflects the loss or gain at settlement as a regulatory asset or liability on the balance sheet. With regards to removal costs associated with certain other long-lived assets, such as water mains, distribution and transmission assets, asset retirement obligations have not been recognized as GSWC believes there is no legal obligation to do so. There are no CPUC rules or regulations that require GSWC to remove any of its other long-lived assets. In addition, GSWC’s water pipelines are not subject to regulation by any federal regulatory agency. GSWC has franchise agreements with various municipalities in order to use the public right of way for utility purposes (i.e., operate water distribution and transmission assets), and if certain events occur in the future, GSWC could be required to remove or relocate certain of its pipelines. However, it is not possible to estimate an asset retirement amount since the timing and the amount of assets that may be required to be removed, if any, is not known.
Impairment of Long-Lived Assets [Policy Text Block]	Impairment of Long-Lived Assets : Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be fully recoverable in accordance with accounting guidance for impairment or disposal of long-lived assets. Registrant would recognize an impairment loss on its regulated assets
Goodwill [Policy Text Block]	Goodwill : At December 31, 2021 and 2020, AWR had approximately $1.1 million of goodwill. The $1.1 million goodwill arose from ASUS’s acquisition of a subcontractor’s business at some of the Military Utility Privatization Subsidiaries. In accordance with the accounting guidance for testing goodwill, AWR annually assesses qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. For 2021 and 2020, AWR’s assessment of qualitative factors did not indicate that an impairment had occurred for goodwill at ASUS.
Cash and Cash Equivalents [Policy Text Block]	Cash and Cash Equivalents: Cash and cash equivalents include short-term cash investments with an original maturity of three months or less. At times, cash and cash equivalent balances may be in excess of federally insured limits. Cash and cash equivalents are held with financial institutions with high credit standings.
Accounts Receivable [Policy Text Block]	Accounts Receivable : Accounts receivable is reported on the balance sheet net of any allowance for doubtful accounts. The allowance for doubtful accounts is Registrant’s best estimate of the amount of probable credit losses in Registrant’s existing accounts receivable from its water and electric customers, and is determined based on expected losses rather than incurred losses. Registrant reviews the allowance for doubtful accounts quarterly. Account balances are written off against the allowance when it is probable the receivable will not be recovered. When utility customers request extended payment terms, credit is extended based on regulatory guidelines, and collateral is not required.
Materials and Supplies [Policy Text Block]	Materials and Supplies: Materials and supplies are stated at the lower of cost or net realizable value. Cost is computed using weighted average cost. Major classes of materials include pipe, meters, hydrants and valves.
Interest [Policy Text Block]	Interest : Interest incurred during the construction of capital assets has generally not been capitalized for financial reporting purposes as such policy is not followed in the ratemaking process. Interest expense is generally recovered through the regulatory process. At times, the CPUC has authorized certain capital projects to be filed for revenue recovery with advice letters when those projects are completed. During the time that such projects are under development and construction, GSWC or BVESI may accrue an allowance for funds used during construction (“AFUDC”) on the incurred expenditures to offset the cost of financing project construction. For the year ended December 31, 2021 and 2020, BVESI recorded $216,000 and $200,000, respectively in AFUDC. For the year ended December 31, 2019, the amount of AFUDC recorded was immaterial.
Debt Issuance Costs and Redemption Premiums [Policy Text Block]	Debt Issuance Costs and Redemption Premiums: Original debt issuance costs are deducted from the carrying value of the associated debt liability and amortized over the lives of the respective issues. Premiums paid on the early redemption of debt are deferred as regulatory assets and amortized over the period that GSWC recovers such costs in rates, which is generally over the term of the new debt issued to finance the early redemption.
Advance for Construction and Contributions in Aid [Policy Text Block]	Advances for Construction and Contributions in Aid of Construction: Advances for construction represent amounts advanced by developers for the cost to construct water system facilities in order to extend water service to their properties. Advances are refundable in equal annual installments, generally over 40 years. In certain instances, GSWC makes refunds on these advances over a specific period of time based on operating revenues related to the main or as new customers are connected to receive service from the main. Contributions in aid of construction are similar to advances but require no refunding. Generally, GSWC and BVESI depreciate contributed property and amortize contributions in aid of construction at the composite rate of the related property. Utility plant funded by advances and contributions is excluded from rate base.
Fair Value of Financial Instruments, Policy [Policy Text Block]	Fair Value of Financial Instruments : For cash and cash equivalents, accounts receivable, accounts payable and short-term debt, the carrying amount is assumed to approximate fair value due to the short-term nature of the amounts. The table below estimates the fair value of long-term debt issued by GSWC. Rates available to GSWC at December 31, 2021 and 2020 for debt with similar terms and remaining maturities were used to estimate fair value for long-term debt. Changes in the assumptions will produce differing results. 2021 2020 (dollars in thousands) Carrying Amount Fair Value Carrying Amount Fair Value Long-term debt—GSWC (1) $ 415,788 $ 490,852 $ 444,271 $ 559,752 (1) Excludes debt issuance costs and redemption premiums. The accounting guidance for fair value measurements applies to all financial assets and financial liabilities that are being measured and reported on a fair value basis. Under the accounting guidance, GSWC makes fair value measurements on its publicly issued notes, private placement notes and other long-term debt using current U.S. corporate bond yields for similar debt instruments. Under the fair value guidance, these are classified as Level 2, which consists of quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability. The following table sets forth by level, within the fair value hierarchy, GSWC’s long-term debt measured at fair value as of December 31, 2021: (dollars in thousands) Level 1 Level 2 Level 3 Total Long-term debt—GSWC — $ 490,852 — $ 490,852
Stock-Based Awards [Policy Text Block]	Stock-Based Awards : AWR has issued stock-based awards to its employees under stock incentive plans. AWR has also issued stock-based awards to its Board of Directors under non-employee directors stock plans. Registrant applies the provisions in the accounting guidance for share-based payments in accounting for all of its stock-based awards. See Note 13 for further discussion.
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Issued Accounting Pronouncements : In December 2019, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2019-12, Income Taxes (Topic 740)—Simplifying the Accounting for Income Taxes

Summary of Significant Accoun_3

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2021
Accounting Policies [Abstract]
Public Utility Property, Plant, and Equipment [Table Text Block]	Estimated useful lives of regulated utilities’ utility plant, as authorized by the CPUC, are as follows: Source of water supply 30 years to 50 years Pumping 25 years to 40 years Water treatment 20 years to 35 years Transmission and distribution 25 years to 55 years Generation 40 years Other plant 7 years to 40 years
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]	The table below estimates the fair value of long-term debt issued by GSWC. Rates available to GSWC at December 31, 2021 and 2020 for debt with similar terms and remaining maturities were used to estimate fair value for long-term debt. Changes in the assumptions will produce differing results. 2021 2020 (dollars in thousands) Carrying Amount Fair Value Carrying Amount Fair Value Long-term debt—GSWC (1) $ 415,788 $ 490,852 $ 444,271 $ 559,752 (1) Excludes debt issuance costs and redemption premiums.
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]	The following table sets forth by level, within the fair value hierarchy, GSWC’s long-term debt measured at fair value as of December 31, 2021: (dollars in thousands) Level 1 Level 2 Level 3 Total Long-term debt—GSWC — $ 490,852 — $ 490,852

Revenues (Tables)

Revenues (Tables)	12 Months Ended
Revenues (Tables)	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue [Table Text Block]	(dollar in thousands) For The Year Ended December 31, 2021 For The Year Ended December 31, 2020 For The Year Ended December 31, 2019 Water: Tariff-based revenues $ 345,562 $ 329,670 $ 305,244 CPUC-approved surcharges (cost-recovery activities) 3,280 3,736 4,322 Other 2,227 2,100 2,006 Water revenues from contracts with customers 351,069 335,506 311,572 WRAM (over)/under-collection (alternative revenue program) (3,957) (4,869) 8,258 Total water revenues 347,112 330,637 319,830 Electric: Tariff-based revenues 37,124 35,283 36,628 CPUC-approved surcharges (cost-recovery activities) 310 686 410 Electric revenues from contracts with customers 37,434 35,969 37,038 BRRAM under-collection (alternative revenue program) 911 1,055 2,510 Total electric revenues 38,345 37,024 39,548 Contracted services: Water 71,210 74,898 59,868 Wastewater 42,186 45,684 54,623 Contracted services revenues from contracts with customers 113,396 120,582 114,491 Total revenues $ 498,853 $ 488,243 $ 473,869
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]	The opening and closing balances of the receivable from the U.S. government, contract assets and contract liabilities from contracts with customers, which related entirely to ASUS, are as follows: (dollar in thousands) December 31, 2021 December 31, 2020 Unbilled receivables $ 14,835 $ 14,924 Receivable from the U.S. government $ 79,818 $ 74,670 Contract assets $ 9,587 $ 10,257 Contract liabilities $ 257 $ 1,800

Regulatory Matters (Tables)

Regulatory Matters (Tables)	12 Months Ended
Regulatory Matters (Tables)	Dec. 31, 2021
Regulated Operations [Abstract]
Schedule of regulatory assets, less regulatory liabilities in the consolidated balance sheets for continuing operations	: December 31, (dollars in thousands) 2021 2020 GSWC Water Revenue Adjustment Mechanism, net of the Modified Cost Balancing Account $ 13,326 $ 13,741 Costs deferred for future recovery on Aerojet case 5,210 6,751 Pensions and other post-retirement obligations (Note 12) 25,212 65,576 COVID-19 memorandum account 1,663 4,119 Other regulatory assets 11,739 10,670 Excess deferred income taxes (Note 11) (73,000) (74,185) Flow-through taxes, net (Note 11) (5,552) (9,722) Various refunds to customers (2,680) (4,577) Total GSWC $ (24,082) $ 12,373 BVESI Derivative unrealized (gain) loss (Note 5) (4,441) 1,537 Other regulatory assets 13,916 9,451 Various refunds to customers (8,189) (6,822) Total AWR $ (22,796) $ 16,539

Utility Plant and Intangible _2

Utility Plant and Intangible Assets (Tables)	12 Months Ended
Utility Plant and Intangible Assets (Tables)	Dec. 31, 2021
Utility Plant and Intangible Assets
Schedule of Public Utility Property Plant and Equipment Components [Table Text Block]	The following table shows Registrant’s utility plant (regulated utility plant and non-regulated utility property) by major asset class: AWR GSWC (dollars in thousands) 2021 2020 2021 2020 Water Land $ 18,207 $ 18,234 $ 18,207 $ 18,234 Intangible assets 29,028 28,906 29,028 28,906 Source of water supply 98,244 92,166 98,244 92,166 Pumping 209,936 190,901 209,936 190,901 Water treatment 83,922 81,272 83,922 81,272 Transmission and distribution 1,356,649 1,277,361 1,356,649 1,277,361 Other 139,895 128,877 102,831 95,562 1,935,881 1,817,717 1,898,817 1,784,402 Electric (Note 20) Transmission and distribution 90,491 87,461 — — Generation 12,583 12,583 — — Other (1) 13,398 12,463 — — 116,472 112,507 — — Less — accumulated depreciation (594,264) (568,326) (522,672) (502,283) Construction work in progress 167,915 150,145 123,600 118,370 Net utility plant $ 1,626,004 $ 1,512,043 $ 1,499,745 $ 1,400,489 (1) Includes intangible assets of $1.2 million for the years ended December 31, 2021 and 2020 for studies performed in association with the electric segment.
Schedule of components of intangible assets	As of December 31, 2021 and 2020, intangible assets consist of the following: Weighted Average Amortization AWR December 31, GSWC December 31, (dollars in thousands) Period 2021 2020 2021 2020 Intangible assets : Conservation programs 3 years $ 9,486 $ 9,486 $ 9,486 $ 9,486 Water and service rights (2) 30 years 8,695 8,694 8,124 8,124 Water planning studies 14 years 12,258 12,141 11,019 10,898 Total intangible assets 30,439 30,321 28,629 28,508 Less — accumulated amortization (26,401) (24,460) (25,109) (24,305) Intangible assets, net of amortization $ 4,038 $ 5,861 $ 3,520 $ 4,203 Intangible assets not subject to amortization (3) $ 400 $ 399 $ 399 $ 399
Schedule of estimated future consolidated amortization expenses related to intangible assets	Estimated future consolidated amortization expense related to intangible assets for the succeeding five years are (in thousands): Amortization 2022 $ 672 2023 672 2024 672 2025 672 2026 672 Total $ 3,360
Schedule of reconciliation of the beginning and ending aggregate carrying amount of the asset retirement obligations	The following is a reconciliation of the beginning and ending aggregate carrying amount of asset retirement obligations, which are included in “Other Credits” on the balance sheets as of December 31, 2021 and 2020: (dollars in thousands) GSWC Obligation at December 31, 2019 $ 8,863 Additional liabilities incurred 165 Liabilities settled (58) Accretion 350 Obligation at December 31, 2020 $ 9,320 Additional liabilities incurred 148 Liabilities settled (120) Accretion 369 Obligation at December 31, 2021 $ 9,717

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
Derivative Instruments (Tables)	Dec. 31, 2021
GSWC
Derivative instruments
Schedule of changes in the fair value of the derivative	The following table presents changes in the fair value of BVESI’s derivatives for the years 2021 and 2020: (dollars in thousands) 2021 2020 Balance, at beginning of the period $ (1,537) $ (3,171) Unrealized gain on purchased power contracts 5,978 1,634 Balance, at end of the period $ 4,441 $ (1,537)

Earnings Per Share and Capita_2

Earnings Per Share and Capital Stock (Tables)	12 Months Ended
Earnings Per Share and Capital Stock (Tables)	Dec. 31, 2021
Earnings Per Share [Abstract]
Schedule of reconciliation of Registrant's net income and weighted average Common Shares outstanding for calculating basic net income per share	The following is a reconciliation of Registrant’s net income and weighted average Common Shares outstanding for calculating basic net income per share: Basic: For The Years Ended December 31, (in thousands, except per share amounts) 2021 2020 2019 Net income $ 94,347 $ 86,425 $ 84,342 Less: (a) Distributed earnings to common shareholders 51,689 47,206 42,702 Distributed earnings to participating securities 134 158 180 Undistributed earnings 42,524 39,061 41,460 (b) Undistributed earnings allocated to common shareholders 42,414 38,930 41,285 Undistributed earnings allocated to participating securities 110 131 175 Total income available to common shareholders, basic (a)+(b) $ 94,103 $ 86,136 $ 83,987 Weighted average Common Shares outstanding, basic 36,921 36,880 36,814 Basic earnings per Common Share $ 2.55 $ 2.34 $ 2.28
Schedule of reconciliation of Registrant's net income and weighted average Common Shares outstanding for calculating diluted net income per share	The following is a reconciliation of Registrant’s net income and weighted average Common Shares outstanding for calculating diluted net income per share: Diluted: For The Years Ended December 31, (in thousands, except per share amounts) 2021 2020 2019 Common shareholders earnings, basic $ 94,103 $ 86,136 $ 83,987 Undistributed earnings for dilutive stock options and restricted stock units 110 131 175 Total common shareholders earnings, diluted $ 94,213 $ 86,267 $ 84,162 Weighted average Common Shares outstanding, basic 36,921 36,880 36,814 Stock-based compensation (1) 89 115 150 Weighted average Common Shares outstanding, diluted 37,010 36,995 36,964 Diluted earnings per Common Share $ 2.55 $ 2.33 $ 2.28 (1) In applying the treasury stock method of reflecting the dilutive effect of outstanding stock-based compensation in the calculation of diluted EPS, 100,020 restricted stock units, including performance awards, at December 31, 2021 were deemed to be outstanding in accordance with accounting guidance on earnings per share.

Bank Debt (Tables)

Bank Debt (Tables)	12 Months Ended
Bank Debt (Tables)	Dec. 31, 2021
Bank Debt
Schedule of Short-term Debt	Registrant’s borrowing activities (excluding letters of credit) for the years ended December 31, 2021 and 2020 were as follows: December 31, (in thousands, except percent) 2021 2020 Balance Outstanding at December 31, $ 205,500 $ 134,200 Interest Rate at December 31, 0.78% ~ 1.61% 1.19% ~ 1.90% Average Amount Outstanding $ 165,167 $ 162,995 Weighted Average Annual Interest Rate 1.05 % 1.47 % Maximum Amount Outstanding $ 205,500 $ 249,200 AWR’s (parent) borrowing activities (excluding letters of credit) for the years ended December 31, 2021 and 2020 were as follows: December 31, (in thousands, except percent) 2021 2020 Balance Outstanding at December 31, $ 174,500 $ 114,000 Interest Rate at December 31, 0.78 % 1.19 % Average Amount Outstanding 139,926 160,495 Weighted Average Annual Interest Rate 0.91 % 1.47 % Maximum Amount Outstanding $ 174,500 $ 249,000

Long-Term Debt (Tables)

Long-Term Debt (Tables)	12 Months Ended
Long-Term Debt (Tables)	Dec. 31, 2021
Debt Disclosure [Abstract]
Schedule of annual maturities of all long-term debt, including capitalized leases	Annual maturities of all long-term debt at December 31, 2021 are as follows (in thousands): 2022 $ 377 2023 400 2024 421 2025 441 2026 460 Thereafter 413,689 Total $ 415,788

Taxes on Income (Tables)

Taxes on Income (Tables)	12 Months Ended
Taxes on Income (Tables)	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Schedule of significant components of the deferred tax assets and liabilities from continuing operations	The significant components of the deferred tax assets and liabilities as reflected in the balance sheets at December 31, 2021 and 2020 are: AWR GSWC December 31, December 31, (dollars in thousands) 2021 2020 2021 2020 Deferred tax assets: Regulatory-liability-related (1) $ 32,220 $ 32,640 $ 30,410 $ 30,782 Contributions and advances 6,850 6,390 7,227 6,771 Other 5,324 6,092 5,689 6,663 Total deferred tax assets $ 44,394 $ 45,122 $ 43,326 $ 44,216 Deferred tax liabilities: Fixed assets $ (150,290) $ (146,688) $ (144,719) $ (141,422) Regulatory-asset-related: depreciation and other (25,914) (22,205) (24,858) (21,060) Balancing and memorandum accounts (non-flow-through) (8,480) (7,401) (6,063) (6,315) Total deferred tax liabilities (184,684) (176,294) (175,640) (168,797) Accumulated deferred income taxes, net $ (140,290) $ (131,172) $ (132,314) $ (124,581)
Schedule of current and deferred components of income tax expense from continuing operations	The current and deferred components of income tax expense are as follows: AWR Year Ended December 31, (dollars in thousands) 2021 2020 2019 Current Federal $ 19,592 $ 19,240 $ 12,507 State 7,270 6,714 5,540 Total current tax expense $ 26,862 $ 25,954 $ 18,047 Deferred Federal $ 2,802 $ 1,814 $ 6,407 State 759 429 216 Total deferred tax (benefit) expense 3,561 2,243 6,623 Total income tax expense $ 30,423 $ 28,197 $ 24,670 GSWC Year Ended December 31, (dollars in thousands) 2021 2020 2019 Current Federal $ 13,698 $ 14,674 $ 9,616 State 6,089 5,849 5,480 Total current tax expense $ 19,787 $ 20,523 $ 15,096 Deferred Federal $ 2,251 $ 949 $ 4,924 State 57 232 157 Total deferred tax (benefit) expense 2,308 1,181 5,081 Total income tax expense $ 22,095 $ 21,704 $ 20,177
Schedule of reconciliations of the effective tax rates to the federal statutory rate	: AWR Year Ended December 31, (dollars in thousands) 2021 2020 2019 Federal taxes on pretax income at statutory rate $ 26,202 $ 24,071 $ 22,872 Increase (decrease) in taxes resulting from: State income tax, net of federal benefit 6,425 5,764 4,758 Excess deferred tax amortization (1,356) (1,550) (1,579) Flow-through on fixed assets 1,069 1,056 1,244 Flow-through on removal costs (1,962) (1,031) (1,582) Investment tax credit (71) (71) (71) Other – net 116 (42) (972) Total income tax expense from operations $ 30,423 $ 28,197 $ 24,670 Pretax income from operations $ 124,770 $ 114,622 $ 109,012 Effective income tax rate 24.4 % 24.6 % 22.6 % . GSWC Year Ended December 31, (dollars in thousands) 2021 2020 2019 Federal taxes on pretax income at statutory rate $ 19,175 $ 18,202 $ 18,236 Increase (decrease) in taxes resulting from: State income tax, net of federal benefit 4,923 4,920 4,656 Excess deferred tax amortization (1,184) (1,477) (1,579) Flow-through on fixed assets 1,008 1,042 1,244 Flow-through on removal costs (1,954) (1,026) (1,582) Investment tax credit (71) (71) (71) Other – net 198 114 (727) Total income tax expense from operations $ 22,095 $ 21,704 $ 20,177 Pretax income from operations $ 91,310 $ 86,675 $ 86,840 Effective income tax rate 24.2 % 25.0 % 23.2 %

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
Employee Benefit Plans (Tables)	Dec. 31, 2021
Retirement Benefits [Abstract]
Schedule of Pension Plan's funded status and amounts recognized in balance sheets and the components of net pension cost and accrued post-retirement liability	The following table sets forth the Pension Plan’s and post-retirement medical plan’s funded status and amounts recognized in Registrant’s balance sheets and the components of net pension cost and accrued liability at December 31, 2021 and 2020: Pension Benefits Post-Retirement Medical (dollars in thousands) 2021 2020 2021 2020 Change in Projected Benefit Obligation: Projected benefit obligation at beginning of year $ 272,786 $ 231,852 $ 5,906 $ 7,395 Service cost 6,316 5,558 149 171 Interest cost 6,833 7,880 110 208 Actuarial (gain) loss (17,682) 35,453 (3,165) (1,604) Benefits/expenses paid (8,502) (7,957) (314) (264) Projected benefit obligation at end of year $ 259,751 $ 272,786 $ 2,686 $ 5,906 Changes in Plan Assets: Fair value of plan assets at beginning of year $ 213,147 $ 192,477 $ 12,313 $ 11,271 Actual return on plan assets 25,390 24,909 1,773 1,307 Employer contributions 3,489 3,718 242 269 Benefits/expenses paid (8,502) (7,957) (555) (534) Fair value of plan assets at end of year $ 233,524 $ 213,147 $ 13,773 $ 12,313 Funded Status: Net amount recognized as accrued pension cost $ (26,227) $ (59,639) $ 11,087 $ 6,407 Pension Benefits Post-Retirement (dollars in thousands) 2021 2020 2021 2020 Amounts recognized on the balance sheets: Non-current assets $ — $ — $ 11,087 $ 6,407 Current liabilities — — — — Non-current liabilities (26,227) (59,639) — — Net amount recognized $ (26,227) $ (59,639) $ 11,087 $ 6,407 Amounts recognized in regulatory assets consist of: Prior service cost (credit) $ 2,323 $ 2,757 $ — $ — Net (gain) loss 23,368 57,716 (9,839) (6,855) Regulatory assets (liabilities) 25,691 60,473 (9,839) (6,855) Unfunded accrued pension cost 536 (834) (1,248) 448 Net liability (asset) recognized $ 26,227 $ 59,639 $ (11,087) $ (6,407) Changes in plan assets and benefit obligations recognized in regulatory assets: Regulatory asset at beginning of year $ 60,473 $ 40,500 $ (6,855) $ (5,432) Net loss (gain) (30,531) 22,343 (4,401) (2,400) New prior service cost — — — — Amortization of prior service (cost) credit (434) (435) — — Amortization of net gain (loss) (3,817) (1,935) 1,417 977 Total change in regulatory asset (34,782) 19,973 (2,984) (1,423) Regulatory asset (liability) at end of year $ 25,691 $ 60,473 $ (9,839) $ (6,855) Net periodic pension costs $ 4,859 $ 4,010 $ (1,695) $ (1,108) Change in regulatory asset (34,782) 19,973 (2,984) (1,423) Total recognized in net periodic pension cost and regulatory asset (liability) $ (29,923) $ 23,983 $ (4,679) $ (2,531) Additional year-end information for plans with an accumulated benefit obligation in excess of plan assets: Projected benefit obligation $ 259,751 $ 272,786 $ 2,686 $ 5,906 Accumulated benefit obligation $ 243,412 $ 253,108 N/A N/A Fair value of plan assets $ 233,524 $ 213,147 $ 13,773 $ 12,313 Weighted-average assumptions used to determine benefit obligations at December 31: Discount rate 2.89 % 2.55 % 2.46 % 2.20 % Rate of compensation increase * * N/A N/A • Age-graded ranging from 3.0% to 8.0%. The following provides a reconciliation of benefit obligations, funded status of the SERP, as well as a summary of significant estimates at December 31, 2021 and 2020: (dollars in thousands) 2021 2020 Change in Benefit Obligation: Benefit obligation at beginning of year $ 36,602 $ 29,703 Service cost 1,392 1,029 Interest cost 915 988 Actuarial (gain) loss (2,213) 5,479 Benefits paid (607) (597) Benefit obligation at end of year $ 36,089 $ 36,602 Changes in Plan Assets: Fair value of plan assets at beginning and end of year — — Funded Status: Net amount recognized as accrued cost $ (36,089) $ (36,602) (in thousands) 2021 2020 Amounts recognized on the balance sheets: Current liabilities $ (949) $ (602) Non-current liabilities (35,140) (36,000) Net amount recognized $ (36,089) $ (36,602) Amounts recognized in regulatory assets consist of: Prior service cost $ — $ — Net loss 9,097 12,988 Regulatory assets 9,097 12,988 Unfunded accrued cost 26,992 23,614 Net liability recognized $ 36,089 $ 36,602 Changes in plan assets and benefit obligations recognized in regulatory assets consist of: Regulatory asset at beginning of year $ 12,988 $ 8,352 Net (gain) loss (2,213) 5,479 Amortization of prior service credit — — Amortization of net loss (1,678) (843) Total change in regulatory asset (3,891) 4,636 Regulatory asset at end of year $ 9,097 $ 12,988 Net periodic pension cost $ 3,985 $ 2,860 Change in regulatory asset (3,891) 4,636 Total recognized in net periodic pension and regulatory asset $ 94 $ 7,496 Additional year-end information for plans with an accumulated benefit obligation in excess of plan assets: Projected benefit obligation $ 36,089 $ 36,602 Accumulated benefit obligation 31,835 30,428 Fair value of plan assets — — Weighted-average assumptions used to determine benefit obligations: Discount rate 2.87 % 2.52 % Rate of compensation increase * 4.00 % * Age graded from 4.5% to 4.0% per year.
Schedule of components of net periodic pension and post-retirement benefits cost, before allocation to the overhead pool	The components of net periodic pension and post-retirement benefits cost, before allocation to the overhead pool, for 2021, 2020 and 2019 are as follows: Pension Benefits Post-Retirement (dollars in thousands, except percent) 2021 2020 2019 2021 2020 2019 Components of Net Periodic Benefits Cost: Service cost $ 6,316 $ 5,558 $ 4,441 $ 149 $ 171 $ 186 Interest cost 6,833 7,880 8,527 110 208 285 Expected return on plan assets (12,541) (11,798) (10,374) (537) (510) (449) Amortization of prior service cost (credit) 434 435 434 — — — Amortization of actuarial (gain) loss 3,817 1,935 1,419 (1,417) (977) (801) Net periodic pension cost under accounting standards $ 4,859 $ 4,010 $ 4,447 $ (1,695) $ (1,108) $ (779) Regulatory adjustment (1,277) (483) (593) — — — Total expense recognized, before surcharges and allocation to overhead pool $ 3,582 $ 3,527 $ 3,854 $ (1,695) $ (1,108) $ (779) Weighted-average assumptions used to determine net periodic cost: Discount rate 2.55 % 3.43 % 4.43 % 2.20 % 3.12 % 4.20 % Expected long-term return on plan assets 6.00 % 6.25 % 6.50 % * * * Rate of compensation increase ** N/A N/A N/A 5.75% for union plan and 4.0% for non-union (net of income taxes) in 2021, and 6.0% for union plan and 4.2% for non-union (net of income taxes) in 2020 and 2019. * Age-graded ranging from 3.0% to 8.0%. The components of SERP expense, before allocation to the overhead pool, for 2021, 2020 and 2019 are as follows: (dollars in thousands, except percent) 2021 2020 2019 Components of Net Periodic Benefits Cost: Service cost $ 1,392 $ 1,029 $ 1,193 Interest cost 915 988 1,069 Amortization of prior service cost — — — Amortization of net loss 1,678 843 471 Net periodic pension cost $ 3,985 $ 2,860 $ 2,733 Weighted-average assumptions used to determine net periodic cost: Discount rate 2.52 % 3.36 % 4.40 % Rate of compensation increase * 4.00 % 4.00 % * Age graded from 4.5% to 4.0% per year.
Schedule of actual allocation of plan assets	The Committee approves the target asset allocations. Registrant’s pension and post-retirement plan weighted-average asset allocations at December 31, 2021 and 2020, by asset category are as follows: Pension Benefits Post-Retirement Asset Category 2021 2020 2021 2020 Actual Asset Allocations : Equity securities 56 % 59 % 60 % 63 % Debt securities 38 % 36 % 39 % 36 % Real Estate Funds 6 % 5 % — % — % Cash equivalents — % — % 1 % 1 % Total 100 % 100 % 100 % 100 %
Schedule of pension and post-retirement plan target asset allocations	Equity securities did not include AWR’s Common Shares as of December 31, 2021 and 2020. Target Asset Allocations: Pension Benefits Post-retirement Equity securities 60 % 60 % Debt securities 40 % 40 % Total 100 % 100 %
Summary of fair value, measured by net asset value, of the pension investment assets	The following tables set forth the fair value, measured by net asset value, of the pension investment assets as of December 31, 2021 and 2020: Net Asset Value as of December 31, 2021 (dollars in thousands) Fair Value Unfunded Commitments Redemption Frequency Redemption Notice Period Cash equivalents $ 637 — N/A N/A Fixed income fund 87,760 — Daily Daily Equity securities : U.S. small/mid cap funds 58,451 — Daily Daily U.S. large cap funds 22,143 — Daily Daily International funds 50,961 — Daily Daily Total equity funds 131,555 — Real estate funds 13,572 — Daily Daily Total $ 233,524 — Net Asset Value as of December 31, 2020 (dollars in thousands) Fair Value Unfunded Commitments Redemption Frequency Redemption Notice Period Cash equivalents $ 589 — N/A N/A Fixed income fund 76,221 — Daily Daily Equity securities : U.S. small/mid cap funds 21,837 — Daily Daily U.S. large cap funds 53,677 — Daily Daily International funds 50,488 — Daily Daily Total equity funds 126,002 Real estate funds 10,335 — Daily Daily Total $ 213,147 —
Schedule of pension and post-retirement plans' investment assets measured at fair value	The following tables set forth by level, within the fair value hierarchy, the post-retirement plan's investment assets measured at fair value as of December 31, 2021 and 2020: Fair Value as of December 31, 2021 (dollars in thousands) Level 1 Level 2 Level 3 Total Fair Value of Post-Retirement Plan Assets: Cash equivalents $ 92 — — $ 92 Fixed income 5,409 — — 5,409 U.S. equity securities 8,272 — — 8,272 Total investments measured at fair value $ 13,773 — — $ 13,773 Fair Value as of December 31, 2020 (dollars in thousands) Level 1 Level 2 Level 3 Total Fair Value of Post-Retirement Plan Assets: Cash equivalents $ 169 — — $ 169 Fixed income 4,436 — — 4,436 U.S. equity securities 7,707 — — 7,707 Total investments measured at fair value $ 12,312 — — $ 12,312 The following tables set forth by level, within the fair value hierarchy, the Rabbi Trust investment assets measured at fair value as of December 31, 2021 and 2020: Fair Value as of December 31, 2021 (dollars in thousands) Level 1 Level 2 Level 3 Total Fair Value of Assets held in Rabbi Trust: Cash equivalents $ 8 — — $ 8 Fixed income securities 12,442 — — 12,442 Equity securities 19,018 — — 19,018 Total investments measured at fair value $ 31,468 — — $ 31,468 Fair Value as of December 31, 2020 (dollars in thousands) Level 1 Level 2 Level 3 Total Fair Value of Assets held in Rabbi Trust: Cash equivalents $ 8 — — $ 8 Fixed income securities 10,201 — — 10,201 Equity securities 15,703 — — 15,703 Total investments measured at fair value $ 25,912 — — $ 25,912
Schedule of estimated future benefit payments	Estimated future benefit payments at December 31, 2021 for the next five years and thereafter are as follows (in thousands): Pension Benefits Post-Retirement Medical Benefits 2022 $ 8,983 $ 327 2023 9,598 314 2024 10,347 292 2025 10,844 285 2026 11,280 260 Thereafter 64,368 869 Total $ 115,420 $ 2,347 Benefit Payments : Estimated future benefit payments for the SERP at December 31, 2021 for the next five years and thereafter are as follows (in thousands): 2022 $ 949 2023 944 2024 1,195 2025 1,187 2026 2,154 Thereafter 11,444 Total $ 17,873

Stock-Based Compensation Plans

Stock-Based Compensation Plans (Tables)	12 Months Ended
Stock-Based Compensation Plans (Tables)	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Schedule of share-based compensation expenses	The following table presents share-based compensation expenses for the years ended December 31, 2021, 2020 and 2019. These expenses resulting from restricted stock units, including performance awards, are included in administrative and general expenses in AWR's and GSWC’s statements of income: AWR GSWC For The Years Ended December 31, For The Years Ended December 31, (in thousands) 2021 2020 2019 2021 2020 2019 Stock-based compensation related to: Restricted stock units $ 2,566 $ 2,463 $ 2,517 $ 2,313 $ 2,349 $ 2,253 Total stock-based compensation expense $ 2,566 $ 2,463 $ 2,517 $ 2,313 $ 2,349 $ 2,253
Schedule of assumptions used to estimate fair value of each option grant on the grant date using the Black-Scholes option-pricing model	will be earned based on Registrant’s TSR compared to the TSR for a specific peer group of investor-owned water companies. A summary of the status of Registrant’s outstanding performance awards to officers as of December 31, 2021, and changes during the year ended December 31, 2021, is presented below: Number of Weighted Average Performance awards at January 1, 2021 57,960 $ 66.4 Granted 19,873 79.43 Performance criteria adjustment (1,775) 109.09 Vested (26,258) 56.49 Forfeited (890) 79.29 Performance awards at December 31, 2021 48,910 $ 75.23
Summary of the status of Registrant's outstanding restricted stock units to employees and directors	A summary of the status of Registrant’s outstanding RSUs, excluding performance awards, to employees and directors as of December 31, 2021, and changes during the year ended December 31, 2021, is presented below: Number of Weighted Average Restricted share units at January 1, 2021 69,339 $ 53.33 Granted 21,765 79.38 Vested (38,208) 74.15 Forfeited (1,786) 82.87 Restricted share units at December 31, 2021 51,110 $ 47.83

Commitments (Tables)

Commitments (Tables)	12 Months Ended
Commitments (Tables)	Dec. 31, 2021
Risks and Uncertainties [Abstract]
Schedule of estimated future minimum payments under purchased water supply commitments	GSWC’s estimated future minimum payments under these purchased water supply commitments at December 31, 2021 are as follows (in thousands): 2022 $ 436 2023 436 2024 436 2025 391 2026 346 Thereafter 1,345 Total $ 3,390

Leases (Tables)

Leases (Tables)	12 Months Ended
Leases (Tables)	Dec. 31, 2021
Leases [Abstract]
Supplemental lease information	Registrant's supplemental lease information for the year ended December 31, 2021 is as follows (in thousands, except for weighted average data): For The Year Ended December 31, 2021 For The Year Ended December 31, 2020 Operating lease costs $2,627 $2,873 Short-term lease costs 273 143 Weighted average remaining lease term (in years) 5.99 6.62 Weighted-average discount rate 3.7% 3.6% Non-cash transactions Lease liabilities arising from obtaining right-of-use assets $1,430 $27
Maturities of operating lease liabilities	Registrant’s future minimum payments under long-term non-cancelable operating leases as of December 31, 2021 are as follows (in thousands): 2022 $ 2,548 2023 2,135 2024 1,821 2025 1,651 2026 1,456 Thereafter 2,801 Total lease payments 12,412 Less: imputed interest 1,448 Total lease obligations 10,964 Less: current obligations 2,044 Long-term lease obligations $ 8,920

Business Segments (Tables)

Business Segments (Tables)	12 Months Ended
Business Segments (Tables)	Dec. 31, 2021
Segment Reporting [Abstract]
Schedule of reporting segments information	Capital additions reflect capital expenditures paid in cash and exclude U.S. government-funded and third-party prime funded capital expenditures for ASUS and property installed by developers and conveyed to GSWC and BVESI. As Of And For The Year Ended December 31, 2021 AWR Consolidated (dollars in thousands) Water Electric ASUS Parent AWR Operating revenues $ 347,112 $ 38,345 $ 113,396 $ — $ 498,853 Operating income (loss) 107,573 10,738 22,675 (9) 140,977 Interest expense, net 21,046 141 (637) 791 21,341 Utility Plant 1,499,745 106,508 19,751 — 1,626,004 Depreciation and amortization expense (1) 33,384 2,572 3,640 — 39,596 Income tax expense (benefit) 22,095 2,975 5,434 (81) 30,423 Capital additions 123,526 19,859 1,130 — 144,515 As Of And For The Year Ended December 31, 2020 AWR Consolidated (dollars in thousands) Water Electric ASUS Parent AWR Operating revenues $ 330,637 $ 37,024 $ 120,582 $ — $ 488,243 Operating income (loss) 97,896 10,303 22,309 (9) 130,499 Interest expense, net 20,312 584 (496) 330 20,730 Utility Plant 1,400,489 89,308 22,246 — 1,512,043 Depreciation and amortization expense (1) 30,969 2,479 3,402 — 36,850 Income tax expense/(benefit) 20,515 2,689 5,201 (208) 28,197 Capital additions 107,355 18,393 4,675 — 130,423 As Of And For The Year Ended December 31, 2019 GSWC AWR Consolidated (dollars in thousands) Water Electric ASUS Parent AWR Operating revenues $ 319,830 $ 39,548 $ 114,491 $ — $ 473,869 Operating income (loss) 93,895 11,197 21,990 (9) 127,073 Interest expense, net 20,304 1,228 (734) 539 21,337 Utility Plant 1,322,062 72,680 20,963 — 1,415,705 Depreciation and amortization expense (1) 29,956 2,485 2,956 — 35,397 Income tax expense/(benefit) 17,295 2,882 5,202 (709) 24,670 Capital additions 131,353 11,499 9,088 — 151,940
Schedule of reconciliation of total utility plant (a key figure for rate-making) to total consolidated assets	The following table reconciles total utility plant (a key figure for rate-making) to total consolidated assets (in thousands): December 31, 2021 2020 Total utility plant $ 1,626,004 $ 1,512,043 Other assets 274,979 279,560 Total consolidated assets $ 1,900,983 $ 1,791,603

Allowance for Doubtful Accoun_2

Allowance for Doubtful Accounts (Tables)	12 Months Ended
Allowance for Doubtful Accounts (Tables)	Dec. 31, 2021
Allowance for Doubtful Accounts
Schedule of provision for doubtful accounts charged to expense and accounts written off, net of recoveries	The table below presents Registrant’s provision for doubtful accounts charged to expense and accounts written off, net of recoveries. Provisions included in 2021, 2020 and 2019 for AWR and GSWC are as follows: AWR December 31, (dollars in thousands) 2021 2020 2019 Balance at beginning of year $ 5,316 $ 916 $ 951 Provision charged (1) 8,150 5,016 609 Accounts written off, net of recoveries (2) (9,897) (616) (644) Balance at end of year $ 3,569 $ 5,316 $ 916 Allowance for doubtful accounts related to accounts receivable-customer $ 3,516 $ 5,263 $ 857 Allowance for doubtful accounts related to other accounts receivable 53 53 59 Total allowance for doubtful accounts $ 3,569 $ 5,316 $ 916 (1) Includes amounts in excess of GSWC's and BVESI's respective revenue requirements incurred during the COVID-19 pandemic. These incremental amounts are recorded as regulatory assets. (2) Reflects consideration of government relief funds received in 2022 from the state of California for unpaid water and electric utility bills incurred during the pandemic. A total of $9.5 million and $321,000 was received in 2022 for unpaid water and electric utility bills, respectively. GSWC December 31, (dollars in thousands) 2021 2020 2019 Balance at beginning of year $ 4,960 $ 916 $ 951 Provision charged (3) 7,732 4,703 607 Balance transfer to BVESI (Note 20) — (79) — Accounts written off, net of recoveries (4) (9,471) (580) (642) Balance at end of year $ 3,221 $ 4,960 $ 916 Allowance for doubtful accounts related to accounts receivable-customer $ 3,168 $ 4,907 $ 857 Allowance for doubtful accounts related to other accounts receivable 53 53 59 Total allowance for doubtful accounts $ 3,221 $ 4,960 $ 916

Statement of Cash Flows, Supp_2

Statement of Cash Flows, Supplemental Disclosures (Tables)	12 Months Ended
Statement of Cash Flows, Supplemental Disclosures (Tables)	Dec. 31, 2021
Supplemental Cash Flow Elements [Abstract]
Schedule of non-cash financing and investing activities and other cash flow information	The following table sets forth non-cash financing and investing activities and other cash flow information (in thousands). AWR GSWC December 31, December 31, 2021 2020 2019 2021 2020 2019 Taxes and Interest Paid: Income taxes paid, net $ 29,153 $ 13,684 $ 22,496 $ 21,428 $ 8,184 $ 17,206 Interest paid, net of capitalized interest 22,540 19,941 25,080 21,156 19,681 23,925 Non-Cash Transactions: Accrued payables for investment in utility plant 32,855 27,861 23,736 30,656 25,633 23,736 Property installed by developers and conveyed 7,222 3,102 6,220 7,222 3,102 6,220 Transfer of electric segment net assets (net of cash) for BVESI common shares (Note 20) — — — — 71,324 — Distribution of BVESI common shares to AWR parent (Note 20) — — — — 71,344 —

Completion of Electric Utilit_2

Completion of Electric Utility Reorganization Plan (Tables)	12 Months Ended
Completion of Electric Utility Reorganization Plan (Tables)	Dec. 31, 2021
Restructuring and Related Activities [Abstract]
Completion of Electric Utility Reorganization Plan-selected information for the results of operations and its cashflow	The table below sets forth selected information relating to the electric segment's results of operations for 2021, and for the six month periods ended June 30, 2020 and December 31, 2020 (in thousands): Twelve months ended December 31, 2021 Six months ended June 30, 2020 Six months ended December 31, 2020 Twelve months ended December 31, 2020 (Subsidiary of AWR) (Division of GSWC) (Subsidiary of AWR) Electric revenues $ 38,345 $ 18,647 $ 18,377 $ 37,024 Operating expenses 27,607 13,647 13,074 26,721 Operating income 10,738 5,000 5,303 10,303 Net income $ 7,864 $ 3,408 $ 3,870 $ 7,278 The table below sets forth selected information relating to the electric segment's cash flows for 2021, as well as the six months ended December 31, 2020. Prior to July 1, 2020, the electric segment's cash flows were included in GSWC's cash flows. For the Twelve Months Ended December 31, 2021 Six Months Ended December 31, 2020 (Subsidiary of AWR) (Subsidiary of AWR) Net cash provided from operating activities $ 9,128 $ 1,887 Net cash used in investing activities (capital expenditures) (19,859) (9,339) Net cash provided from financing activities (1) 10,827 7,799 Net change in cash and cash equivalents 96 347 Cash and cash equivalents, beginning of period 367 20 Cash and cash equivalents, end of period $ 463 $ 367

SCHEDULE I - CONDENSED FINANC_2

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT (Tables)	12 Months Ended
	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Schedule of Short-term Debt	Registrant’s borrowing activities (excluding letters of credit) for the years ended December 31, 2021 and 2020 were as follows: December 31, (in thousands, except percent) 2021 2020 Balance Outstanding at December 31, $ 205,500 $ 134,200 Interest Rate at December 31, 0.78% ~ 1.61% 1.19% ~ 1.90% Average Amount Outstanding $ 165,167 $ 162,995 Weighted Average Annual Interest Rate 1.05 % 1.47 % Maximum Amount Outstanding $ 205,500 $ 249,200 AWR’s (parent) borrowing activities (excluding letters of credit) for the years ended December 31, 2021 and 2020 were as follows: December 31, (in thousands, except percent) 2021 2020 Balance Outstanding at December 31, $ 174,500 $ 114,000 Interest Rate at December 31, 0.78 % 1.19 % Average Amount Outstanding 139,926 160,495 Weighted Average Annual Interest Rate 0.91 % 1.47 % Maximum Amount Outstanding $ 174,500 $ 249,000

Summary of Significant Accoun_4

Summary of Significant Accounting Policies (Details)	6 Months Ended	12 Months Ended
Summary of Significant Accounting Policies (Details)	Dec. 31, 2020USD ($)	Dec. 31, 2021USD ($)customerregistrantshares	Dec. 31, 2020USD ($)shares	Dec. 31, 2019USD ($)shares	Feb. 02, 2022USD ($)	Jan. 26, 2022USD ($)	Jul. 12, 2021USD ($)
Nature of Operations:
Number of customers served \| customer		1,000,000
Number of States in which Entity Operates		9
Number of registrants filing combined report \| registrant		2
Related Party Transactions
Related Party Transaction, Amounts of Transaction		$ 5,300,000	$ 4,900,000	$ 4,700,000
Exercise of stock options and other issuance of Common Shares		0	30,000	519,000
Line of credit facility, current borrowing capacity		200,000,000
Impairment of Long-Lived Assets
Asset Retirement Obligation, Legally Restricted Assets, Fair Value		0
Impairment of long-lived assets		0	0	0
Goodwill
Goodwill arose from acquisition of subcontractor's business		$ 1,100,000	1,100,000
Advances for Construction and Contributions in aid of Constructions
Period for refund of advances for construction		40 years
Common Stock [Member]
Related Party Transactions
Exercise of stock options and other issuance of Common Shares		$ 0	$ 30,000	$ 519,000
Stock Issued During Period, Shares, New Issues \| shares		47,000	42,000	89,000
GSWC
Related Party Transactions
Exercise of stock options and other issuance of Common Shares		$ 60,000,000	$ 60,000,000
Regulatory Asset CEMA		$ 1,700,000
Property and Depreciation
Aggregate composite rate for depreciation (as a percent)		2.20%	2.20%	2.20%
Depreciation		$ 35,500,000	$ 32,900,000	$ 31,700,000
Depreciation on transportation equipment		$ 379,000	353,000	$ 316,000
Estimated useful lives of utility plant, as authorized by the CPUC
Generation		40 years
Fair Value of Financial Instruments
Long-term debt-GSWC		$ 490,852,000
Short-term Debt, Terms		24
Approval amount for the relief funding		$ 9,500,000
Intercompany payables	$ 0	49,280,000	0
Water Utility Relief Funding For Overdue Water Bills Per Budget Act Of 2021							$ 1,000,000,000
GSWC \| Subsequent Event
Fair Value of Financial Instruments
Relief funding						$ 9,500,000
GSWC \| Level 1
Fair Value of Financial Instruments
Long-term debt-GSWC		0
GSWC \| Level 3
Fair Value of Financial Instruments
Long-term debt-GSWC		0
GSWC \| Carrying Amount
Fair Value of Financial Instruments
Long-term debt-GSWC	444,271,000	415,788,000	444,271,000
GSWC \| Fair Value
Fair Value of Financial Instruments
Long-term debt-GSWC	559,752,000		$ 559,752,000
GSWC \| Fair Value \| Level 2
Fair Value of Financial Instruments
Long-term debt-GSWC		$ 490,852,000
GSWC \| Minimum
Estimated useful lives of utility plant, as authorized by the CPUC
Source of water supply		30 years
Pumping		25 years
Water treatment		20 years
Transmission and Distribution		25 years
Other plant		7 years
GSWC \| Maximum
Estimated useful lives of utility plant, as authorized by the CPUC
Source of water supply		50 years
Pumping		40 years
Water treatment		35 years
Transmission and Distribution		55 years
Other plant		40 years
GSWC \| Common Stock [Member]
Related Party Transactions
Exercise of stock options and other issuance of Common Shares		$ 60,000,000
Stock Issued During Period, Shares, New Issues \| shares		0	5
Bear Valley Electric Service, Inc.
Related Party Transactions
Related Party Transaction, Amounts of Transaction	1,300,000	$ 2,800,000
Regulatory Asset CEMA		302,000
Interest
Public Utilities, Allowance for Funds Used During Construction, Additions		216,000	$ 200,000
Fair Value of Financial Instruments
Notes Payable		31,000,000
Notes Payable		31,000,000
Bear Valley Electric Service, Inc. \| Subsequent Event
Fair Value of Financial Instruments
Relief funding					$ 321,000
Parent
Related Party Transactions
Line of credit facility, current borrowing capacity		30,000,000
Notes receivable, related parties	$ 6,000,000	26,000,000	$ 6,000,000
Notes payable, related parties		$ 0
Water: \| GSWC
Nature of Operations:
Number of customers served \| customer		262,800
Electric: \| Bear Valley Electric Service, Inc.
Nature of Operations:
Number of customers served \| customer		24,700
Contracted services: \| American States Utility Services
Nature of Operations:
Period of fixed price contracts to operate and maintain the water and/or wastewater systems at various military bases		50 years

Revenues (Details)

Revenues (Details) - USD ($) $ in Thousands	12 Months Ended
Revenues (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue, Performance Obligation, Payment Terms	20 days
Cost of services	$ 56,909	$ 62,411	$ 55,673
GSWC
Disaggregation of Revenue [Line Items]
Period within which Expected Additional Revenue Collection is Recorded Subject to Undercollection of Revenue	24 months
Contracted services: \| American States Utility Services
Disaggregation of Revenue [Line Items]
Period of Fixed Price Contracts to Operate and Maintain Water Systems at Various Military Bases	50 years
Sales [Member] \| Water: \| GSWC \| Customer Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of total revenues	90.00%
Sales [Member] \| Electric: \| Golden State Water Company and Bear Valley Electric Service, Inc. [Member] \| Customer Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of total revenues	90.00%
Franchisor \| GSWC
Disaggregation of Revenue [Line Items]
Cost of services			$ 4,000
Franchisor \| Golden State Water Company and Bear Valley Electric Service, Inc. [Member]
Disaggregation of Revenue [Line Items]
Cost of services	$ 4,200	$ 3,800

Revenues Disaggregation of Reve

Revenues Disaggregation of Revenue (Details) $ in Thousands	6 Months Ended		12 Months Ended
Revenues Disaggregation of Revenue (Details) $ in Thousands	Dec. 31, 2020USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2021USD ($)unit	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Disaggregation of Revenue [Line Items]
Electric			$ 38,345	$ 37,024	$ 39,548
Operating revenues			498,853	488,243	473,869
GSWC
Disaggregation of Revenue [Line Items]
Electric			0	18,647	39,548
Operating revenues			347,112	349,284	359,378
GSWC \| Water:
Disaggregation of Revenue [Line Items]
Revenue from contract with customers			351,069	335,506	311,572
Operating revenues			347,112	330,637	319,830
GSWC \| Water: \| Tariff-based revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customers			345,562	329,670	305,244
GSWC \| Water: \| CPUC-approved surcharges (cost-recovery activities)
Disaggregation of Revenue [Line Items]
Revenue from contract with customers			3,280	3,736	4,322
GSWC \| Water: \| Other
Disaggregation of Revenue [Line Items]
Revenue from contract with customers			2,227	2,100	2,006
GSWC \| Water: \| Alternative revenue program
Disaggregation of Revenue [Line Items]
Regulated Operating Revenue			$ (3,957)	(4,869)	8,258
GSWC \| Electric:
Disaggregation of Revenue [Line Items]
Revenue from contract with customers					37,038
Electric					(2,510)
Operating revenues		$ 18,647		37,024	39,548
GSWC \| Electric: \| Tariff-based revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customers					36,628
GSWC \| Electric: \| CPUC-approved surcharges (cost-recovery activities)
Disaggregation of Revenue [Line Items]
Revenue from contract with customers					410
American States Utility Services \| Contracted services:
Disaggregation of Revenue [Line Items]
Period of Fixed Price Contracts to Operate and Maintain Water Systems at Various Military Bases			50 years
Revenue from contract with customers			$ 113,396	120,582	114,491
Operating revenues			$ 113,396	120,582	114,491
Number of construction performance obligation \| unit			1
American States Utility Services \| Contracted services: \| Water
Disaggregation of Revenue [Line Items]
Revenue from contract with customers			$ 71,210	74,898	59,868
American States Utility Services \| Contracted services: \| Wastewater
Disaggregation of Revenue [Line Items]
Revenue from contract with customers			42,186	45,684	$ 54,623
Golden State Water Company and Bear Valley Electric Service, Inc. [Member] \| Electric:
Disaggregation of Revenue [Line Items]
Revenue from contract with customers				35,969
Electric				1,055
Operating revenues				37,024
Golden State Water Company and Bear Valley Electric Service, Inc. [Member] \| Electric: \| Tariff-based revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customers				35,283
Golden State Water Company and Bear Valley Electric Service, Inc. [Member] \| Electric: \| CPUC-approved surcharges (cost-recovery activities)
Disaggregation of Revenue [Line Items]
Revenue from contract with customers				$ 686
Bear Valley Electric Service, Inc. \| Electric:
Disaggregation of Revenue [Line Items]
Revenue from contract with customers			37,434
Electric			911
Operating revenues	$ 18,377		38,345
Bear Valley Electric Service, Inc. \| Electric: \| Tariff-based revenues
Disaggregation of Revenue [Line Items]
Revenue from contract with customers			37,124
Bear Valley Electric Service, Inc. \| Electric: \| CPUC-approved surcharges (cost-recovery activities)
Disaggregation of Revenue [Line Items]
Revenue from contract with customers			$ 310

Revenues Contract assets and Co

Revenues Contract assets and Contract Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Contract with Customer, Asset and Liability [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 3,300,000
American States Utility Services
Contract with Customer, Asset and Liability [Line Items]
Unbilled Contracts Receivable	14,835	$ 14,924
Government Contract Receivable	79,818	74,670
Contract assets	9,587	10,257
Contract liabilities	$ 257	$ 1,800
Minimum \| American States Utility Services
Contract with Customer, Asset and Liability [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	33 years
Maximum \| American States Utility Services
Contract with Customer, Asset and Liability [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	47 years
Contracted services: \| American States Utility Services
Contract with Customer, Asset and Liability [Line Items]
Period of Fixed Price Contracts to Operate and Maintain Water Systems at Various Military Bases	50 years

Regulatory Matters (Details)

Regulatory Matters (Details) - USD ($)	12 Months Ended
Regulatory Matters (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Regulatory matters:
Regulatory Asset Not Accruing Carrying Costs	$ 61,400,000
Total	(22,796,000)	$ 16,539,000
Water Revenue Adjustment Mechanism [Member]
Regulatory matters:
Regulatory adjustment	7,100,000
Pension Costs and Other Postretirement Benefit Costs
Regulatory matters:
Regulatory Asset Not Accruing Carrying Costs	24,900,000
Flow-through taxes, net
Regulatory matters:
Total	(6,300,000)
Excess deferred income taxes
Regulatory matters:
Total	(77,000,000)
GSWC
Regulatory matters:
Total	(24,082,000)	12,373,000
Regulatory Asset CEMA	1,700,000
GSWC \| Various refunds to customers
Regulatory matters:
Total	(2,680,000)	(4,577,000)
GSWC \| WRAM, net of MCBA
Regulatory matters:
Total	13,326,000	13,741,000
GSWC \| Water Revenue Adjustment Mechanism [Member]
Regulatory matters:
Total	(3,800,000)
Deferred Revenues	0
GSWC \| Costs deferred for future recovery on Aerojet case
Regulatory matters:
Total	5,210,000	6,751,000
GSWC \| Pension Costs and Other Postretirement Benefit Costs
Regulatory matters:
Total	25,212,000	65,576,000
Regulatory Assets	25,000,000
GSWC \| COVID-19 memorandum account
Regulatory matters:
Total	1,663,000	4,119,000
GSWC \| Flow-through taxes, net
Regulatory matters:
Total	(5,552,000)	(9,722,000)
GSWC \| Excess deferred income taxes
Regulatory matters:
Total	(73,000,000)	(74,185,000)
GSWC \| Other Regulatory Assets
Regulatory matters:
Total	11,739,000	10,670,000
Bear Valley Electric Service, Inc.
Regulatory matters:
Regulatory Asset CEMA	302,000
Bear Valley Electric Service, Inc. \| Various refunds to customers
Regulatory matters:
Total	(8,189,000)	(6,822,000)
Bear Valley Electric Service, Inc. \| Gain (Loss) on Derivative Instruments [Member]
Regulatory matters:
Total	(4,441,000)	1,537,000
Bear Valley Electric Service, Inc. \| Other Regulatory Assets
Regulatory matters:
Total	$ 13,916,000	$ 9,451,000

Regulatory Matters 2 (Details)

Regulatory Matters 2 (Details) - USD ($)	1 Months Ended		12 Months Ended
Regulatory Matters 2 (Details) - USD ($)	Oct. 31, 2005	Jul. 31, 2005	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Regulatory matters:
Water			$ 347,112,000	$ 330,637,000	$ 319,830,000
Total			(22,796,000)	16,539,000
Excess deferred income taxes
Regulatory matters:
Total			(77,000,000)
Flow-through taxes, net
Regulatory matters:
Total			(6,300,000)
WRAM
Regulatory matters:
Regulatory adjustment			7,100,000
GSWC
Regulatory matters:
Water			347,112,000	330,637,000	$ 319,830,000
Total			(24,082,000)	12,373,000
GSWC \| Excess deferred income taxes
Regulatory matters:
Total			(73,000,000)	(74,185,000)
GSWC \| Costs deferred for future recovery on Aerojet case
Regulatory matters:
Regulatory Asset Recovery Periods		20 years
Total			5,210,000	6,751,000
GSWC \| Costs deferred for future recovery on Aerojet case \| Maximum
Regulatory matters:
Regulatory Asset Recovery Periods	20 years
GSWC \| Flow-through taxes, net
Regulatory matters:
Total			$ (5,552,000)	(9,722,000)
GSWC \| WRAM, net of MCBA
Regulatory matters:
Commercial paper, term			90 days
Amount billed to customers as surcharges			$ 7,500,000
Total			$ 13,326,000	13,741,000
GSWC \| WRAM, net of MCBA \| Maximum
Regulatory matters:
Regulatory Asset Recovery Periods			24 months
GSWC \| WRAM
Regulatory matters:
Deferred Revenues			$ 0
Total			(3,800,000)
GSWC \| Modified Cost Balancing Account
Regulatory matters:
Total			17,100,000
GSWC \| Pension Costs and Other Postretirement Benefit Costs
Regulatory matters:
Total			25,212,000	65,576,000
Various refunds to customers \| GSWC
Regulatory matters:
Total			$ (2,680,000)	$ (4,577,000)

Regulatory Matters 3 (Details)

Regulatory Matters 3 (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Regulatory matters:
Under (over) collection	$ (22,796)	$ 16,539
Under (over) collection	22,796	(16,539)
Other Liabilities, Current	11,498	10,437
GSWC
Regulatory matters:
Under (over) collection	(24,082)	12,373
Under (over) collection	24,082	(12,373)
Other Liabilities, Current	10,505	9,403
Other Regulatory Assets \| GSWC
Regulatory matters:
Under (over) collection	11,739	10,670
Under (over) collection	(11,739)	(10,670)
Other Regulatory Assets \| Bear Valley Electric Service, Inc.
Regulatory matters:
Under (over) collection	13,916	9,451
Under (over) collection	(13,916)	(9,451)
Pension Costs and Other Postretirement Benefit Costs \| GSWC
Regulatory matters:
Regulatory asset authorized under settlement	25,000
Under (over) collection	25,212	65,576
Regulatory Assets	25,000
Under (over) collection	(25,212)	$ (65,576)
Under Collection in Two Way Pension Balancing Account [Member] \| Pension Costs and Other Postretirement Benefit Costs \| Bear Valley Electric Service, Inc.
Regulatory matters:
Under (over) collection	(246)
Under (over) collection	246
Under Collection in Two Way Pension Balancing Account [Member] \| Pension Costs and Other Postretirement Benefit Costs \| Golden State Water Company and Bear Valley Electric Service, Inc. [Member]
Regulatory matters:
Under (over) collection	261
Under (over) collection	$ (261)

Regulatory Matters 4 (Details)

Regulatory Matters 4 (Details) - USD ($)	1 Months Ended		12 Months Ended
Regulatory Matters 4 (Details) - USD ($)	Oct. 31, 2005	Jul. 31, 2005	Dec. 31, 2021	Feb. 02, 2022
GSWC
Regulatory matters:
Approval amount for the relief funding			$ 9,500,000
GSWC \| Costs deferred for future recovery on Aerojet case
Regulatory matters:
Increase in Revenue Requirement, Recoverable through Surcharges		$ 21,300,000
Recovery period		20 years
Reimbursement to recover costs			$ 17,500,000
GSWC \| Costs deferred for future recovery on Aerojet case \| Maximum
Regulatory matters:
Recovery period	20 years
GSWC \| Water Revenue Adjustment Mechanism Net of Modified Cost Balancing Account [Member] \| Maximum
Regulatory matters:
Recovery period			24 months
GSWC \| COVID-19 memorandum account
Regulatory matters:
Approval amount for the relief funding			$ 9,500,000
Bear Valley Electric Service, Inc.
Regulatory matters:
Regulatory Asset Wildfire Mitigation Plans WMP			2,800,000
Regulatory Asset CEMA Storm			$ 455,000
Bear Valley Electric Service, Inc. \| Renewables Portfolio Standard [Member]
Regulatory matters:
Derivative, Term of Contract			10 years
Bear Valley Electric Service, Inc. \| COVID-19 memorandum account \| Subsequent Event
Regulatory matters:
Approval amount for the relief funding				$ 321,000

Regulatory Matters 5 (Details)

Regulatory Matters 5 (Details) $ in Thousands	12 Months Ended
Regulatory Matters 5 (Details) $ in Thousands	Dec. 31, 2021USD ($)unit	Dec. 31, 2020USD ($)
Regulatory matters:
Net regulatory assets	$ (22,796)	$ 16,539
Bear Valley Electric Service, Inc.
Regulatory matters:
Number of renewable energy credits that would be purchased \| unit	578,000
Incremental vegetation management costs	$ 5,800
Regulatory Asset Wildfire Mitigation Plans WMP	2,800
Regulatory Asset CEMA Storm	$ 455
Bear Valley Electric Service, Inc. \| Renewables Portfolio Standard [Member]
Regulatory matters:
Derivative, Term of Contract	10 years
GSWC
Regulatory matters:
Net regulatory assets	$ (24,082)	12,373
Various refunds to customers \| Bear Valley Electric Service, Inc.
Regulatory matters:
Net regulatory assets	(8,189)	(6,822)
Various refunds to customers \| GSWC
Regulatory matters:
Net regulatory assets	$ (2,680)	$ (4,577)

Utility Plant and Intangible _3

Utility Plant and Intangible Assets (Details) - USD ($) $ in Thousands		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		$ 2,052,353	$ 1,930,224
Less — accumulated depreciation		(594,264)	(568,326)
Construction work in progress		167,915	150,145
Net utility plant		1,626,004	1,512,043	$ 1,415,705
American States Utility Services \| Intangible Assets [Member]
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		571	571
Water Service Utility Operations [Member]
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		1,935,881	1,817,717
Water Service Utility Operations [Member] \| Land
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		18,207	18,234
Water Service Utility Operations [Member] \| Intangible Assets [Member]
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		29,028	28,906
Water Service Utility Operations [Member] \| Source of water supply
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		98,244	92,166
Water Service Utility Operations [Member] \| Pumping
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		209,936	190,901
Water Service Utility Operations [Member] \| Water treatment
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		83,922	81,272
Water Service Utility Operations [Member] \| Transmission and distribution
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		1,356,649	1,277,361
Water Service Utility Operations [Member] \| General
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		139,895	128,877
Electric:
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		116,472	112,507
Electric: \| Intangible Assets [Member]
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		1,200	1,200
Electric: \| Transmission and distribution
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		90,491	87,461
Electric: \| Generation
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		12,583	12,583
Electric: \| General
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost	[1]	13,398	12,463
GSWC
Utility plant utilized in continuing operations by major asset class
Less — accumulated depreciation		(522,672)	(502,283)
Construction work in progress		123,600	118,370
Net utility plant		1,499,745	1,400,489
GSWC \| Water Service Utility Operations [Member]
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		1,898,817	1,784,402
Net utility plant		1,499,745	1,400,489	1,322,062
GSWC \| Water Service Utility Operations [Member] \| Land
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		18,207	18,234
GSWC \| Water Service Utility Operations [Member] \| Intangible Assets [Member]
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		29,028	28,906
GSWC \| Water Service Utility Operations [Member] \| Source of water supply
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		98,244	92,166
GSWC \| Water Service Utility Operations [Member] \| Pumping
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		209,936	190,901
GSWC \| Water Service Utility Operations [Member] \| Water treatment
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		83,922	81,272
GSWC \| Water Service Utility Operations [Member] \| Transmission and distribution
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		1,356,649	1,277,361
GSWC \| Water Service Utility Operations [Member] \| General
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		102,831	95,562
GSWC \| Electric:
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		0	0
Net utility plant			89,308	$ 72,680
GSWC \| Electric: \| Transmission and distribution
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		0	0
GSWC \| Electric: \| Generation
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost		0	0
GSWC \| Electric: \| General
Utility plant utilized in continuing operations by major asset class
Total utility plant, at cost	[1]	$ 0	$ 0

[1]	Includes intangible assets of $1.2 million for the years ended December 31, 2021 and 2020 for studies performed in association with the electric segment.

Utility Plant and Intangible _4

Utility Plant and Intangible Assets 2 (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Intangible assets
Total amortized intangible assets		$ 30,439	$ 30,321
Less - accumulated amortization		(26,401)	(24,460)
Intangible assets, net of amortization		4,038	5,861
Unamortized intangible assets	[1]	400	399
Amortization of intangible assets		700	$ 654	$ 1,300
Estimated future consolidated amortization expenses related to intangible assets
2022		672
2023		672
2024		672
2025		672
2026		672
Total		$ 3,360
Conservation [Member]
Intangible assets
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		3 years	3 years
Total amortized intangible assets		$ 9,486	$ 9,486
Water and water service rights
Intangible assets
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		30 years	30 years
Total amortized intangible assets	[2]	$ 8,695	$ 8,694
Water planning studies
Intangible assets
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		14 years	14 years
Total amortized intangible assets		$ 12,258	$ 12,141
GSWC
Intangible assets
Total amortized intangible assets		28,629	28,508
Less - accumulated amortization		(25,109)	(24,305)
Intangible assets, net of amortization		3,520	4,203
Unamortized intangible assets	[1]	$ 399	$ 399
GSWC \| Conservation [Member]
Intangible assets
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		3 years	3 years
Total amortized intangible assets		$ 9,486	$ 9,486
GSWC \| Water and water service rights
Intangible assets
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		30 years	30 years
Total amortized intangible assets	[2]	$ 8,124	$ 8,124
GSWC \| Water planning studies
Intangible assets
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		14 years	14 years
Total amortized intangible assets		$ 11,019	$ 10,898

[1]	The intangible assets not subject to amortization primarily consist of organization and consent fees.
[2]	Includes intangible assets of $571,000 for contracted services included in "Other Property and Investments" on the consolidated balance sheets as of December 31, 2021 and 2020.

Utility Plant and Intangible _5

Utility Plant and Intangible Assets 3 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of the beginning and ending aggregate carrying amount of the asset retirement obligations
Obligation at the beginning of the period	$ 9,320	$ 8,863
Additional liabilities incurred	148	165
Liabilities settled	(120)	(58)
Accretion	369	350
Obligation at the end of the period	$ 9,717	$ 9,320

Derivative Instruments (Details

Derivative Instruments (Details) - Bear Valley Electric Service, Inc. $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)MWh	Dec. 31, 2020USD ($)
Derivative instruments
Derivative Activity Volume \| MWh	350,000
Changes in the fair value of the derivative
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	$ 4,400
Purchase power contract
Changes in the fair value of the derivative
Balance, at beginning of the period	1,537	$ 3,171
Unrealized gain on purchased power contracts	5,978	1,634
Balance, at end of the period	$ 4,441	$ 1,537
Minimum
Derivative instruments
Derivative, Term of Contract	3 years
Minimum \| Purchase power contract
Derivative instruments
Derivative, Term of Contract	3 years
Maximum
Derivative instruments
Derivative, Term of Contract	5 years
Maximum \| Purchase power contract
Derivative instruments
Derivative, Term of Contract	5 years

Military Privatization (Details

Military Privatization (Details) $ in Thousands	12 Months Ended
Military Privatization (Details) $ in Thousands	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Receivables from the U.S. government:
Less: allowance for doubtful accounts	$ (3,569)	$ (5,316)	$ (916)	$ (951)
Pretax income
Increase in pretax operating income	$ 140,977	130,499	127,073
Contracted services:
Military Privatization
Period of fixed price contracts to maintain water systems at various military bases	50 years
Number of Operating Segments	8
American States Utility Services \| Contracted services:
Pretax income
Increase in pretax operating income	$ 22,675	$ 22,309	$ 21,990

Earnings Per Share and Capita_3

Earnings Per Share and Capital Stock (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Basic
Net Income		$ 94,347	$ 86,425	$ 84,342
Less: Distributed earnings to common shareholders		51,689	47,206	42,702
Less: Distributed earnings to participating securities		134	158	180
Undistributed earnings		42,524	39,061	41,460
Undistributed earnings allocated to common shareholders		42,414	38,930	41,285
Undistributed earnings allocated to participating securities			131	175
Total income available to common shareholders, basic		$ 94,103	$ 86,136	$ 83,987
Weighted average Common Shares outstanding, basic		36,921,000	36,880,000	36,814,000
Basic earnings per Common Share:
Earnings Per Share, Basic		$ 2.55	$ 2.34	$ 2.28
Diluted
Total income available to common shareholders, basic		$ 94,103	$ 86,136	$ 83,987
Undistributed earnings for dilutive stock options		110	131	175
Total common shareholders earnings, diluted		$ 94,213	$ 86,267	$ 84,162
Weighted average Common Shares outstanding, basic		36,921,000	36,880,000	36,814,000
Stock-based compensation (in shares)	[1]	89,000	115,000	150,000
Weighted average common shares outstanding, diluted		37,010,000	36,995,000	36,964,000
Diluted earnings per Common Share:
Earnings Per Share, Diluted		$ 2.55	$ 2.33	$ 2.28
Restricted Stock Units
Share based compensation arrangement
Restricted stock units outstanding (in shares)		100,020

[1]	(1) In applying the treasury stock method of reflecting the dilutive effect of outstanding stock-based compensation in the calculation of diluted EPS, 100,020 restricted stock units, including performance awards, at December 31, 2021 were deemed to be outstanding in accordance with accounting guidance on earnings per share.

Earnings Per Share and Capita_4

Earnings Per Share and Capital Stock 2 (Details) - USD ($)	12 Months Ended
Earnings Per Share and Capital Stock 2 (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Capital stock
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic		$ (131,000)	$ (175,000)
Additional disclosure
Proceeds from Stock Options Exercised, Distributed to Subsidiaries	$ 0	$ 0	$ 0
Dividend Reinvestment Plan Common Stock Capital Shares Reserved for Future Issuance	1,055,948
Common Shares authorized for issuance but unissued under 401(k) Plan	387,300
Common Shares issued as a result of the exercise of stock options	0	1,800	30,998
Cash proceeds from the exercise of stock options		$ 30,000	$ 519,000
Exercise of stock options and other issuance of Common Shares	$ 0	$ 30,000	$ 519,000
2000 and 2008 Employee Plans
Additional disclosure
Exercise of stock options and other issuance of Common Shares	47,182	42,489	88,772
AWR
Additional disclosure
Cash proceeds from the exercise of stock options	$ 0	$ 30,000	$ 519,000
GSWC
Additional disclosure
Short-term Debt, Terms	24
Exercise of stock options and other issuance of Common Shares	$ 60,000,000	$ 60,000,000
Common Stock [Member]
Additional disclosure
Exercise of stock options and other issuance of Common Shares	47,000	42,000	89,000
Exercise of stock options and other issuance of Common Shares	$ 0	$ 30,000	$ 519,000
Common Stock [Member] \| GSWC
Additional disclosure
Exercise of stock options and other issuance of Common Shares	0	5
Exercise of stock options and other issuance of Common Shares	$ 60,000,000

Dividend Limitations (Details)

Dividend Limitations (Details) $ in Thousands	12 Months Ended
Dividend Limitations (Details) $ in Thousands	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Dividend limitations
Common shareholder’s equity	$ 685,947	$ 641,673	$ 601,530	$ 558,223
Reinvested earnings in the business	427,505	385,007
AWR
Dividend limitations
Common shareholder’s equity	685,947	641,673
Subsidiaries
Dividend limitations
Dividends paid	38,300	47,300	42,700
GSWC
Dividend limitations
Dividends paid	38,300	22,500	20,200
Common shareholder’s equity	$ 615,686	583,298	551,188	503,575
Ratio of Indebtedness to Net Capital	0.4288
Reinvested earnings in the business	$ 259,156	228,392
GSWC \| Maximum
Dividend limitations
Ratio of Indebtedness to Net Capital	0.6667
Earnings Reinvested in the Business
Dividend limitations
Common shareholder’s equity	$ 427,505	385,007	345,964	304,534
Earnings Reinvested in the Business \| GSWC
Dividend limitations
Common shareholder’s equity	$ 259,156	$ 228,392	$ 257,434	$ 211,163

Bank Debt (Details)

Bank Debt (Details)	12 Months Ended
Bank Debt (Details)	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Jul. 01, 2020USD ($)
Bank debt
Line of credit facility, current borrowing capacity	$ 200,000,000
Bear Valley Electric Service, Inc.
Bank debt
Maximum borrowing capacity	35,000,000
Incremental expansion of borrowing capacity	15,000,000		$ 35,000,000
Notes Payable	$ 31,000,000
GSWC
Bank debt
Short-term Debt, Terms	24
Long-term Debt [Member]
Bank debt
Balance Outstanding at December 31,	$ 205,500,000	$ 134,200,000
Short-term borrowing activities (excluding letters of credit)
Balance Outstanding at December 31,	205,500,000	134,200,000
Short-term borrowing (excluding letters of credit)
Bank debt
Average Amount Outstanding	$ 165,167,000	$ 162,995,000
Weighted Average Annual Interest Rate (as a percent)	1.05%	1.47%
Maximum Amount Outstanding	$ 205,500,000	$ 249,200,000
Short-term borrowing activities (excluding letters of credit)
Weighted Average Annual Interest Rate (as a percent)	1.05%	1.47%
Average Amount Outstanding	$ 165,167,000	$ 162,995,000
Maximum Amount Outstanding	205,500,000	249,200,000
Average amount outstanding	$ 165,167,000	$ 162,995,000
Short-term borrowing (excluding letters of credit) \| Maximum
Bank debt
Interest Rate at the end of the period (as a percent)	1.61%	1.90%
Short-term borrowing activities (excluding letters of credit)
Interest Rate at the end of the period (as a percent)	1.61%	1.90%
Short-term borrowing (excluding letters of credit) \| Minimum
Bank debt
Interest Rate at the end of the period (as a percent)	0.78%	1.19%
Short-term borrowing activities (excluding letters of credit)
Interest Rate at the end of the period (as a percent)	0.78%	1.19%
Syndicated revolving credit facility
Bank debt
Variable rate basis	LIBOR
Syndicated revolving credit facility \| Bear Valley Electric Service, Inc.
Bank debt
Interest coverage ratio	58.6
Total funded debt ratio	0.30
Short-term borrowing activities (excluding letters of credit)
Interest coverage ratio	58.6
Total funded debt ratio	0.30
Syndicated revolving credit facility \| Maximum
Bank debt
Total funded debt ratio	0.65
Short-term borrowing activities (excluding letters of credit)
Total funded debt ratio	0.65
Syndicated revolving credit facility \| Minimum
Bank debt
Interest coverage ratio	3.25
Short-term borrowing activities (excluding letters of credit)
Interest coverage ratio	3.25
Syndicated revolving credit facility \| Minimum \| Bear Valley Electric Service, Inc.
Bank debt
Interest coverage ratio	4.5
Short-term borrowing activities (excluding letters of credit)
Interest coverage ratio	4.5
AWR
Bank debt
Line of credit facility, current borrowing capacity	$ 200,000,000
AWR \| Long-term Debt [Member]
Bank debt
Balance Outstanding at December 31,	174,500,000	$ 114,000,000
Short-term borrowing activities (excluding letters of credit)
Balance Outstanding at December 31,	$ 174,500,000	$ 114,000,000
AWR \| Short-term borrowing (excluding letters of credit)
Bank debt
Interest Rate at the end of the period (as a percent)	0.78%	1.19%
Average Amount Outstanding	$ 139,926,000	$ 160,495,000
Weighted Average Annual Interest Rate (as a percent)	0.91%	1.47%
Maximum Amount Outstanding	$ 174,500,000	$ 249,000,000
Short-term borrowing activities (excluding letters of credit)
Weighted Average Annual Interest Rate (as a percent)	0.91%	1.47%
Average Amount Outstanding	$ 139,926,000	$ 160,495,000
Maximum Amount Outstanding	$ 174,500,000	$ 249,000,000
Interest Rate at the end of the period (as a percent)	0.78%	1.19%
Average amount outstanding	$ 139,926,000	$ 160,495,000
AWR \| Syndicated revolving credit facility
Bank debt
Interest coverage ratio	8.21
Total funded debt ratio	0.47
Short-term borrowing activities (excluding letters of credit)
Interest coverage ratio	8.21
Total funded debt ratio	0.47
AWR \| Syndicated revolving credit facility \| Bear Valley Electric Service, Inc.
Bank debt
Total funded debt ratio	0.65
Short-term borrowing activities (excluding letters of credit)
Total funded debt ratio	0.65
AWR \| Syndicated revolving credit facility \| Maximum
Bank debt
Total funded debt ratio	1
Short-term borrowing activities (excluding letters of credit)
Total funded debt ratio	1
AWR \| Syndicated revolving credit facility \| Minimum
Bank debt
Interest coverage ratio	3.25
Total funded debt ratio	0.65
Short-term borrowing activities (excluding letters of credit)
Interest coverage ratio	3.25
Total funded debt ratio	0.65
AWR \| Syndicated revolving credit facility \| Letters of credit
Bank debt
Maximum borrowing capacity	$ 25,000,000
Letter of credit, amount	$ 455,000
Letter of credit fee (as a percent)	0.65%

Long-Term Debt (Details)

Long-Term Debt (Details) - USD ($)	May 24, 2021	Dec. 31, 2021	Dec. 31, 2020	Jul. 08, 2020	Dec. 31, 2013
GSWC
Debt Instrument [Line Items]
Ratio of Indebtedness to Net Capital		0.4288
Ratio of Indebtedness to EBITDA		3.2
GSWC \| Maximum
Debt Instrument [Line Items]
Ratio of Indebtedness to Net Capital		0.6667
Ratio of Indebtedness to EBITDA		8
9.56% notes due 2031
Debt Instrument [Line Items]
Interest rate (as a percent)		9.56%	9.56%
9.56% notes due 2031 \| GSWC
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 28,000,000
Interest rate (as a percent)		9.56%	9.56%
Debt Instrument, Redemption Price, Percentage	3.00%
Redemption Price Of Debt Instrument	$ 840,000
5.87% notes due 2028
Debt Instrument [Line Items]
Interest rate (as a percent)		5.87%	5.87%
5.87% notes due 2028 \| GSWC
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 40,000,000
Interest rate (as a percent)		5.87%	5.87%
American Recovery and Reinvestment Act Obligation due 2033 \| GSWC
Debt Instrument [Line Items]
Interest rate (as a percent)					2.50%
3.45% notes due 2029
Debt Instrument [Line Items]
Interest rate (as a percent)		3.45%	3.45%
3.45% notes due 2029 \| GSWC
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 15,000,000
Interest rate (as a percent)		3.45%	3.45%
Private Placement Notes [Member] \| GSWC
Debt Instrument [Line Items]
Debt Instrument, Face Amount				$ 160,000,000
Debt Instrument Redemption Premium above Treasury Yield		50.00%
2.17% notes due 2030
Debt Instrument [Line Items]
Interest rate (as a percent)		2.17%	2.17%
2.17% notes due 2030 \| GSWC
Debt Instrument [Line Items]
Debt Instrument, Face Amount				$ 85,000,000
Interest rate (as a percent)		2.17%	2.17%	2.17%
2.90% notes due 2040
Debt Instrument [Line Items]
Interest rate (as a percent)		2.90%	2.90%
2.90% notes due 2040 \| GSWC
Debt Instrument [Line Items]
Debt Instrument, Face Amount				$ 75,000,000
Interest rate (as a percent)		2.90%	2.90%	2.90%

Long-Term Debt 2 (Details)

Long-Term Debt 2 (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Annual maturities of all long-term debt, including capitalized leases
Total	$ 415,788	$ 444,271
GSWC
Annual maturities of all long-term debt, including capitalized leases
2022	377
2023	400
2024	421
2025	441
2026	460
Thereafter	413,689
Total	$ 415,788	$ 444,271

Long-Term Debt 3 (Details)

Long-Term Debt 3 (Details) - USD ($)	3 Months Ended	12 Months Ended
Long-Term Debt 3 (Details) - USD ($)	Dec. 31, 2010	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2014	Dec. 31, 2013	Oct. 31, 2009
Debt Instrument [Line Items]
Loan proceeds received for reimbursement of costs of conversion		$ 0	$ 159,413,000	$ 0
3.45% notes due 2029
Debt Instrument [Line Items]
Interest rate (as a percent)		3.45%	3.45%
9.56% notes due 2031
Debt Instrument [Line Items]
Interest rate (as a percent)		9.56%	9.56%
GSWC
Debt Instrument [Line Items]
Ratio of Indebtedness to EBITDA		3.2
Loan proceeds received for reimbursement of costs of conversion		$ 0	$ 159,413,000	$ 0
GSWC \| Maximum
Debt Instrument [Line Items]
Ratio of Indebtedness to EBITDA		8
GSWC \| 3.45% notes due 2029
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 15,000,000
Interest rate (as a percent)		3.45%	3.45%
GSWC \| American Recovery and Reinvestment Act Obligation due 2033
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 9,000,000
Interest rate (as a percent)						2.50%
Maturity term					20 years
Loan proceeds received for reimbursement of costs of conversion	$ 8,600,000
GSWC \| 9.56% notes due 2031
Debt Instrument [Line Items]
Debt Instrument, Face Amount		$ 28,000,000
Interest rate (as a percent)		9.56%	9.56%

Taxes on Income (Details)

Taxes on Income (Details) - USD ($)	12 Months Ended
Taxes on Income (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Taxes on income
Unrecognized Tax Benefits	$ 0	$ 0	$ 0
Deferred tax assets:
Regulatory-liability-related	32,220,000	32,640,000
Contributions and advances	6,850,000	6,390,000
Deferred Tax Assets, Other	5,324,000	6,092,000
Deferred tax assets	44,394,000	45,122,000
Deferred tax liabilities:
Fixed assets	(150,290,000)	(146,688,000)
Regulatory-asset-related: depreciation and other	(25,914,000)	(22,205,000)
Balancing and memorandum accounts (non-flow-through)	(8,480,000)	(7,401,000)
Deferred tax liabilities	(184,684,000)	(176,294,000)
Accumulated deferred income taxes - net	(140,290,000)	(131,172,000)
Current
Federal	19,592,000	19,240,000	12,507,000
State	7,270,000	6,714,000	5,540,000
Total current tax expense	26,862,000	25,954,000	18,047,000
Deferred
Federal	2,802,000	1,814,000	6,407,000
State	759,000	429,000	216,000
Total deferred tax (benefit) expense	3,561,000	2,243,000	6,623,000
Reconciliations of the effective tax rates to the federal statutory rate
Federal taxes on pretax income at statutory rate (21% in 2018; 35% in 2017 and 2016)	26,202,000	24,071,000	22,872,000
Increase (decrease) in taxes resulting from:	6,425,000	5,764,000	4,758,000
Excess deferred tax amortization	(1,356,000)	(1,550,000)	(1,579,000)
Flow-through on fixed assets	1,069,000	1,056,000	1,244,000
Flow-through on removal costs	(1,962,000)	(1,031,000)	(1,582,000)
Investment tax credit	(71,000)	(71,000)	(71,000)
Other- net	116,000	(42,000)	(972,000)
Total income tax expense operations	30,423,000	28,197,000	24,670,000
Income before income tax expense	$ 124,770,000	$ 114,622,000	$ 109,012,000
Effective income tax rate (as a percent)	24.40%	24.60%	22.60%
GSWC
Deferred tax assets:
Regulatory-liability-related	$ 30,410,000	$ 30,782,000
Contributions and advances	7,227,000	6,771,000
Deferred Tax Assets, Other	5,689,000	6,663,000
Deferred tax assets	43,326,000	44,216,000
Deferred tax liabilities:
Fixed assets	(144,719,000)	(141,422,000)
Regulatory-asset-related: depreciation and other	(24,858,000)	(21,060,000)
Balancing and memorandum accounts (non-flow-through)	(6,063,000)	(6,315,000)
Deferred tax liabilities	(175,640,000)	(168,797,000)
Accumulated deferred income taxes - net	(132,314,000)	(124,581,000)
Current
Federal	13,698,000	14,674,000	$ 9,616,000
State	6,089,000	5,849,000	5,480,000
Total current tax expense	19,787,000	20,523,000	15,096,000
Deferred
Federal	2,251,000	949,000	4,924,000
State	57,000	232,000	157,000
Total deferred tax (benefit) expense	2,308,000	1,181,000	5,081,000
Reconciliations of the effective tax rates to the federal statutory rate
Federal taxes on pretax income at statutory rate (21% in 2018; 35% in 2017 and 2016)	19,175,000	18,202,000	18,236,000
Increase (decrease) in taxes resulting from:	4,923,000	4,920,000	4,656,000
Excess deferred tax amortization	(1,184,000)	(1,477,000)	(1,579,000)
Flow-through on fixed assets	1,008,000	1,042,000	1,244,000
Flow-through on removal costs	(1,954,000)	(1,026,000)	(1,582,000)
Investment tax credit	(71,000)	(71,000)	(71,000)
Other- net	198,000	114,000	(727,000)
Total income tax expense operations	22,095,000	21,704,000	20,177,000
Income before income tax expense	91,310,000	86,675,000	86,840,000
Pretax income from operations	$ 91,310,000	$ 86,675,000	$ 86,840,000
Effective income tax rate (as a percent)	24.20%	25.00%	23.20%

Employee Benefit Plans 1 (Detai

Employee Benefit Plans 1 (Details) - Pension Benefits	12 Months Ended
Employee Benefit Plans 1 (Details) - Pension Benefits	Dec. 31, 2021participantitem	Dec. 31, 2020
Employee benefit plans
Minimum age for eligibility under the Pension Plan \| item	21
Minimum period of service for eligibility under the Pension Plan	5 years
Normal retirement benefit (as a percent)	2.00%
Defined benefit plan number of highest consecutive years average earnings used in computing retirement benefit	5 years
Maximum number of years of credited service considered in determining retirement benefit	40 years
Number of participants in the Pension Plan \| participant	918
Eligibility for employer matching contributions, period of service	3 years
Discount rate	2.89%	2.55%
Minimum
Employee benefit plans
Percentage of participant's eligible pay contributed to the plan by the employer	3.00%
Maximum
Employee benefit plans
Percentage of participant's eligible pay contributed to the plan by the employer	5.25%

Employee Benefit Plans 2 (Detai

Employee Benefit Plans 2 (Details) - USD ($) $ in Thousands	12 Months Ended
Employee Benefit Plans 2 (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Change in Projected Benefit Obligation:
Projected benefit obligation at beginning of year	$ 272,786	$ 231,852
Service cost	6,316	5,558	$ 4,441
Interest cost	6,833	7,880	8,527
Actuarial (gain) loss	(17,682)	35,453
Benefits/expenses paid	(8,502)	(7,957)
Projected benefit obligation at end of year	259,751	272,786	231,852
Changes in Plan Assets:
Fair value of plan assets at beginning of year	213,147	192,477
Actual return on plan assets	25,390	24,909
Employer contributions	3,489	3,718
Benefits/expenses paid	(8,502)	(7,957)
Fair value of plan assets at end of year	233,524	213,147	192,477
Funded Status:
Net amount recognized as accrued pension cost	(26,227)	(59,639)
Post-Retirement Medical Benefits
Change in Projected Benefit Obligation:
Projected benefit obligation at beginning of year	5,906	7,395
Service cost	149	171	186
Interest cost	110	208	285
Actuarial (gain) loss	(3,165)	(1,604)
Benefits/expenses paid	(314)	(264)
Projected benefit obligation at end of year	2,686	5,906	7,395
Changes in Plan Assets:
Fair value of plan assets at beginning of year	12,313	11,271
Actual return on plan assets	1,773	1,307
Employer contributions	242	269
Benefits/expenses paid	(555)	(534)
Fair value of plan assets at end of year	13,773	12,313	$ 11,271
Funded Status:
Net amount recognized as accrued pension cost	$ 11,087	$ 6,407

Employee Benefit Plans 3 (Detai

Employee Benefit Plans 3 (Details) - USD ($) $ in Thousands	12 Months Ended
Employee Benefit Plans 3 (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Amounts recognized on the balance sheets:
Non-current liabilities	$ (61,365)	$ (95,639)
Pension Benefits
Amounts recognized on the balance sheets:
Non-current assets	0	0
Current liabilities	0	0
Non-current liabilities	(26,227)	(59,639)
Net amount recognized	(26,227)	(59,639)
Amounts recognized in regulatory assets consist of:
Prior service cost (credit)	2,323	2,757
Net (gain) loss	23,368	57,716
Regulatory assets (liabilities)	25,691	60,473	$ 40,500
Unfunded accrued pension cost	536	(834)
Net liability (asset) recognized	26,227	59,639
Changes in plan assets and benefit obligations recognized in regulatory assets:
Regulatory asset at beginning of year	60,473	40,500
Net loss (gain)	(30,531)	22,343
New prior service cost	0	0
Amortization of prior service (cost) credit	(434)	(435)
Amortization of net gain (loss)	(3,817)	(1,935)
Total change in regulatory asset	(34,782)	19,973
Regulatory asset (liability) at end of year	25,691	60,473	40,500
Net periodic pension costs	4,859	4,010	$ 4,447
Change in regulatory asset	(34,782)	19,973
Total recognized in net periodic pension cost and regulatory asset (liability)	(29,923)	23,983
Additional year-end information for plans with an accumulated benefit obligation in excess of plan assets:
Projected benefit obligation	259,751	272,786
Accumulated benefit obligation	243,412	253,108
Fair value of plan assets	$ 233,524	$ 213,147
Weighted-average assumptions used to determine benefit obligations at December 31:
Discount rate	2.89%	2.55%
Pension Benefits \| Minimum
Weighted-average assumptions used to determine benefit obligations at December 31:
Rate of compensation increase	3.00%	3.00%	3.00%
Pension Benefits \| Maximum
Weighted-average assumptions used to determine benefit obligations at December 31:
Rate of compensation increase	8.00%	8.00%	8.00%
Post-Retirement Medical Benefits
Amounts recognized on the balance sheets:
Non-current assets	$ 11,087	$ 6,407
Current liabilities	0	0
Non-current liabilities	0	0
Net amount recognized	11,087	6,407
Amounts recognized in regulatory assets consist of:
Prior service cost (credit)	0	0
Net (gain) loss	(9,839)	(6,855)
Regulatory assets (liabilities)	(9,839)	(6,855)	$ (5,432)
Unfunded accrued pension cost	(1,248)	448
Net liability (asset) recognized	(11,087)	(6,407)
Changes in plan assets and benefit obligations recognized in regulatory assets:
Regulatory asset at beginning of year	(6,855)	(5,432)
Net loss (gain)	(4,401)	(2,400)
New prior service cost	0	0
Amortization of prior service (cost) credit	0	0
Amortization of net gain (loss)	1,417	977
Total change in regulatory asset	(2,984)	(1,423)
Regulatory asset (liability) at end of year	(9,839)	(6,855)	(5,432)
Net periodic pension costs	(1,695)	(1,108)	$ (779)
Change in regulatory asset	(2,984)	(1,423)
Total recognized in net periodic pension cost and regulatory asset (liability)	(4,679)	(2,531)
Additional year-end information for plans with an accumulated benefit obligation in excess of plan assets:
Projected benefit obligation	2,686	5,906
Fair value of plan assets	$ 13,773	$ 12,313
Weighted-average assumptions used to determine benefit obligations at December 31:
Discount rate	2.46%	2.20%

Employee Benefit Plans 4 (Detai

Employee Benefit Plans 4 (Details) - USD ($) $ in Thousands	12 Months Ended
Employee Benefit Plans 4 (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Union plan
Weighted-average assumptions used to determine net periodic cost:
Expected long-term return on plan assets	5.75%	6.00%	6.00%
Non-union plan
Weighted-average assumptions used to determine net periodic cost:
Expected long-term return on plan assets	4.00%	4.20%	4.20%
Pension Benefits
Components of Net Periodic Benefits Cost:
Service cost	$ 6,316	$ 5,558	$ 4,441
Interest cost	6,833	7,880	8,527
Expected return on plan assets	(12,541)	(11,798)	(10,374)
Amortization of prior service cost (credit)	434	435	434
Amortization of actuarial (gain) loss	3,817	1,935	1,419
Net periodic pension cost under accounting standards	4,859	4,010	4,447
Regulatory adjustment	(1,277)	(483)	(593)
Total expense recognized, before surcharges and allocation to overhead pool	$ 3,582	$ 3,527	$ 3,854
Weighted-average assumptions used to determine net periodic cost:
Discount rate	2.55%	3.43%	4.43%
Expected long-term return on plan assets	6.00%	6.25%	6.50%
Pension Benefits \| Minimum
Weighted-average assumptions used to determine net periodic cost:
Rate of compensation increase	3.00%	3.00%	3.00%
Pension Benefits \| Maximum
Weighted-average assumptions used to determine net periodic cost:
Rate of compensation increase	8.00%	8.00%	8.00%
Post-Retirement Medical Benefits
Components of Net Periodic Benefits Cost:
Service cost	$ 149	$ 171	$ 186
Interest cost	110	208	285
Expected return on plan assets	(537)	(510)	(449)
Amortization of prior service cost (credit)	0	0	0
Amortization of actuarial (gain) loss	(1,417)	(977)	(801)
Net periodic pension cost under accounting standards	(1,695)	(1,108)	(779)
Regulatory adjustment	0	0	0
Total expense recognized, before surcharges and allocation to overhead pool	$ (1,695)	$ (1,108)	$ (779)
Weighted-average assumptions used to determine net periodic cost:
Discount rate	2.20%	3.12%	4.20%

Employee Benefit Plans 5 (Detai

Employee Benefit Plans 5 (Details) - Pension Benefits - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Employee benefit plans
Regulatory adjustment	$ (1,277)	$ (483)	$ (593)
GSWC
Employee benefit plans
Regulatory adjustment	(1,300)	483	593
Bear Valley Electric Service, Inc.
Employee benefit plans
Regulatory adjustment	$ (246)	$ (200)	$ (205)

Employee Benefit Plans 6 (Detai

Employee Benefit Plans 6 (Details)	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Employee benefit plans
Actual Asset Allocations:	100.00%	100.00%
Target Asset Allocations:	100.00%	100.00%
Pension Benefits \| Equity securities
Employee benefit plans
Actual Asset Allocations:	56.00%	59.00%
Target Asset Allocations:	60.00%	60.00%
Pension Benefits \| Debt securities
Employee benefit plans
Actual Asset Allocations:	38.00%	36.00%
Target Asset Allocations:	40.00%	40.00%
Pension Benefits \| Real Estate Funds
Employee benefit plans
Actual Asset Allocations:	6.00%	5.00%
Pension Benefits \| Cash equivalents
Employee benefit plans
Actual Asset Allocations:	0.00%	0.00%
Post-Retirement Medical Benefits
Employee benefit plans
Actual Asset Allocations:	100.00%	100.00%
Target Asset Allocations:	100.00%	100.00%
Post-Retirement Medical Benefits \| Equity securities
Employee benefit plans
Actual Asset Allocations:	60.00%	63.00%
Target Asset Allocations:	60.00%	60.00%
Post-Retirement Medical Benefits \| Debt securities
Employee benefit plans
Actual Asset Allocations:	39.00%	36.00%
Target Asset Allocations:	40.00%	40.00%
Post-Retirement Medical Benefits \| Real Estate Funds
Employee benefit plans
Actual Asset Allocations:	0.00%	0.00%
Post-Retirement Medical Benefits \| Cash equivalents
Employee benefit plans
Actual Asset Allocations:	1.00%	1.00%

Employee Benefit Plans 7 (Detai

Employee Benefit Plans 7 (Details) - Pension Benefits - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Employee benefit plans
Fair Value	$ 233,524	$ 213,147	$ 192,477
Unfunded Commitments	0	0
Cash equivalents
Employee benefit plans
Fair Value	637	589
Unfunded Commitments	0	0
Fixed income fund
Employee benefit plans
Fair Value	87,760	76,221
Unfunded Commitments	0	0
Total equity funds
Employee benefit plans
Fair Value	131,555	126,002
Unfunded Commitments	0
U.S. small/mid cap funds
Employee benefit plans
Fair Value	58,451	21,837
Unfunded Commitments	0	0
U.S. large cap funds
Employee benefit plans
Fair Value	22,143	53,677
Unfunded Commitments	0	0
International funds
Employee benefit plans
Fair Value	50,961	50,488
Unfunded Commitments	0	0
Real estate funds
Employee benefit plans
Fair Value	13,572	10,335
Unfunded Commitments	$ 0	$ 0

Employee Benefit Plans 8 (Detai

Employee Benefit Plans 8 (Details) - USD ($) $ in Thousands	12 Months Ended
Employee Benefit Plans 8 (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Post-Retirement Medical Benefits
Employee benefit plans
Employer contributions	$ 242	$ 269
Pension Benefits
Employee benefit plans
Employer contributions	3,489	$ 3,718
Expected future employer's contribution	$ 3,100
Minimum \| Fixed income fund \| Post-Retirement Medical Benefits
Employee benefit plans
Maturity period of investments	1 year
Maximum \| Fixed income fund \| Post-Retirement Medical Benefits
Employee benefit plans
Maturity period of investments	20 years

Employee Benefit Plans 9 (Detai

Employee Benefit Plans 9 (Details) - Post-Retirement Medical Benefits - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Employee benefit plans
Fair value of post-retirement plan assets	$ 13,773	$ 12,313	$ 11,271
Fair Value
Employee benefit plans
Fair value of post-retirement plan assets	13,773	12,312
Level 1
Employee benefit plans
Fair value of post-retirement plan assets	13,773	12,312
Level 2
Employee benefit plans
Fair value of post-retirement plan assets	0	0
Level 3
Employee benefit plans
Fair value of post-retirement plan assets	0	0
Cash equivalents \| Fair Value
Employee benefit plans
Fair value of post-retirement plan assets	92	169
Cash equivalents \| Level 1
Employee benefit plans
Fair value of post-retirement plan assets	92	169
Cash equivalents \| Level 2
Employee benefit plans
Fair value of post-retirement plan assets	0	0
Cash equivalents \| Level 3
Employee benefit plans
Fair value of post-retirement plan assets	0	0
Fixed income fund \| Fair Value
Employee benefit plans
Fair value of post-retirement plan assets	5,409	4,436
Fixed income fund \| Level 1
Employee benefit plans
Fair value of post-retirement plan assets	5,409	4,436
Fixed income fund \| Level 2
Employee benefit plans
Fair value of post-retirement plan assets	0	0
Fixed income fund \| Level 3
Employee benefit plans
Fair value of post-retirement plan assets	0	0
U.S. equity securities \| Fair Value
Employee benefit plans
Fair value of post-retirement plan assets	8,272	7,707
U.S. equity securities \| Level 1
Employee benefit plans
Fair value of post-retirement plan assets	8,272	$ 7,707
U.S. equity securities \| Level 2
Employee benefit plans
Fair value of post-retirement plan assets	0
U.S. equity securities \| Level 3
Employee benefit plans
Fair value of post-retirement plan assets	$ 0

Employee Benefit Plans 10 (Deta

Employee Benefit Plans 10 (Details) $ in Thousands	Dec. 31, 2021USD ($)
Pension Benefits
Employee benefit plans
2022	$ 8,983
2023	9,598
2024	10,347
2025	10,844
2026	11,280
Thereafter	64,368
Total	115,420
Post-Retirement Medical Benefits
Employee benefit plans
2022	327
2023	314
2024	292
2025	285
2026	260
Thereafter	869
Total	$ 2,347

Employee Benefit Plans 11 (Deta

Employee Benefit Plans 11 (Details) - USD ($) $ in Millions	12 Months Ended
Employee Benefit Plans 11 (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Healthcare Cost Trend Rate
Initial health care cost for employees under age of 65 (as a percent)	5.20%
Ultimate health care cost for employees under age of 65 (as a percent)	4.30%
Initial Health care cost for employees of age 65 and over (as a percent)	5.20%
Ultimate health care cost for employees of age 65 and over (as a percent)	4.30%
SERP
Healthcare Cost Trend Rate
Balance in Rabbi Trust	$ 31.5
Union plan
Employee benefit plans
Expected long-term return on plan assets	5.75%	6.00%	6.00%
Non-union plan
Employee benefit plans
Expected long-term return on plan assets	4.00%	4.20%	4.20%

Employee Benefit Plans 12 (Deta

Employee Benefit Plans 12 (Details) - SERP - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Employee benefit plans
Fair value of assets held in Rabbi Trust	$ 0	$ 0
Rabbi Trust \| Fair Value
Employee benefit plans
Fair value of assets held in Rabbi Trust	31,468	25,912
Level 1 \| Rabbi Trust
Employee benefit plans
Fair value of assets held in Rabbi Trust	31,468	25,912
Level 2 \| Rabbi Trust
Employee benefit plans
Fair value of assets held in Rabbi Trust	0	0
Level 3 \| Rabbi Trust
Employee benefit plans
Fair value of assets held in Rabbi Trust	0	0
Cash equivalents \| Rabbi Trust \| Fair Value
Employee benefit plans
Fair value of assets held in Rabbi Trust	8	8
Cash equivalents \| Level 1 \| Rabbi Trust
Employee benefit plans
Fair value of assets held in Rabbi Trust	8	8
Cash equivalents \| Level 2 \| Rabbi Trust
Employee benefit plans
Fair value of assets held in Rabbi Trust	0	0
Cash equivalents \| Level 3 \| Rabbi Trust
Employee benefit plans
Fair value of assets held in Rabbi Trust	0	0
Fixed income securities \| Rabbi Trust \| Fair Value
Employee benefit plans
Fair value of assets held in Rabbi Trust	12,442	10,201
Fixed income securities \| Level 1 \| Rabbi Trust
Employee benefit plans
Fair value of assets held in Rabbi Trust	12,442	10,201
Fixed income securities \| Level 2 \| Rabbi Trust
Employee benefit plans
Fair value of assets held in Rabbi Trust	0	0
Fixed income securities \| Level 3 \| Rabbi Trust
Employee benefit plans
Fair value of assets held in Rabbi Trust	0	0
Equity securities \| Rabbi Trust \| Fair Value
Employee benefit plans
Fair value of assets held in Rabbi Trust	19,018	15,703
Equity securities \| Level 1 \| Rabbi Trust
Employee benefit plans
Fair value of assets held in Rabbi Trust	19,018	15,703
Equity securities \| Level 2 \| Rabbi Trust
Employee benefit plans
Fair value of assets held in Rabbi Trust	0	0
Equity securities \| Level 3 \| Rabbi Trust
Employee benefit plans
Fair value of assets held in Rabbi Trust	$ 0	$ 0

Employee Benefit Plans 13 (Deta

Employee Benefit Plans 13 (Details) - SERP - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Change in Benefit Obligation:
Projected benefit obligation at beginning of year	$ 36,602	$ 29,703
Service cost	1,392	1,029	$ 1,193
Interest cost	915	988	1,069
Actuarial (gain) loss	(2,213)	5,479
Benefits paid	(607)	(597)
Projected benefit obligation at end of year	36,089	36,602	$ 29,703
Changes in Plan Assets:
Fair value of plan assets at beginning of year	0
Fair value of plan assets at end of year	0	0
Funded Status:
Net amount recognized as accrued pension cost	$ (36,089)	$ (36,602)

Employee Benefit Plans 14 (Deta

Employee Benefit Plans 14 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Amounts recognized on the balance sheets:
Non-current liabilities	$ (61,365)	$ (95,639)
SERP
Amounts recognized on the balance sheets:
Current liabilities	(949)	(602)
Non-current liabilities	(35,140)	(36,000)
Net amount recognized	(36,089)	(36,602)
Amounts recognized in regulatory assets consist of:
Prior service cost (credit)	0	0
Net loss	9,097	12,988
Regulatory assets (liabilities)	9,097	12,988	$ 8,352
Unfunded accrued cost	26,992	23,614
Net liability (asset) recognized	36,089	36,602
Changes in plan assets and benefit obligations recognized in regulatory assets:
Regulatory asset at beginning of year	12,988	8,352
Net (gain) loss	(2,213)	5,479
Amortization of prior service credit	0	0
Amortization of net loss	(1,678)	(843)
Total change in regulatory asset	(3,891)	4,636
Regulatory asset (liability) at end of year	9,097	12,988	8,352
Net periodic pension costs	3,985	2,860	2,733
Change in regulatory asset	(3,891)	4,636
Total recognized in net periodic pension cost and regulatory asset (liability)	94	7,496
Additional year-end information for plans with an accumulated benefit obligation in excess of plan assets:
Projected benefit obligation	36,089	36,602	$ 29,703
Accumulated benefit obligation	31,835	30,428
Fair value of plan assets	$ 0	$ 0
Weighted-average assumptions used to determine benefit obligations at December 31:
Discount rate	2.87%	2.52%
Rate of compensation increase		4.00%
SERP \| Maximum
Weighted-average assumptions used to determine benefit obligations at December 31:
Rate of compensation increase	4.50%
SERP \| Minimum
Weighted-average assumptions used to determine benefit obligations at December 31:
Rate of compensation increase	4.00%

Employee Benefit Plans 15 (Deta

Employee Benefit Plans 15 (Details) - SERP - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Components of Net Periodic Benefits Cost:
Service cost	$ 1,392	$ 1,029	$ 1,193
Interest cost	915	988	1,069
Amortization of prior service cost (credit)	0	0	0
Amortization of net loss	1,678	843	471
Net periodic pension cost under accounting standards	$ 3,985	$ 2,860	$ 2,733
Weighted-average assumptions used to determine net periodic cost:
Discount rate	2.52%	3.36%	4.40%
Rate of compensation increase		4.00%	4.00%
Rate of compensation increase		4.00%
Minimum
Weighted-average assumptions used to determine net periodic cost:
Rate of compensation increase	4.00%
Maximum
Weighted-average assumptions used to determine net periodic cost:
Rate of compensation increase	4.50%

Employee Benefit Plans 16 (Deta

Employee Benefit Plans 16 (Details) - SERP $ in Thousands	Dec. 31, 2021USD ($)
Employee benefit plans
2022	$ 949
2023	944
2024	1,195
2025	1,187
2026	2,154
Thereafter	11,444
Total	$ 17,873

Employee Benefit Plans 17 (Deta

Employee Benefit Plans 17 (Details) - USD ($) $ in Millions	12 Months Ended
Employee Benefit Plans 17 (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Employer's contribution	$ 2.7	$ 2.7	$ 2.5
Employer discretionary contribution amount	$ 1.9	$ 1.9	$ 1.6

Stock-Based Compensation Plan_2

Stock-Based Compensation Plans (Details) $ in Thousands	12 Months Ended
Stock-Based Compensation Plans (Details) $ in Thousands	Dec. 31, 2021USD ($)stock_planshares	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Stock compensation plans
Number of stock incentive plans \| stock_plan	3
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 115
Stock-based compensation recognized in the income statement, before taxes	2,566	$ 2,463	$ 2,517
Capitalized equity-based compensation cost	$ 336	299	265
Immediate vesting for employees of certain age and above	55 years
GSWC
Stock compensation plans
Stock-based compensation recognized in the income statement, before taxes	$ 2,313	2,349	2,253
Capitalized equity-based compensation cost	336	299	265
Nonqualified stock options
Stock compensation plans
Tax benefits from exercise of stock-based awards	1,400	1,200	1,800
Nonqualified stock options \| GSWC
Stock compensation plans
Tax benefits from exercise of stock-based awards	1,400	1,200	1,800
Restricted Stock Units \| Employees and directors
Stock compensation plans
Stock-based compensation recognized in the income statement, before taxes	2,566	2,463	2,517
Restricted Stock Units \| Employees and directors \| GSWC
Stock compensation plans
Stock-based compensation recognized in the income statement, before taxes	$ 2,313	$ 2,349	$ 2,253
Performance awards
Stock compensation plans
Vesting period	3 years
2000 and 2008 Employee Plans \| Nonqualified stock options
Stock compensation plans
Percentage of rights vesting in the third year from the date of grant	34.00%
2000 and 2008 Employee Plans \| Restricted Stock Units
Stock compensation plans
Common stock entitled to be received under each award \| shares	1
Percentage of rights vesting in the first two years from the date of grant	33.00%
Percentage of rights vesting in the third year from the date of grant	34.00%
2000 and 2008 Employee Plans \| Performance awards
Stock compensation plans
Vesting period	3 years
Percentage of rights vesting in the first two years from the date of grant	33.00%
Percentage of rights vesting in the third year from the date of grant	34.00%
2003 and 2013 Directors plans [Member]
Stock compensation plans
Vesting period	90 days
Maximum
Stock compensation plans
Chang in control, term	24
Weighted Average [Member]
Stock compensation plans
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 6 months
Weighted Average [Member] \| Restricted Stock [Member]
Stock compensation plans
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 5 months 26 days

Stock-Based Compensation Plan_3

Stock-Based Compensation Plans 2 (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of Options
Common Shares issued as a result of the exercise of stock options	0	1,800	30,998
Additional disclosure
Cash proceeds from the exercise of stock options		$ 30	$ 519
Unrecognized compensation cost	$ 115
Weighted Average Grant-Date Value
Capitalized equity-based compensation cost	$ 336	$ 299	265
Maximum
Additional disclosure
Percentage of target amount of performance shares	200.00%
Minimum
Additional disclosure
Percentage of target amount of performance shares	0.00%
Weighted Average [Member]
Additional disclosure
Expected recognition period for unrecognized compensation cost	1 year 6 months
Restricted Stock Units
Additional disclosure
Unrecognized compensation cost related to performance awards	$ 507
Number of Restricted/Performance Share Units
Restricted share units at the beginning of the period (in shares)	69,339
Granted (in shares)	21,765
Vested (in shares)	(38,208)
Forfeited (in shares)	(1,786)
Restricted share units at the end of the period (in shares)	51,110	69,339
Weighted Average Grant-Date Value
Restricted share units at the beginning of the period (in dollars per share)	$ 53.33
Granted (in dollars per share)	79.38
Vested (in dollars per share)	74.15
Forfeited (in dollars per share)	82.87
Restricted share units at the end of the period (in dollars per share)	$ 47.83	$ 53.33
Stock options
Additional disclosure
Tax benefit for the tax deduction from awards exercised	$ (1,400)	$ (1,200)	(1,800)
Performance awards
Additional disclosure
Vesting period	3 years
Period to meet the performance goals	3 years
Number of Restricted/Performance Share Units
Restricted share units at the beginning of the period (in shares)	57,960
Granted (in shares)	19,873
Performance criteria adjustment (in shares)	(1,775)
Vested (in shares)	(26,258)
Forfeited (in shares)	(890)
Restricted share units at the end of the period (in shares)	48,910	57,960
Weighted Average Grant-Date Value
Restricted share units at the beginning of the period (in dollars per share)	$ 66.4
Granted (in dollars per share)	79.43
Performance criteria adjustment (in dollars per share)	109.09
Vested (in dollars per share)	56.49
Forfeited (in dollars per share)	79.29
Restricted share units at the end of the period (in dollars per share)	$ 75.23	$ 66.4
GSWC
Weighted Average Grant-Date Value
Capitalized equity-based compensation cost	$ 336	$ 299	265
GSWC \| Stock options
Additional disclosure
Tax benefit for the tax deduction from awards exercised	$ (1,400)	$ (1,200)	$ (1,800)

Commitments (Details)

Commitments (Details) $ in Thousands	Dec. 31, 2021USD ($)
GSWC \| Water Supply
Estimated future minimum payments
2022	$ 436
2023	436
2024	436
2025	391
2026	346
Thereafter	1,345
Total	3,390
GSWC \| Water Supply \| Various third parties
Purchase commitments
Remaining amount of commitment	1,700
GSWC \| Water Supply \| Other various third parties
Estimated future minimum payments
Total	1,700
Electric: \| Electric Power Purchase Commitments [Member]
Estimated future minimum payments
2022	5,500
2023	4,900
2024	$ 4,100

Commitments Commitments 2 (Deta

Commitments Commitments 2 (Details) - Bear Valley Electric Service, Inc.	12 Months Ended
	Dec. 31, 2021unit
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Number of renewable energy credits that would be purchased	578,000
Minimum
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Derivative, Term of Contract	3 years
Maximum
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Derivative, Term of Contract	5 years

Commitments (Details)_2

Commitments (Details) $ in Thousands	12 Months Ended
Commitments (Details) $ in Thousands	Dec. 31, 2021USD ($)
Bear Valley Electric Service, Inc. \| Minimum
Purchase commitments
Derivative, Term of Contract	3 years
Bear Valley Electric Service, Inc. \| Minimum \| Purchase power contract
Purchase commitments
Derivative, Term of Contract	3 years
Bear Valley Electric Service, Inc. \| Maximum
Purchase commitments
Derivative, Term of Contract	5 years
Bear Valley Electric Service, Inc. \| Maximum \| Purchase power contract
Purchase commitments
Derivative, Term of Contract	5 years
Bear Valley Electric Service, Inc. \| Renewables Portfolio Standard [Member]
Purchase commitments
Purchase Obligation	$ 619
Electric \| Electric Power Purchase Commitments [Member]
Purchase commitments
2022	5,500
2023	4,900
2024	4,100
GSWC \| Water Supply
Purchase commitments
2022	436
2023	436
2024	436
2025	391
2026	346
Thereafter	1,345
Purchase Obligation	$ 3,390
Renewables Portfolio Standard [Member] \| Bear Valley Electric Service, Inc.
Purchase commitments
Derivative, Term of Contract	10 years

Contingencies (Details)

Contingencies (Details) $ in Millions	12 Months Ended
Contingencies (Details) $ in Millions	Dec. 31, 2021USD ($)
Contingencies
Term estimate for the environmental cleanup	2 years
Environmental Clean-Up and Remediation \| GSWC
Contingencies
Amount spent in clean-up and remediation activities	$ 6.1
Amount paid by the State of California Underground Storage Tank Fund for clean-up and remediation of plant facilities	1.5
Accrued liability for the estimated additional cost to complete the clean-up at the site	$ 1.3

Leases Lease- additional inform

Leases Lease- additional information (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease liabilities	$ 2,044	$ 2,013
Operating lease liabilities	8,920	9,636
Operating lease right-of-use assets	$ 10,479	$ 11,146

Leases Supplemental lease infor

Leases Supplemental lease information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Lease, Cost	$ 2,627	$ 2,873
Operating lease right-of-use assets	10,479	11,146
Short-term Lease, Cost	$ 273	$ 143
Operating Lease, Weighted Average Remaining Lease Term	5 years 11 months 26 days	6 years 7 months 13 days
Operating Lease, Weighted Average Discount Rate, Percent	3.70%	3.60%
Operating Lease, Payments, Use	$ 1,430	$ 27

Leases Lessee Operating Lease L

Leases Lessee Operating Lease Liability Maturity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
2022	$ 2,548
2023	2,135
2024	1,821
2025	1,651
2026	1,456
Thereafter	2,801
Total lease payments	12,412
Less: imputed interest	1,448
Total lease obligations	10,964
Less: current obligations	2,044	$ 2,013
Long-term lease obligations	8,920	9,636
Operating Lease, Expense	$ 2,500	$ 2,600	$ 2,800

Business Segments (Details)

Business Segments (Details) $ in Thousands	6 Months Ended		12 Months Ended
Business Segments (Details) $ in Thousands	Dec. 31, 2020USD ($)	Jun. 30, 2020USD ($)	Dec. 31, 2021USD ($)segment	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Details of reportable segment
Operating revenues			$ 498,853	$ 488,243	$ 473,869
Operating Income			140,977	130,499	127,073
Interest expense, net			(21,341)	(20,730)	(21,337)
Net utility plant	$ 1,512,043		1,626,004	1,512,043	1,415,705
Depreciation and amortization expense			39,596	36,850	35,397
Income Tax Expense (Benefit)			30,423	28,197	24,670
Capital additions			$ 144,515	130,423	151,940
Parent Company
Details of reportable segment
Number of reportable segments \| segment			3
Operating revenues			$ 0	0	0
Operating Income			(9)	(9)	(9)
Interest expense, net			(791)	(330)	(539)
Net utility plant	0		0	0	0
Depreciation and amortization expense			0	0	0
Income Tax Expense (Benefit)			(81)	(208)	(709)
Capital additions			$ 0	0	0
GSWC
Details of reportable segment
Number of reportable segments \| segment			1
Operating revenues			$ 347,112	349,284	359,378
Operating Income			107,573	102,896	105,092
Net utility plant	1,400,489		1,499,745	1,400,489
Depreciation and amortization expense			33,384	32,184	32,441
Income Tax Expense (Benefit)			22,095	21,704	20,177
GSWC \| Water Service Utility Operations [Member]
Details of reportable segment
Operating revenues			347,112	330,637	319,830
Operating Income			107,573	97,896	93,895
Interest expense, net			(21,046)	(20,312)	(20,304)
Net utility plant	1,400,489		1,499,745	1,400,489	1,322,062
Depreciation and amortization expense			33,384	30,969	29,956
Income Tax Expense (Benefit)			22,095	20,515	17,295
Capital additions			123,526	107,355	131,353
GSWC \| Electric:
Details of reportable segment
Operating revenues		$ 18,647		37,024	39,548
Operating Income				10,303	11,197
Interest expense, net				(584)	(1,228)
Net utility plant	89,308			89,308	72,680
Depreciation and amortization expense				2,479	2,485
Income Tax Expense (Benefit)				2,689	2,882
Capital additions				18,393	11,499
American States Utility Services \| Contracted services:
Details of reportable segment
Operating revenues			113,396	120,582	114,491
Operating Income			22,675	22,309	21,990
Interest expense, net			637	496	734
Net utility plant	22,246		19,751	22,246	20,963
Depreciation and amortization expense			3,640	3,402	2,956
Income Tax Expense (Benefit)			5,434	5,201	5,202
Capital additions			$ 1,130	4,675	$ 9,088
Period of Fixed Price Contracts to Operate and Maintain Water Systems at Various Military Bases			50 years
Bear Valley Electric Service, Inc. \| Electric:
Details of reportable segment
Operating revenues	$ 18,377		$ 38,345
Operating Income			10,738
Interest expense, net			(141)
Net utility plant			106,508
Depreciation and amortization expense			2,572
Income Tax Expense (Benefit)				$ 2,975
Capital additions			$ 19,859

Business Segments 2 (Details)

Business Segments 2 (Details) - USD ($) $ in Thousands	12 Months Ended
Business Segments 2 (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting [Abstract]
Total utility plant	$ 1,626,004	$ 1,512,043	$ 1,415,705
Other assets	274,979	279,560
Total Assets	1,900,983	1,791,603
Parent Company
Segment Reporting [Abstract]
Total utility plant	0	0	0
Total Assets	864,144	759,716
GSWC
Segment Reporting [Abstract]
Total utility plant	1,499,745	1,400,489
Total Assets	1,638,482	1,560,782
Segment Reporting Information [Line Items]
Depreciation on transportation equipment	379	353	316
Contracted services: \| American States Utility Services
Segment Reporting [Abstract]
Total utility plant	$ 19,751	$ 22,246	$ 20,963

Allowance for Doubtful Accoun_3

Allowance for Doubtful Accounts (Details) - USD ($)	12 Months Ended
Allowance for Doubtful Accounts (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Feb. 02, 2022	Jan. 26, 2022
Changes in allowance for doubtful accounts
Balance at beginning of year	$ 5,316,000	$ 916,000	$ 951,000
Provision charged to expense	8,150,000	5,016,000	609,000
Accounts written off, net of recoveries	9,897,000	616,000	644,000
Balance at end of year	3,569,000	5,316,000	916,000
Components of allowance for doubtful accounts
Allowance for doubtful accounts related to accounts receivable-customer	3,516,000	5,263,000	857,000
Allowance for doubtful accounts related to other accounts receivable	53,000	53,000	59,000
Total allowance for doubtful accounts	3,569,000	5,316,000	916,000
GSWC
Changes in allowance for doubtful accounts
Balance at beginning of year	4,960,000	916,000	951,000
Provision charged to expense	7,732,000	4,703,000	607,000
Provision for Doubtful Accounts transfer to BVESI	0	(79,000)	0
Accounts written off, net of recoveries	9,471,000	580,000	642,000
Balance at end of year	3,221,000	4,960,000	916,000
Components of allowance for doubtful accounts
Allowance for doubtful accounts related to accounts receivable-customer	3,168,000	4,907,000	857,000
Allowance for doubtful accounts related to other accounts receivable	53,000	53,000	59,000
Total allowance for doubtful accounts	3,221,000	$ 4,960,000	$ 916,000
Approval amount for the relief funding	$ 9,500,000
GSWC \| Subsequent Event
Components of allowance for doubtful accounts
Relief funding					$ 9,500,000
Bear Valley Electric Service, Inc. \| Subsequent Event
Components of allowance for doubtful accounts
Relief funding				$ 321,000

Statement of Cash Flows, Supp_3

Statement of Cash Flows, Supplemental Disclosures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Taxes and Interest Paid:
Income taxes paid	$ 29,153	$ 13,684	$ 22,496
Interest Paid, Excluding Capitalized Interest, Operating Activities	22,540	19,941	25,080
Non-Cash Transactions:
Accrued payables for investment in utility plant	32,855	27,861	23,736
Property installed by developers and conveyed	7,222	3,102	6,220
Noncash or Part Noncash Acquisition, Value of Assets Acquired	0	0	0
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	0	0	0
GSWC
Taxes and Interest Paid:
Income taxes paid	21,428	8,184	17,206
Interest Paid, Excluding Capitalized Interest, Operating Activities	21,156	19,681	23,925
Non-Cash Transactions:
Accrued payables for investment in utility plant	30,656	25,633	23,736
Property installed by developers and conveyed	7,222	3,102	6,220
Noncash or Part Noncash Acquisition, Value of Assets Acquired	0	71,324	0
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$ 0	$ 71,344	$ 0

Completion of Electric Utilit_3

Completion of Electric Utility Reorganization Plan (Details) - USD ($) $ in Thousands	Jul. 01, 2020	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Operating revenues				$ 498,853	$ 488,243	$ 473,869
Net Income				94,347	86,425	84,342
Net cash provided from operating activities				115,584	122,170	116,864
Net cash used in investing activities (capital expenditures)				(145,092)	(131,610)	(153,195)
Net cash provided from financing activities				(2,266)	44,843	30,524
Cash and cash equivalents, beginning of the year			$ 1,334	36,737	1,334	7,141
Cash and cash equivalents, end of year		$ 36,737		4,963	36,737	1,334
Bear Valley Electric Service, Inc.
Restructuring Cost and Reserve [Line Items]
Net assets transferred	$ 71,300
Bear Valley Electric Service, Inc.
Restructuring Cost and Reserve [Line Items]
Maximum borrowing capacity				35,000
Notes Payable				31,000
Incremental expansion of borrowing capacity	35,000			15,000
Bear Valley Electric Service, Inc. \| Electric
Restructuring Cost and Reserve [Line Items]
Operating revenues		18,377		38,345
Operating expenses		13,074		27,607
Operating income		5,303		10,738
Net Income		3,870		7,864
Net cash provided from operating activities		1,887		9,128
Net cash used in investing activities (capital expenditures)		(9,339)		(19,859)
Net cash provided from financing activities		7,799		10,827
Cash and Cash Equivalents, Period Increase (Decrease), Total		347		96
Cash and cash equivalents, beginning of the year				367
Cash and cash equivalents, end of year	$ 20	367		463	367
GSWC
Restructuring Cost and Reserve [Line Items]
Operating revenues				347,112	349,284	359,378
Net Income				69,215	64,971	66,663
Net cash provided from operating activities				100,294	110,337	96,628
Net cash used in investing activities (capital expenditures)				(124,259)	(117,684)	(144,188)
Net cash provided from financing activities				(11,088)	42,524	43,774
Cash and cash equivalents, beginning of the year			401	35,578	401	4,187
Cash and cash equivalents, end of year		$ 35,578		$ 525	35,578	401
GSWC \| Electric
Restructuring Cost and Reserve [Line Items]
Operating revenues			18,647		37,024	$ 39,548
Operating expenses			13,647
Operating income			5,000
Net Income			$ 3,408
Golden State Water Company and Bear Valley Electric Service, Inc. [Member] \| Electric
Restructuring Cost and Reserve [Line Items]
Operating revenues					37,024
Operating expenses					26,721
Operating income					10,303
Net Income					$ 7,278

SCHEDULE I - CONDENSED FINANC_3

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 4,963	$ 36,737
Total current assets	138,052	157,115
Deferred taxes and other assets	16,230	10,597
Total Assets	1,900,983	1,791,603
Liabilities and Capitalization
Income taxes payable	4,662	6,783
Other Liabilities, Current	11,498	10,437
Total current liabilities	155,574	118,572
Notes payable to banks	174,500	134,200
Total other credits	647,286	591,010
Common shareholder’s equity	685,947	641,673	$ 601,530	$ 558,223
Total capitalization	1,098,123	1,082,021
Total Capitalization and Liabilities	1,900,983	1,791,603
Parent Company
Assets
Cash and cash equivalents	51	441	$ 310	$ 34
Income Taxes Receivable	0	72
Inter-company loan receivables	79,722	32,819
Total current assets	79,773	33,332
Investments in subsidiaries	774,751	716,627
Deferred taxes and other assets	9,620	9,757
Total Assets	864,144	759,716
Liabilities and Capitalization
Income taxes payable	1,765	2,123
Other Liabilities, Current	309	272
Total current liabilities	2,074	2,395
Notes payable to banks	174,500	114,000
Deferred taxes and other liabilities	1,623	1,648
Total other credits	176,123	115,648
Common shareholder’s equity	685,947	641,673
Total capitalization	685,947	641,673
Total Capitalization and Liabilities	$ 864,144	$ 759,716

SCHEDULE I - CONDENSED FINANC_4

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT 2 (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed financial statements
Income Tax Expense (Benefit)	$ 30,423	$ 28,197	$ 24,670
Net Income	$ 94,347	$ 86,425	$ 84,342
Weighted Average Number of Shares Outstanding (in shares)	36,921	36,880	36,814
Basic Earnings Per Common Share (in USD per share)	$ 2.55	$ 2.34	$ 2.28
Weighted Average Number of Diluted Common Shares Outstanding (in shares)	37,010	36,995	36,964
Fully Diluted Earnings per Common Share (in USD per share)	$ 2.55	$ 2.33	$ 2.28
Dividends Paid Per Common Share (in USD per share)	$ 1.40	$ 1.28	$ 1.16
Parent Company
Condensed financial statements
Operating revenues and other income	$ 0	$ 0	$ 0
Operating expenses and other expenses	542	90	314
Operating expenses and other expenses	(542)	(90)	(314)
Equity in earnings of subsidiaries	94,808	86,307	83,947
Income before income taxes	94,266	86,217	83,633
Income Tax Expense (Benefit)	(81)	(208)	(709)
Net Income	$ 94,347	$ 86,425	$ 84,342
Basic Earnings Per Common Share (in USD per share)	$ 2.55	$ 2.34	$ 2.28
Fully Diluted Earnings per Common Share (in USD per share)	2.55	2.33	2.28
Dividends Paid Per Common Share (in USD per share)	$ 1.40	$ 1.28	$ 1.16

SCHEDULE I - CONDENSED FINANC_5

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT 3 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed financial statements
Cash Flows From Operating Activities	$ 115,584	$ 122,170	$ 116,864
Cash Flows From Investing Activities:
Net Cash Provided by (Used in) Investing Activities	(145,092)	(131,610)	(153,195)
Cash Flows From Financing Activities:
Proceeds from stock option exercises		30	519
Dividends paid	(51,689)	(47,206)	(42,702)
Net cash provided (used) in financing activities	(2,266)	44,843	30,524
Change in cash and equivalents	(31,774)	35,403	(5,807)
Cash and cash equivalents, beginning of period	36,737
Cash and cash equivalents, end of year	4,963	36,737
Parent Company
Condensed financial statements
Cash Flows From Operating Activities	36,799	47,307	40,459
Cash Flows From Investing Activities:
Loans (made to)/repaid from, wholly-owned subsidiaries	(46,000)	151,000	(107,500)
Increase in investment of subsidiary	0	(60,000)	0
Net Cash Provided by (Used in) Investing Activities	(46,000)	91,000	(107,500)
Cash Flows From Financing Activities:
Proceeds from stock option exercises	0	30	519
Net change in notes payable to banks	60,500	(91,000)	109,500
Proceeds from note payable to GSWC	(26,000)	(6,000)	0
Repayment of note payable to GSWC	26,000	6,000	0
Dividends paid	(51,689)	(47,206)	(42,702)
Net cash provided (used) in financing activities	8,811	(138,176)	67,317
Change in cash and equivalents	(390)	131	276
Cash and cash equivalents, beginning of period	441	310	34
Cash and cash equivalents, end of year	$ 51	$ 441	$ 310

SCHEDULE I - CONDENSED FINANC_6

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT 4 (Details)	12 Months Ended
	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Note payable to banks
Line of credit facility, current borrowing capacity	$ 200,000,000
Parent
Note payable to banks
Line of credit facility, current borrowing capacity	30,000,000
Notes receivable, related parties	26,000,000	$ 6,000,000
Notes payable, related parties	$ 0
Syndicated revolving credit facility
Note payable to banks
Variable rate basis	LIBOR
Syndicated revolving credit facility \| Minimum
Note payable to banks
Interest coverage ratio	3.25
Syndicated revolving credit facility \| Maximum
Note payable to banks
Total funded debt ratio	0.65
Parent Company
Note payable to banks
Line of credit facility, current borrowing capacity	$ 200,000,000
Parent Company \| Syndicated revolving credit facility
Note payable to banks
Interest coverage ratio	8.21
Total funded debt ratio	0.47
Parent Company \| Syndicated revolving credit facility \| Minimum
Note payable to banks
Interest coverage ratio	3.25
Total funded debt ratio	0.65
Parent Company \| Syndicated revolving credit facility \| Maximum
Note payable to banks
Total funded debt ratio	1
Parent Company \| Syndicated revolving credit facility \| Letters of credit
Note payable to banks
Maximum borrowing capacity	$ 25,000,000
Letter of credit, amount	$ 455,000
Letter of credit fee (as a percent)	0.65%
Subsidiaries
Note payable to banks
Dividends paid	$ (38,300,000)	$ (47,300,000)	$ (42,700,000)

SCHEDULE I - CONDENSED FINANC_7

SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF PARENT 5 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Long-term Debt [Member]
Note payable to banks
Balance Outstanding at December 31,	$ 205,500	$ 134,200
Short-term borrowing (excluding letters of credit)
Note payable to banks
Average Amount Outstanding	$ 165,167	$ 162,995
Weighted Average Annual Interest Rate (as a percent)	1.05%	1.47%
Maximum Amount Outstanding	$ 205,500	$ 249,200
AWR \| Long-term Debt [Member]
Note payable to banks
Balance Outstanding at December 31,	$ 174,500	$ 114,000
AWR \| Short-term borrowing (excluding letters of credit)
Note payable to banks
Interest Rate at the end of the period (as a percent)	0.78%	1.19%
Average Amount Outstanding	$ 139,926	$ 160,495
Weighted Average Annual Interest Rate (as a percent)	0.91%	1.47%
Maximum Amount Outstanding	$ 174,500	$ 249,000