The York Water Company (YORW) 10-Q5 Nov 212021 Q3 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2021	Nov. 05, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Document Transition Report	false
Entity File Number	001-34245
Entity Registrant Name	YORK WATER CO
Entity Central Index Key	0000108985
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	23-1242500
Entity Address, Address Line One	130 East Market Street
Entity Address, City or Town	York
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	17401
City Area Code	717
Local Phone Number	845-3601
Title of 12(b) Security	Common Stock, No par value
Trading Symbol	YORW
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		13,104,609

Balance Sheets (Unaudited)

Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
ASSETS
UTILITY PLANT, at original cost	$ 467,343	$ 438,670
Plant acquisition adjustments	(3,657)	(3,707)
Accumulated depreciation	(96,123)	(91,340)
Net utility plant	367,563	343,623
OTHER PHYSICAL PROPERTY, net of accumulated depreciation of $477 in 2021 and $458 in 2020	723	742
CURRENT ASSETS:
Cash and cash equivalents	1	2
Restricted cash	0	5,000
Accounts receivable, net of reserves of $856 in 2021 and $655 in 2020	3,935	5,184
Unbilled revenues	3,047	2,847
Recoverable income taxes	21	721
Materials and supplies inventories, at cost	1,379	1,010
Prepaid expenses	1,790	1,526
Total current assets	10,173	16,290
OTHER LONG-TERM ASSETS:
Prepaid pension cost	4,598	2,209
Note receivable	255	255
Deferred regulatory assets	43,151	39,893
Other assets	4,285	3,945
Total other long-term assets	52,289	46,302
Total Assets	430,748	406,957
COMMON STOCKHOLDERS' EQUITY:
Common stock, no par value, authorized 46,500,000 shares, issued and outstanding 13,102,924 shares in 2021 and 13,060,817 shares in 2020	87,714	85,935
Retained earnings	62,946	57,317
Total common stockholders' equity	150,660	143,252
PREFERRED STOCK, authorized 500,000 shares, no shares issued	0	0
LONG-TERM DEBT	132,197	123,573
COMMITMENTS
CURRENT LIABILITIES:
Accounts payable	7,455	6,540
Dividends payable	2,202	2,192
Accrued compensation and benefits	1,519	1,417
Accrued interest	1,068	959
Deferred regulatory liabilities	607	525
Other accrued expenses	360	360
Total current liabilities	13,211	11,993
DEFERRED CREDITS:
Customers' advances for construction	11,358	10,326
Deferred income taxes	46,922	43,538
Deferred employee benefits	4,834	4,793
Deferred regulatory liabilities	27,905	25,444
Other deferred credits	2,203	2,731
Total deferred credits	93,222	86,832
Contributions in aid of construction	41,458	41,307
Total Stockholders' Equity and Liabilities	$ 430,748	$ 406,957

Balance Sheets (Unaudited) (Par

Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
ASSETS
Other physical property, accumulated depreciation	$ 477	$ 458
CURRENT ASSETS:
Accounts receivables, reserves	$ 856	$ 655
COMMON STOCKHOLDERS' EQUITY:
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, authorized (in shares)	46,500,000	46,500,000
Common stock, issued (in shares)	13,102,924	13,060,817
Common stock, outstanding (in shares)	13,102,924	13,060,817
Preferred stock, authorized (in shares)	500,000	500,000
Preferred stock, issued (in shares)	0	0

Statements of Income (Unaudited

Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Statements of Income (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statements of Income [Abstract]
OPERATING REVENUES:	$ 14,503	$ 14,257	$ 41,385	$ 40,454
OPERATING EXPENSES:
Operation and maintenance	2,997	2,659	8,752	7,940
Administrative and general	2,292	2,257	7,144	6,573
Depreciation and amortization	2,223	2,046	6,595	6,113
Taxes other than income taxes	307	274	954	898
Operating expenses	7,819	7,236	23,445	21,524
Operating income	6,684	7,021	17,940	18,930
OTHER INCOME (EXPENSES):
Interest on debt	(1,237)	(1,152)	(3,673)	(3,503)
Allowance for funds used during construction	310	115	883	330
Other pension costs	(304)	(341)	(911)	(1,022)
Gain on life insurance	0	0	0	515
Other income (expenses), net	(34)	(41)	(179)	(287)
Other income (expenses)	(1,265)	(1,419)	(3,880)	(3,967)
Income before income taxes	5,419	5,602	14,060	14,963
Income taxes	625	898	1,077	2,075
Net Income	$ 4,794	$ 4,704	$ 12,983	$ 12,888
Basic Earnings Per Share (in dollars per share)	$ 0.36	$ 0.36	$ 0.99	$ 0.99
Diluted Earnings Per Share (in dollars per share)	$ 0.36	$ 0.36	$ 0.99	$ 0.99

Statements of Common Stockholde

Statements of Common Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2019	$ 83,976	$ 50,209	$ 134,185
Balance (in shares) at Dec. 31, 2019	13,014,898
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	12,888	12,888
Cash dividends declared	0	(7,044)	(7,044)
Issuance of common stock under dividend reinvestment, direct stock and employee stock purchase plans	$ 1,273	0	1,273
Issuance of common stock under dividend reinvestment, direct stock and employee stock purchase plans (in shares)	29,427
Stock-based compensation	$ 126	0	126
Stock-based compensation (in shares)	4,912
Balance at Sep. 30, 2020	$ 85,375	56,053	141,428
Balance (in shares) at Sep. 30, 2020	13,049,237
Balance at Jun. 30, 2020	$ 84,872	53,700	138,572
Balance (in shares) at Jun. 30, 2020	13,033,999
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	4,704	4,704
Cash dividends declared	0	(2,351)	(2,351)
Issuance of common stock under dividend reinvestment, direct stock and employee stock purchase plans	$ 429	0	429
Issuance of common stock under dividend reinvestment, direct stock and employee stock purchase plans (in shares)	10,326
Stock-based compensation	$ 74	0	74
Stock-based compensation (in shares)	4,912
Balance at Sep. 30, 2020	$ 85,375	56,053	141,428
Balance (in shares) at Sep. 30, 2020	13,049,237
Balance at Dec. 31, 2020	$ 85,935	57,317	$ 143,252
Balance (in shares) at Dec. 31, 2020	13,060,817		13,060,817
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	12,983	$ 12,983
Cash dividends declared	0	(7,354)	(7,354)
Issuance of common stock under dividend reinvestment, direct stock and employee stock purchase plans	$ 1,612	0	1,612
Issuance of common stock under dividend reinvestment, direct stock and employee stock purchase plans (in shares)	35,937
Stock-based compensation	$ 167	0	167
Stock-based compensation (in shares)	6,170
Balance at Sep. 30, 2021	$ 87,714	62,946	$ 150,660
Balance (in shares) at Sep. 30, 2021	13,102,924		13,102,924
Balance at Jun. 30, 2021	$ 87,100	60,606	$ 147,706
Balance (in shares) at Jun. 30, 2021	13,090,055
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 0	4,794	4,794
Cash dividends declared	0	(2,454)	(2,454)
Issuance of common stock under dividend reinvestment, direct stock and employee stock purchase plans	$ 568	0	568
Issuance of common stock under dividend reinvestment, direct stock and employee stock purchase plans (in shares)	12,869
Stock-based compensation	$ 46	0	46
Stock-based compensation (in shares)	0
Balance at Sep. 30, 2021	$ 87,714	$ 62,946	$ 150,660
Balance (in shares) at Sep. 30, 2021	13,102,924		13,102,924

Statements of Common Stockhol_2

Statements of Common Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared (in dollars per share)	$ 0.1874	$ 0.1802	$ 0.5622	$ 0.5406

Statements of Cash Flows (Unaud

Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 12,983	$ 12,888
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on life insurance	0	(515)
Depreciation and amortization	6,595	6,113
Stock-based compensation	167	126
Increase in deferred income taxes	53	93
Other	46	342
Changes in assets and liabilities:
(Increase) decrease in accounts receivable and unbilled revenues	745	(1,657)
Decrease in recoverable income taxes	700	497
Increase in materials and supplies, prepaid expenses, prepaid pension cost, regulatory and other assets	(6,911)	(6,184)
Increase in accounts payable, accrued compensation and benefits, accrued expenses, deferred employee benefits, regulatory liabilities, and other deferred credits	3,989	4,449
Increase in accrued interest	109	154
Net cash provided by operating activities	18,476	16,306
CASH FLOWS FROM INVESTING ACTIVITIES:
Utility plant additions, including debt portion of allowance for funds used during construction of $493 in 2021 and $184 in 2020	(27,434)	(15,973)
Acquisitions of wastewater systems	0	(1,158)
Cash received from surrender of life insurance policies	0	672
Net cash used in investing activities	(27,434)	(16,459)
CASH FLOWS FROM FINANCING ACTIVITIES:
Customers' advances for construction and contributions in aid of construction	1,955	2,760
Repayments of customer advances	(772)	(225)
Proceeds of long-term debt issues	37,452	53,671
Debt issuance costs	0	(162)
Repayments of long-term debt	(28,960)	(37,843)
Changes in cash overdraft position	14	(1,384)
Issuance of common stock	1,612	1,273
Dividends paid	(7,344)	(7,038)
Net cash provided by financing activities	3,957	11,052
Net change in cash, cash equivalents, and restricted cash	(5,001)	10,899
Cash, cash equivalents, and restricted cash at beginning of period	5,002	2
Cash and cash equivalents at end of period	1	10,901
Cash paid during the period for:
Interest, net of amounts capitalized	2,936	3,029
Income taxes	$ 217	$ 1,753
Supplemental schedule of non-cash investing and financing activities:
Accounts payable includes $3,562 in 2021 and $3,647 in 2020 for the construction of utility plant
Contributions in aid of construction includes $1,024 in 2020 recorded as part of the Felton Borough acquisition

Statements of Cash Flows (Una_2

Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
CASH FLOWS FROM INVESTING ACTIVITIES:
Utility plant additions, debt portion of allowance for funds used during construction	$ 493	$ 184
Supplemental schedule of non-cash investing and financing activities:
Accounts payable for construction of utility plant	$ 3,562	3,647
Contributions in aid of construction recorded as part of the Felton Borough acquisition		$ 1,024

Basis of Presentation

Basis of Presentation	9 Months Ended
Basis of Presentation	Sep. 30, 2021
Basis of Presentation [Abstract]
Basis of Presentation	1. Basis of Presentation The interim financial statements are unaudited but, in the opinion of management, reflect all adjustments, consisting of only normal recurring accruals, necessary for a fair presentation of results for such periods. Because the financial statements cover an interim period, they do not include all disclosures and notes normally provided in annual financial statements, and therefore, should be read in conjunction with the financial statements and notes thereto contained in the Company's Annual Report on Form 10-K for the year ended December 31, 2020. Operating results for the are not necessarily indicative of the results that may be expected for the year ending December 31, . Additionally, based on the duration and severity of the novel coronavirus ("COVID-19") pandemic, the Company is uncertain of the ultimate impact it could have on the business.

Accounts Receivable and Contrac

Accounts Receivable and Contract Assets	9 Months Ended
Accounts Receivable and Contract Assets	Sep. 30, 2021
Accounts Receivable and Contract Assets [Abstract]
Accounts Receivable and Contract Assets	2. Accounts Receivable and Contract Assets Accounts receivable and contract assets are summarized in the following table: As of Sep. 30, 2021 As of Dec. 31, 2020 Change Accounts receivable – customers $ 4,716 $ 5,633 $ (917 ) Other receivables 75 206 (131 ) 4,791 5,839 (1,048 ) Less: allowance for doubtful accounts (856 ) (655 ) (201 ) Accounts receivable, net $ 3,935 $ 5,184 $ (1,249 ) Unbilled revenue $ 3,047 $ 2,847 $ 200 Differences in timing of revenue recognition, billings, and cash collections result in receivables and contract assets. Generally, billing occurs subsequent to revenue recognition, resulting in a contract asset reported as unbilled revenue on the balance sheet. The Company does not receive advances or deposits from customers before revenue is recognized so no contract liabilities are reported. Accounts receivable are recorded when the right to consideration becomes unconditional and are presented separately on the balance sheet. The changes in accounts receivable – customers and in unbilled revenue were primarily due to normal timing difference between performance and the customer’s payments.

Common Stock and Earnings Per S

Common Stock and Earnings Per Share	9 Months Ended
Common Stock and Earnings Per Share	Sep. 30, 2021
Common Stock and Earnings Per Share [Abstract]
Common Stock and Earnings Per Share	3. Common Stock and Earnings Per Share Net income of $4,794 and $4,704 for the three months ended September 30, 2021 and 2020, respectively, and $12,983 and $12,888 for the nine months ended September 30, 2021 and 2020, respectively, is used to calculate both basic and diluted earnings per share. Basic earnings per share is based on the weighted average number of common shares outstanding. Diluted earnings per share is based on the weighted average number of common shares outstanding plus potentially dilutive shares. The dilutive effect of employee stock-based compensation is included in the computation of diluted earnings per share and is calculated using the treasury stock method and expected proceeds upon exercise or issuance of the stock-based compensation. The following table summarizes the shares used in computing basic and diluted earnings per share: Three Months Ended September 30 Nine Months Ended September 30 2021 2020 2021 2020 Weighted average common shares, basic 13,083,762 13,032,389 13,069,582 13,021,398 Effect of dilutive securities: Employee stock-based compensation 563 1,164 347 565 Weighted average common shares, diluted 13,084,325 13,033,553 13,069,929 13,021,963 On March 11, 2013, the Board of Directors, or the Board, authorized a share repurchase program granting the Company authority to repurchase up to 1,200,000 shares of the Company's common stock from time to time. The stock repurchase program has no specific end date and the Company may repurchase shares in the open market or through privately negotiated transactions. The Company may suspend or discontinue the repurchase program at any time. No shares were repurchased during the three or nine months ended September 30, 2021 and 2020. As of September 30, 2021, 618,004 shares remain authorized for repurchase.

Debt

Debt	9 Months Ended
Debt	Sep. 30, 2021
Debt [Abstract]
Debt	4. Debt As of Sep. 30, 2021 As of Dec. 31, 2020 8.43 $ 7,500 $ 7,500 Variable Rate Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series 2008A, due 2029 12,000 12,000 3.00 10,500 10,500 3.10 14,870 14,870 3.23 15,000 15,000 4.00 4.50 10,000 10,000 4.54 20,000 20,000 3.24% Senior Notes, due 2050 30,000 30,000 Committed Line of Credit, due September 2023 15,192 6,700 Total long-term debt 135,062 126,570 Less discount on issuance of long-term debt (172 ) (181 ) Less unamortized debt issuance costs (2,693 ) (2,816 ) Long-term portion $ 132,197 $ 123,573 In the third quarter of 2021, the Company renewed its committed line of credit and extended the maturity date to September 2023.

Interest Rate Swap Agreement

Interest Rate Swap Agreement	9 Months Ended
Interest Rate Swap Agreement	Sep. 30, 2021
Interest Rate Swap Agreement [Abstract]
Interest Rate Swap Agreement	5. Interest Rate Swap Agreement The Company is exposed to certain risks relating to its ongoing business operations. The primary risk managed by using derivative instruments is interest rate risk. The Company utilizes an interest rate swap agreement to effectively convert the Company's $12,000 variable-rate debt issue to a fixed rate. Interest rate swaps are contracts in which a series of interest rate cash flows are exchanged over a prescribed period. The notional amount on which the interest payments are based ($12,000) is not exchanged. The interest rate swap provides that the Company pays the counterparty a fixed interest rate of 3.16% on the notional amount of $12,000. In exchange, the counterparty pays the Company a variable interest rate based on 59% of the U.S. Dollar one-month LIBOR rate on the notional amount. The intent is for the variable rate received from the swap counterparty to approximate the variable rate the Company pays to bondholders on its variable rate debt issue, resulting in a fixed rate being paid to the swap counterparty and reducing the Company's interest rate risk. The Company’s net payment rate on the swap was 3.13% and 3.08% for the three months ended September 30, 2021 and 2020, respectively, and 3.06% and 2.76% for the nine months ended September 30, 2021 and 2020, respectively. The interest rate swap agreement is classified as a financial derivative used for non-trading activities. The accounting standards regarding accounting for derivatives and hedging activities require companies to recognize all derivative instruments as either assets or liabilities at fair value on the balance sheet. In accordance with the standards, the interest rate swap is recorded on the balance sheet in other deferred credits at fair value (see Note 6). The Company uses regulatory accounting treatment rather than hedge accounting to defer the unrealized gains and losses on its interest rate swap. These unrealized gains and losses are recorded as a regulatory asset. Based on current ratemaking treatment, the Company expects the unrealized gains and losses to be recognized in rates as a component of interest expense as the swap settlements occur. Swap settlements are recorded in the income statement with the hedged item as interest expense. Swap settlements resulted in the reclassification from regulatory assets to interest expense of $94 and $93 for the three months ended September 30, 2021 and 2020, respectively, and $278 and $249 for the nine months ended September 30, 2021 and 2020, respectively. The overall swap result was a (gain) loss of $(31) and $10 for the three months ended September 30, 2021 and 2020, respectively, and $(250) and $911 for the nine months ended September 30, 2021 and 2020, respectively. The Company expects to reclassify $371 from regulatory assets to interest expense as a result of swap settlements over the next 12 months. The interest rate swap agreement contains provisions that require the Company to maintain a credit rating of at least BBB- with Standard & Poor's. If the Company's rating were to fall below this rating, it would be in violation of these provisions, and the counterparty to the derivative could request immediate payment if the derivative was in a liability position. On October 8, 2021, Standard & Poor's affirmed the Company's credit rating at A-, with a stable outlook and adequate liquidity. The Company's interest rate swap was in a liability position as of September 30, 2021. If a violation due to credit rating, or some other default provision, were triggered on September 30, 2021, the Company would have been required to pay the counterparty approximately $2,232. The interest rate swap will expire on October 1, 2029. Other than the interest rate swap, the Company has no other derivative instruments.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
Fair Value of Financial Instruments	Sep. 30, 2021
Fair Value of Financial Instruments [Abstract]
Fair Value of Financial Instruments	6. Fair Value of Financial Instruments The accounting standards regarding fair value measurements establish a fair value hierarchy which indicates the extent to which inputs used in measuring fair value are observable in the market. Level 1 inputs include quoted prices for identical instruments and are the most observable. Level 2 inputs include quoted prices for similar assets and observable inputs such as interest rates, commodity rates and yield curves. Level 3 inputs are not observable in the market and include management’s own judgments about the assumptions market participants would use in pricing the asset or liability. The Company has recorded its interest rate swap liability at fair value in accordance with the standards. The liability is recorded under the caption “Other deferred credits” on the balance sheet. The table below illustrates the fair value of the interest rate swap as of the end of the reporting period. Description September 30, 2021 Fair Value Measurements at Reporting Date Using Significant Other Observable Inputs (Level 2) Interest Rate Swap $2,203 $2,203 Fair values are measured as the present value of all expected future cash flows based on the LIBOR-based swap yield curve as of the date of the valuation. These inputs to this calculation are deemed to be Level 2 inputs. The balance sheet carrying value reflects the Company's credit quality as of September 30, 2021. The rate used in discounting all prospective cash flows anticipated to be made under this swap reflects a representation of the yield to maturity for 30-year debt on utilities rated A- as of September 30, 2021. The use of the Company's credit rating resulted in a reduction in the fair value of the swap liability of $29 as of September 30, 2021. The fair value of the swap reflecting the Company's credit quality as of December 31, 2020 is shown in the table below. Description December 31, 2020 Fair Value Measurements at Reporting Date Using Significant Other Observable Inputs (Level 2) Interest Rate Swap $2,731 $2,731 The carrying amount of current assets and liabilities that are considered financial instruments approximates fair value as of the dates presented. The Company's total long-term debt, with a carrying value of $135,062 at September 30, 2021, and $126,570 at December 31, 2020, had an estimated fair value of approximately $150,000 and $151,000, respectively. The estimated fair value of debt was calculated using a discounted cash flow technique that incorporates a market interest yield curve with adjustments for duration and risk profile. These inputs to this calculation are deemed to be Level 2 inputs. The Company recognized its credit rating in determining the yield curve, and did not factor in third party credit enhancements including the letter of credit on the 2008 Pennsylvania Economic Development Financing Authority Series A issue. Customers' advances for construction and note receivable had carrying values at September 30, 2021 of $11,358 and $255, respectively. At December 31, 2020, customers' advances for construction and note receivable had carrying values of $10,326 and $255, respectively. The relative fair values of these amounts cannot be accurately estimated since the timing of future payment streams is dependent upon several factors, including new customer connections, customer consumption levels and future rate increases.

Commitments

Commitments	9 Months Ended
Commitments	Sep. 30, 2021
Commitments [Abstract]
Commitments	7. Commitments The Company entered into a consent order agreement with the Pennsylvania Department of Environmental Protection in December 2016 after the Company determined it exceeded the action level for lead as established by the Lead and Copper Rule, or LCR, issued by the U.S. Environmental Protection Agency. The Company did not have an exceedance in any subsequent compliance test. Under the agreement, the Company successfully completed its commitment to exceed the LCR replacement schedule by replacing all the known company-owned lead service lines within four years from the agreement. Any additional company-owned lead service lines that are discovered will be replaced and included in utility plant but are not expected to have a material impact on the financial position of the Company. The Company was granted approval by the Pennsylvania Public Utility Commission, or PPUC, to modify its tariff to include the cost of the annual replacement of up to lead customer-owned service lines over from the agreement. The tariff modification allows the Company to replace customer-owned service lines at its own initial cost. The Company will record the costs as a regulatory asset to be recovered in future base rates to customers, over a period. The cost for the customer-owned lead service line replacements was approximately $ and $ through and , respectively, and is included as a regulatory asset.

Revenue

Revenue	9 Months Ended
Revenue	Sep. 30, 2021
Revenue [Abstract]
Revenue	8. Revenue The following table shows the Company’s revenues disaggregated by service and customer type. Three Months Ended September 30 Nine Months Ended September 30 2021 2020 2021 2020 Water utility service Residential $ 8,872 $ 8,902 $ 25,560 $ 25,643 Commercial and industrial 3,952 3,774 10,891 10,331 Fire protection 827 795 2,428 2,379 Wastewater utility service Residential 481 446 1,426 1,281 Commercial and industrial 79 78 237 229 Billing and revenue collection services 121 118 360 147 Collection services 18 – 29 14 Other revenue 18 4 38 14 Total Revenue from Contracts with Customers 14,368 14,117 40,969 40,038 Rents from regulated property 135 140 416 416 Total Operating Revenue $ 14,503 $ 14,257 $ 41,385 $ 40,454 Utility Service The Company provides utility service as a distinct and single performance obligation to each of its water and wastewater customers. The transaction price is detailed in the tariff pursuant to an order by the PPUC and made publicly available. There is no variable consideration and no free service, special rates, or subnormal charges to any customer. Due to the fact that the contract includes a single performance obligation, no judgment is required to allocate the transaction price. The performance obligation is satisfied over time through the continuous provision of utility service through a stand-ready obligation to perform and the transfer of water or the collection of wastewater through a series of distinct transactions that are identical in nature and have the same pattern of transfer to the customer. The Company uses an output method to recognize the utility service revenue over time. The stand-ready obligation is recognized through the passage of time in the form of a fixed charge and the transfer of water or the collection of wastewater is recognized at a per unit rate based on the actual or estimated flow through the meter. Each customer is invoiced every month and the invoice is due within twenty days. The utility service has no returns or warranties associated with it. No revenue is recognized from performance obligations satisfied in prior periods and no performance obligations remain unsatisfied as of the end of the reporting period. A contract asset for unbilled revenue is recognized for the passage of time and the actual or estimated usage from the latest meter reading to the end of the accounting period. The methodology is standardized and consistently applied to reduce bias and the need for judgment. Billing and Revenue Collection Service The Company provides billing and revenue collection service as distinct performance obligations to three municipalities within the service territory of the Company. The municipalities provide wastewater service to their residents and the Company acts as the billing and revenue collection agent for the municipalities. The transaction price is a fixed amount per bill prepared as established in the contract. There is no variable consideration. Due to the fact that both the billing performance obligation and the revenue collection performance obligation are materially complete by the end of the reporting period, the Company does not allocate the transaction price between the two performance obligations. The performance obligations are satisfied at a point in time when the bills are sent as the municipalities receive all the benefits and bears all of the risk of non-collection at that time. Each municipality is invoiced when the bills are complete and the invoice is due within thirty days. The billing and revenue collection service has no returns or warranties associated with it. No revenue is recognized from performance obligations satisfied in prior periods and no performance obligations remain unsatisfied as of the end of the reporting period. Collection Service The Company provides collection service as a distinct and single performance obligation to several municipalities within the service territory of the Company. The municipalities provide wastewater service to their residents. If those residents are delinquent in paying for their wastewater service, the municipalities request that the Company post for and shut off the supply of water to the premises of those residents. When the resident is no longer delinquent, the Company will restore water service to the premises. The transaction price for each posting, each shut off, and each restoration is a fixed amount as established in the contract. There is no variable consideration. Due to the fact that the contract includes a single performance obligation, no judgment is required to allocate the transaction price. The performance obligation is satisfied at a point in time when the posting, shut off, or restoration is completed as the municipalities receive all the benefits in the form of payment or no longer providing wastewater service. Each municipality is invoiced periodically for the posting, shut offs, and restorations that have been completed since the last billing and the invoice is due within thirty days. The collection service has no returns or warranties associated with it. No revenue is recognized from performance obligations satisfied in prior periods and no performance obligations remain unsatisfied as of the end of the reporting period. A contract asset for unbilled revenue is recognized for postings, shut offs, and restorations that have been completed from the last billing to the end of the accounting period. Service Line Protection Plan The Company provides service line protection as a distinct and single performance obligation to current water customers that choose to participate. The transaction price is detailed in the plan’s terms and conditions and made publicly available. There is no variable consideration. Due to the fact that the contract includes a single performance obligation, no judgment is required to allocate the transaction price. The performance obligation is satisfied over time through the continuous provision of service line protection through a stand-ready obligation to perform. The Company uses an output method to recognize the service line protection revenue over time. The stand-ready obligation is recognized through the passage of time. A customer has a choice to prepay for an entire year or to pay in advance each month. The service line protection plan has no returns or extended warranties associated with it. No revenue is recognized from performance obligations satisfied in prior periods and no material performance obligations remain unsatisfied as of the end of the reporting period.

Rate Matters

Rate Matters	9 Months Ended
Rate Matters	Sep. 30, 2021
Rate Matters [Abstract]
Rate Matters	9. Rate Matters From time to time, the Company files applications for rate increases with the PPUC and is granted rate relief as a result of such requests. Most recently, the PPUC authorized an increase in rates effective March 1, 2019. The PPUC permits water utilities to collect a distribution system improvement charge, or DSIC. The DSIC allows the Company to add a charge to customers' bills for qualified replacement costs of certain infrastructure without submitting a rate filing. This surcharge mechanism typically adjusts periodically based on additional qualified capital expenditures completed or anticipated in a future period. The DSIC is capped at 5% of base rates, and is reset to zero when new base rates that reflect the costs of those additions become effective or when a utility's earnings exceed a regulatory benchmark.

Pensions

Pensions	9 Months Ended
Pensions	Sep. 30, 2021
Pensions [Abstract]
Pensions	10. Pensions Components of Net Periodic Pension Cost Three Months Ended September 30 Nine Months Ended September 30 2021 2020 2021 2020 Service cost $ 271 $ 234 $ 814 $ 703 Interest cost 302 365 906 1,093 Expected return on plan assets (913 ) (800 ) (2,739 ) (2,399 ) Amortization of actuarial loss 121 92 363 277 Amortization of prior service cost (3 ) (3 ) (9 ) (9 ) Rate-regulated adjustment 797 687 2,390 2,060 Net periodic pension expense $ 575 $ 575 $ 1,725 $ 1,725 Pension service cost is recorded in operating expenses. All other components of net periodic pension cost are recorded as other pension costs in other income (expenses). Employer Contributions The Company previously disclosed in its financial statements for the year ended that it expected to contribute $ to its pension plans in . For the

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
Stock-Based Compensation	Sep. 30, 2021
Stock-Based Compensation [Abstract]
Stock-Based Compensation	11. Stock-Based Compensation On May 2, 2016 , the Company’s stockholders approved The York Water Company Long-Term Incentive Plan, or LTIP. The LTIP was adopted to provide the incentive of long-term stock-based awards to officers, directors and key employees. The LTIP provides for the granting of nonqualified stock options, incentive stock options, stock appreciation rights, performance restricted stock grants and units, restricted stock grants and units, and unrestricted stock grants. A maximum of 100,000 shares of common stock may be issued under the LTIP over the ten-year life of the plan. The maximum number of shares of common stock subject to awards that may be granted to any participant in any one calendar year is 2,000 . Shares of common stock issued under the LTIP may be treasury shares or authorized but unissued shares. The LTIP will be administered by the Compensation Committee of the Board, or the full Board, provided that the full Board will administer the LTIP as it relates to awards to non-employee directors of the Company. The Company filed a registration statement with the Securities and Exchange Commission on May 11, 2016 covering the offering of stock under the LTIP. The LTIP was effective on July 1, 2016 . On , the Board accelerated the vesting period for restricted stock granted in , and to retiring officer from to that officer’s retirement date which had been fully recognized as of . On May 3, 2021, the Board awarded stock to non-employee directors effective May 3, 2021. This stock award vested immediately. On May 3, 2021, the Compensation Committee awarded restricted stock to officers and key employees effective May 3, 2021. This restricted stock award vests ratably over three years beginning May 3, 2021. The restricted stock awards provide the grantee with the rights of a shareholder, including the right to receive dividends and to vote such shares, but not the right to sell or otherwise transfer the shares during the restriction period. As a result, the awards are included in common shares outstanding on the balance sheet. Restricted stock awards result in compensation expense valued at the fair market value of the stock on the date of the grant and are amortized ratably over the restriction period. The following tables summarize the stock grant amounts and activity for the nine months ended September 30, 2021. Number of Shares Grant Date Weighted Average Fair Value Nonvested at beginning of the period 6,682 $39.30 Granted 6,170 $51.40 Vested (4,048) $41.19 Forfeited – – Nonvested at end of the period 8,804 $46.91 For the three months ended September 30, 2021 and 2020, the statement of income includes $46 and $74 of stock-based compensation, respectively, and related recognized tax benefits of $13 and $21, respectively. For the nine months ended September 30, 2021 and 2020, the statement of income includes $167 and $126 of stock-based compensation, respectively, and related recognized tax benefits of $48 and $36, respectively. The total fair value of the shares vested in the nine months ended September 30, 2021 was $167. Total stock-based compensation related to nonvested awards not yet recognized is $413 which will be recognized over the remaining three year vesting period.

Income Taxes

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2021
Income Taxes [Abstract]
Income Taxes	12. Income Taxes The Company filed for a change in accounting method under the Internal Revenue Service tangible property regulations, or TPR, effective in 2014. Under the change in accounting method, the Company is permitted to deduct the costs of certain asset improvements that were previously being capitalized and depreciated for tax purposes as an expense on its income tax return. This ongoing deduction results in a reduction in the effective income tax rate, a net reduction in income tax expense, and a reduction in the amount of income taxes currently payable. It also results in increases to deferred tax liabilities and regulatory assets representing the appropriate book and tax basis difference on capital additions. The Company’s effective tax rate was and for the three months ended and , respectively, and and for the and , respectively.

Revenue (Policies)

Revenue (Policies)	9 Months Ended
Revenue (Policies)	Sep. 30, 2021
Revenue [Abstract]
Revenue	Utility Service The Company provides utility service as a distinct and single performance obligation to each of its water and wastewater customers. The transaction price is detailed in the tariff pursuant to an order by the PPUC and made publicly available. There is no variable consideration and no free service, special rates, or subnormal charges to any customer. Due to the fact that the contract includes a single performance obligation, no judgment is required to allocate the transaction price. The performance obligation is satisfied over time through the continuous provision of utility service through a stand-ready obligation to perform and the transfer of water or the collection of wastewater through a series of distinct transactions that are identical in nature and have the same pattern of transfer to the customer. The Company uses an output method to recognize the utility service revenue over time. The stand-ready obligation is recognized through the passage of time in the form of a fixed charge and the transfer of water or the collection of wastewater is recognized at a per unit rate based on the actual or estimated flow through the meter. Each customer is invoiced every month and the invoice is due within twenty days. The utility service has no returns or warranties associated with it. No revenue is recognized from performance obligations satisfied in prior periods and no performance obligations remain unsatisfied as of the end of the reporting period. A contract asset for unbilled revenue is recognized for the passage of time and the actual or estimated usage from the latest meter reading to the end of the accounting period. The methodology is standardized and consistently applied to reduce bias and the need for judgment. Billing and Revenue Collection Service The Company provides billing and revenue collection service as distinct performance obligations to three municipalities within the service territory of the Company. The municipalities provide wastewater service to their residents and the Company acts as the billing and revenue collection agent for the municipalities. The transaction price is a fixed amount per bill prepared as established in the contract. There is no variable consideration. Due to the fact that both the billing performance obligation and the revenue collection performance obligation are materially complete by the end of the reporting period, the Company does not allocate the transaction price between the two performance obligations. The performance obligations are satisfied at a point in time when the bills are sent as the municipalities receive all the benefits and bears all of the risk of non-collection at that time. Each municipality is invoiced when the bills are complete and the invoice is due within thirty days. The billing and revenue collection service has no returns or warranties associated with it. No revenue is recognized from performance obligations satisfied in prior periods and no performance obligations remain unsatisfied as of the end of the reporting period. Collection Service The Company provides collection service as a distinct and single performance obligation to several municipalities within the service territory of the Company. The municipalities provide wastewater service to their residents. If those residents are delinquent in paying for their wastewater service, the municipalities request that the Company post for and shut off the supply of water to the premises of those residents. When the resident is no longer delinquent, the Company will restore water service to the premises. The transaction price for each posting, each shut off, and each restoration is a fixed amount as established in the contract. There is no variable consideration. Due to the fact that the contract includes a single performance obligation, no judgment is required to allocate the transaction price. The performance obligation is satisfied at a point in time when the posting, shut off, or restoration is completed as the municipalities receive all the benefits in the form of payment or no longer providing wastewater service. Each municipality is invoiced periodically for the posting, shut offs, and restorations that have been completed since the last billing and the invoice is due within thirty days. The collection service has no returns or warranties associated with it. No revenue is recognized from performance obligations satisfied in prior periods and no performance obligations remain unsatisfied as of the end of the reporting period. A contract asset for unbilled revenue is recognized for postings, shut offs, and restorations that have been completed from the last billing to the end of the accounting period. Service Line Protection Plan The Company provides service line protection as a distinct and single performance obligation to current water customers that choose to participate. The transaction price is detailed in the plan’s terms and conditions and made publicly available. There is no variable consideration. Due to the fact that the contract includes a single performance obligation, no judgment is required to allocate the transaction price. The performance obligation is satisfied over time through the continuous provision of service line protection through a stand-ready obligation to perform. The Company uses an output method to recognize the service line protection revenue over time. The stand-ready obligation is recognized through the passage of time. A customer has a choice to prepay for an entire year or to pay in advance each month. The service line protection plan has no returns or extended warranties associated with it. No revenue is recognized from performance obligations satisfied in prior periods and no material performance obligations remain unsatisfied as of the end of the reporting period.

Accounts Receivable and Contr_2

Accounts Receivable and Contract Assets (Tables)	9 Months Ended
Accounts Receivable and Contract Assets (Tables)	Sep. 30, 2021
Accounts Receivable and Contract Assets [Abstract]
Accounts Receivable and Contract Assets	Accounts receivable and contract assets are summarized in the following table: As of Sep. 30, 2021 As of Dec. 31, 2020 Change Accounts receivable – customers $ 4,716 $ 5,633 $ (917 ) Other receivables 75 206 (131 ) 4,791 5,839 (1,048 ) Less: allowance for doubtful accounts (856 ) (655 ) (201 ) Accounts receivable, net $ 3,935 $ 5,184 $ (1,249 ) Unbilled revenue $ 3,047 $ 2,847 $ 200

Common Stock and Earnings Per_2

Common Stock and Earnings Per Share (Tables)	9 Months Ended
Common Stock and Earnings Per Share (Tables)	Sep. 30, 2021
Common Stock and Earnings Per Share [Abstract]
Shares Used in Computing Basic and Diluted Earnings per Share	The following table summarizes the shares used in computing basic and diluted earnings per share: Three Months Ended September 30 Nine Months Ended September 30 2021 2020 2021 2020 Weighted average common shares, basic 13,083,762 13,032,389 13,069,582 13,021,398 Effect of dilutive securities: Employee stock-based compensation 563 1,164 347 565 Weighted average common shares, diluted 13,084,325 13,033,553 13,069,929 13,021,963

Debt (Tables)

Debt (Tables)	9 Months Ended
Debt (Tables)	Sep. 30, 2021
Debt [Abstract]
Debt	As of Sep. 30, 2021 As of Dec. 31, 2020 8.43 $ 7,500 $ 7,500 Variable Rate Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series 2008A, due 2029 12,000 12,000 3.00 10,500 10,500 3.10 14,870 14,870 3.23 15,000 15,000 4.00 4.50 10,000 10,000 4.54 20,000 20,000 3.24% Senior Notes, due 2050 30,000 30,000 Committed Line of Credit, due September 2023 15,192 6,700 Total long-term debt 135,062 126,570 Less discount on issuance of long-term debt (172 ) (181 ) Less unamortized debt issuance costs (2,693 ) (2,816 ) Long-term portion $ 132,197 $ 123,573

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
Fair Value of Financial Instruments (Tables)	Sep. 30, 2021
Fair Value of Financial Instruments [Abstract]
Fair Value of Interest Rate Swap	The Company has recorded its interest rate swap liability at fair value in accordance with the standards. The liability is recorded under the caption “Other deferred credits” on the balance sheet. The table below illustrates the fair value of the interest rate swap as of the end of the reporting period. Description September 30, 2021 Fair Value Measurements at Reporting Date Using Significant Other Observable Inputs (Level 2) Interest Rate Swap $2,203 $2,203 Fair values are measured as the present value of all expected future cash flows based on the LIBOR-based swap yield curve as of the date of the valuation. These inputs to this calculation are deemed to be Level 2 inputs. The balance sheet carrying value reflects the Company's credit quality as of September 30, 2021. The rate used in discounting all prospective cash flows anticipated to be made under this swap reflects a representation of the yield to maturity for 30-year debt on utilities rated A- as of September 30, 2021. The use of the Company's credit rating resulted in a reduction in the fair value of the swap liability of $29 as of September 30, 2021. The fair value of the swap reflecting the Company's credit quality as of December 31, 2020 is shown in the table below. Description December 31, 2020 Fair Value Measurements at Reporting Date Using Significant Other Observable Inputs (Level 2) Interest Rate Swap $2,731 $2,731

Revenue (Tables)

Revenue (Tables)	9 Months Ended
Revenue (Tables)	Sep. 30, 2021
Revenue [Abstract]
Revenues Disaggregated by Service and Customer Type	The following table shows the Company’s revenues disaggregated by service and customer type. Three Months Ended September 30 Nine Months Ended September 30 2021 2020 2021 2020 Water utility service Residential $ 8,872 $ 8,902 $ 25,560 $ 25,643 Commercial and industrial 3,952 3,774 10,891 10,331 Fire protection 827 795 2,428 2,379 Wastewater utility service Residential 481 446 1,426 1,281 Commercial and industrial 79 78 237 229 Billing and revenue collection services 121 118 360 147 Collection services 18 – 29 14 Other revenue 18 4 38 14 Total Revenue from Contracts with Customers 14,368 14,117 40,969 40,038 Rents from regulated property 135 140 416 416 Total Operating Revenue $ 14,503 $ 14,257 $ 41,385 $ 40,454

Pensions (Tables)

Pensions (Tables)	9 Months Ended
Pensions (Tables)	Sep. 30, 2021
Pensions [Abstract]
Components of Net Periodic Pension Cost	Components of Net Periodic Pension Cost Three Months Ended September 30 Nine Months Ended September 30 2021 2020 2021 2020 Service cost $ 271 $ 234 $ 814 $ 703 Interest cost 302 365 906 1,093 Expected return on plan assets (913 ) (800 ) (2,739 ) (2,399 ) Amortization of actuarial loss 121 92 363 277 Amortization of prior service cost (3 ) (3 ) (9 ) (9 ) Rate-regulated adjustment 797 687 2,390 2,060 Net periodic pension expense $ 575 $ 575 $ 1,725 $ 1,725

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
Stock-Based Compensation (Tables)	Sep. 30, 2021
Stock-Based Compensation [Abstract]
Restricted Stock	The following tables summarize the stock grant amounts and activity for the nine months ended September 30, 2021. Number of Shares Grant Date Weighted Average Fair Value Nonvested at beginning of the period 6,682 $39.30 Granted 6,170 $51.40 Vested (4,048) $41.19 Forfeited – – Nonvested at end of the period 8,804 $46.91

Accounts Receivable and Contr_3

Accounts Receivable and Contract Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Accounts Receivable and Contract Assets [Abstract]
Accounts receivable - customers	$ 4,716	$ 5,633
Other receivables	75	206
Accounts receivable	4,791	5,839
Less: allowance for doubtful accounts	(856)	(655)
Accounts receivable, net	3,935	5,184
Unbilled revenue	3,047	$ 2,847
Change in accounts receivable - customers	(917)
Change in other receivables	(131)
Change in accounts receivable	(1,048)
Change in allowance for doubtful accounts	(201)
Change in accounts receivable, net	(1,249)
Change in unbilled revenue	$ 200

Common Stock and Earnings Per_3

Common Stock and Earnings Per Share (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Mar. 11, 2013
Common Stock and Earnings Per Share [Abstract]
Net income	$ 4,794	$ 4,704	$ 12,983	$ 12,888
Shares Used in Computing Basic and Diluted Earnings per Share [Abstract]
Weighted average common shares, basic (in shares)	13,083,762	13,032,389	13,069,582	13,021,398
Effect of dilutive securities [Abstract]
Employee stock-based compensation (in shares)	563	1,164	347	565
Weighted average common shares, diluted (in shares)	13,084,325	13,033,553	13,069,929	13,021,963
Stock Repurchase Program [Abstract]
Number of shares authorized to be repurchased under the stock repurchase program (in shares)					1,200,000
Number of shares repurchased under the stock repurchase program (in shares)	0	0	0	0
Number of remaining shares authorized to be repurchased under the stock repurchase program (in shares)	618,004		618,004

Debt (Details)

Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt [Abstract]
Total long-term debt	$ 135,062	$ 126,570
Less discount on issuance of long-term debt	(172)	(181)
Less unamortized debt issuance costs	(2,693)	(2,816)
Long-term portion	132,197	123,573
8.43% Senior Notes, Series D, due 2022 [Member]
Debt [Abstract]
Total long-term debt	$ 7,500	7,500
Interest rate	8.43%
Variable Rate Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series 2008A, due 2029 [Member]
Debt [Abstract]
Total long-term debt	$ 12,000	12,000
3.00% Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series A of 2019, due 2036 [Member]
Debt [Abstract]
Total long-term debt	$ 10,500	10,500
Interest rate	3.00%
3.10% Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series B of 2019, due 2038 [Member]
Debt [Abstract]
Total long-term debt	$ 14,870	14,870
Interest rate	3.10%
3.23% Senior Notes, due 2040 [Member]
Debt [Abstract]
Total long-term debt	$ 15,000	15,000
Interest rate	3.23%
4.00% - 4.50% York County Industrial Development Authority Exempt Facilities Revenue Bonds, Series 2015, due 2029 - 2045 [Member]
Debt [Abstract]
Total long-term debt	$ 10,000	10,000
4.00% - 4.50% York County Industrial Development Authority Exempt Facilities Revenue Bonds, Series 2015, due 2029 - 2045 [Member] \| Minimum [Member]
Debt [Abstract]
Interest rate	4.00%
4.00% - 4.50% York County Industrial Development Authority Exempt Facilities Revenue Bonds, Series 2015, due 2029 - 2045 [Member] \| Maximum [Member]
Debt [Abstract]
Interest rate	4.50%
4.54% Senior Notes, due 2049 [Member]
Debt [Abstract]
Total long-term debt	$ 20,000	20,000
Interest rate	4.54%
3.24% Senior Notes, due 2050 [Member]
Debt [Abstract]
Total long-term debt	$ 30,000	30,000
Interest rate	3.24%
Committed Line of Credit, due September 2023 [Member]
Debt [Abstract]
Total long-term debt	$ 15,192	$ 6,700

Interest Rate Swap Agreement (D

Interest Rate Swap Agreement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Interest Rate Swap Agreement [Abstract]
Total long-term debt	$ 135,062		$ 135,062		$ 126,570
Interest Rate Swap [Member]
Interest Rate Swap Agreement [Abstract]
Notional amount of swap	$ 12,000		$ 12,000
Fixed interest rate	3.16%		3.16%
Net payment rate on swap	3.13%	3.08%	3.06%	2.76%
Interest rate swap settlements reclassified from regulatory assets to interest expense	$ 94	$ 93	$ 278	$ 249
Overall interest rate swap (gain) loss	(31)	$ 10	(250)	$ 911
Interest rate swap settlements to be reclassified during the next 12 months	371		371
Potential payment to counterparty	$ 2,232		$ 2,232
LIBOR [Member] \| Interest Rate Swap [Member]
Interest Rate Swap Agreement [Abstract]
Percentage of variable interest rate	59.00%		59.00%
Term of variable rate			1 month
Variable Rate Pennsylvania Economic Development Financing Authority Exempt Facilities Revenue Refunding Bonds, Series 2008A, due 2029 [Member]
Interest Rate Swap Agreement [Abstract]
Total long-term debt	$ 12,000		$ 12,000		$ 12,000

Fair Value of Financial Instr_3

Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Interest Rate Swap [Abstract]
Term of debt on utilities rated A- used to discount prospective cash flows	30 years
Reduction in fair value of swap liability	$ 29
Fair Value Measurements [Abstract]
Customers' advances for construction	11,358	$ 10,326
Note receivable	255	255
Fair Value on a Recurring Basis [Member]
Interest Rate Swap [Abstract]
Interest rate swap	2,203	2,731
Fair Value on a Recurring Basis [Member] \| Fair Value Measurements at Reporting Date Using Significant Other Observable Inputs (Level 2) [Member]
Interest Rate Swap [Abstract]
Interest rate swap	2,203	2,731
Carrying Amount [Member]
Fair Value, Financial Liabilities [Abstract]
Total long-term debt	135,062	126,570
Estimated Fair Value [Member]
Fair Value, Financial Liabilities [Abstract]
Total long-term debt	$ 150,000	$ 151,000

Commitments (Details)

Commitments (Details) $ in Thousands	9 Months Ended
Commitments (Details) $ in Thousands	Sep. 30, 2021USD ($)ServiceLine	Dec. 31, 2020USD ($)
Company-Owned Lead Service Lines [Member]
Commitments [Abstract]
Term to replace all remaining company-owned lead service lines	4 years
Customer-Owned Lead Service Lines [Member]
Commitments [Abstract]
Number of lead customer-owned service lines to be replaced annually \| ServiceLine	400
Term of tariff modification to replace customer-owned lead service lines	9 years
Recovery period of regulatory asset	4 years
Costs incurred to replace customer-owned lead service lines	$ 1,307	$ 1,204
Costs to be incurred to replace customer-owned lead service lines	$ 1,500

Revenue (Details)

Revenue (Details) $ in Thousands	3 Months Ended		9 Months Ended
Revenue (Details) $ in Thousands	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)Municipality	Sep. 30, 2020USD ($)
Revenue [Abstract]
Revenue from contracts with customers	$ 14,368	$ 14,117	$ 40,969	$ 40,038
Rents from regulated property	135	140	416	416
Total operating revenue	14,503	14,257	$ 41,385	40,454
Utility Service [Member]
Revenue [Abstract]
Number of days for customer to make payment after being invoiced			20 days
Water Utility Service [Member] \| Residential [Member]
Revenue [Abstract]
Revenue from contracts with customers	8,872	8,902	$ 25,560	25,643
Water Utility Service [Member] \| Commercial and Industrial [Member]
Revenue [Abstract]
Revenue from contracts with customers	3,952	3,774	10,891	10,331
Water Utility Service [Member] \| Fire Protection [Member]
Revenue [Abstract]
Revenue from contracts with customers	827	795	2,428	2,379
Wastewater Utility Service [Member] \| Residential [Member]
Revenue [Abstract]
Revenue from contracts with customers	481	446	1,426	1,281
Wastewater Utility Service [Member] \| Commercial and Industrial [Member]
Revenue [Abstract]
Revenue from contracts with customers	79	78	237	229
Billing and Revenue Collection Services [Member]
Revenue [Abstract]
Revenue from contracts with customers	121	118	$ 360	147
Number of municipalities within the service territory provided service \| Municipality			3
Number of days for customer to make payment after being invoiced			30 days
Collection Services [Member]
Revenue [Abstract]
Revenue from contracts with customers	18	0	$ 29	14
Number of days for customer to make payment after being invoiced			30 days
Other Revenue [Member]
Revenue [Abstract]
Revenue from contracts with customers	$ 18	$ 4	$ 38	$ 14

Rate Matters (Details)

Rate Matters (Details) - DSIC [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Rate Matters [Abstract]
Distribution system improvement charge revenue	$ 255	$ 0	$ 280	$ 0
PPUC [Member] \| Maximum [Member]
Rate Matters [Abstract]
Distribution system improvement charge percentage over base rate			5.00%
PPUC [Member] \| Minimum [Member]
Rate Matters [Abstract]
Distribution system improvement charge percentage over base rate			0.00%

Pensions (Details)

Pensions (Details) - Pension Plans [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Components of Net Periodic Pension Cost [Abstract]
Service cost	$ 271	$ 234	$ 814	$ 703
Interest cost	302	365	906	1,093
Expected return on plan assets	(913)	(800)	(2,739)	(2,399)
Amortization of actuarial loss	121	92	363	277
Amortization of prior service cost	(3)	(3)	(9)	(9)
Rate-regulated adjustment	797	687	2,390	2,060
Net periodic pension expense	575	$ 575	1,725	$ 1,725
Employer Contributions [Abstract]
Estimated employer contributions in 2021					$ 2,300
Contributions made by employer			1,725
Estimated future contributions in 2021	$ 575		$ 575

Stock-Based Compensation (Detai

Stock-Based Compensation (Details) $ / shares in Units, $ in Thousands	Aug. 19, 2019Officer	Sep. 30, 2021USD ($)$ / sharesshares	Sep. 30, 2020USD ($)	Sep. 30, 2021USD ($)$ / sharesshares	Sep. 30, 2020USD ($)	May 02, 2016shares
Officer Retiring in 2020 [Member]
Stock-Based Compensation [Abstract]
Number of retiring officers receiving accelerated vesting period \| Officer	1
LTIP [Member]
Stock-Based Compensation [Abstract]
Maximum number of shares of common stock that can be issued under the plan (in shares)						100,000
Term of plan				10 years
Maximum number of shares of common stock subject to awards that may be granted to a participant per calendar year (in shares)				2,000
Restricted Stock [Member] \| LTIP [Member]
Number of Shares [Roll Forward]
Nonvested at beginning of the period (in shares)				6,682
Granted (in shares)				6,170
Vested (in shares)				(4,048)
Forfeited (in shares)				0
Nonvested at end of the period (in shares)		8,804		8,804
Grant Date Weighted Average Fair Value [Abstract]
Nonvested at beginning of the period (in dollars per share) \| $ / shares				$ 39.30
Granted (in dollars per share) \| $ / shares				51.40
Vested (in dollars per share) \| $ / shares				41.19
Forfeited (in dollars per share) \| $ / shares				0
Nonvested at end of the period (in dollars per share) \| $ / shares		$ 46.91		$ 46.91
Stock-Based Compensation Expense [Abstract]
Stock-based compensation expense \| $		$ 46	$ 74	$ 167	$ 126
Recognized tax benefits related to stock-based compensation expense \| $		13	$ 21	48	$ 36
Fair value of vested shares \| $				167
Stock-based compensation expense not yet recognized \| $		$ 413		$ 413
Period of recognition				3 years
Restricted Stock [Member] \| LTIP [Member] \| Officer Retiring in 2020 [Member]
Stock-Based Compensation [Abstract]
Vesting period				3 years
Restricted Stock [Member] \| LTIP [Member] \| Officers and Key Employees [Member]
Stock-Based Compensation [Abstract]
Vesting period				3 years

Income Taxes (Details)

Income Taxes (Details)	3 Months Ended		9 Months Ended
Income Taxes (Details)	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Taxes [Abstract]
Effective tax rate	11.50%	16.00%	7.70%	13.90%