NACCO Industries (NC) 10-K2 Mar 222021 FY Annual reportFinancial data

Company Profile

Cover Page

Cover Page - USD ($)	12 Months Ended
Cover Page - USD ($)	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
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	1-9172
Entity Registrant Name	NACCO INDUSTRIES, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	34-1505819
Entity Address, Address Line One	5875 Landerbrook Drive,
Entity Address, Address Line Two	Suite 220
Entity Address, City or Town	Cleveland,
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	44124-4069
City Area Code	440
Local Phone Number	229-5151
Title of 12(b) Security	Class A Common Stock, $1 par value per share
Trading Symbol	NC
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 109,032,630
Documents Incorporated by Reference	Portions of the Company's Proxy Statement for its 2022 annual meeting of stockholders are incorporated herein by reference in Part III of this Form 10-K.
Entity Central Index Key	0000789933
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false
Shares Outstanding Class A
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		5,616,768
Shares Outstanding Class B
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		1,566,413

Audit Information

Audit Information	12 Months Ended
Audit Information	Dec. 31, 2021
Auditor Information [Abstract]
Auditor Firm ID	42
Auditor Name	Ernst & Young LLP
Auditor Location	Cleveland, Ohio

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Revenues	$ 191,846	$ 128,432
Cost of sales	148,394	111,463
Gross profit	43,452	16,969
Earnings of unconsolidated operations	60,843	60,203
Contract termination settlement	10,333	0
Operating expenses
Selling, general and administrative expenses	55,722	53,062
Amortization of intangible assets	3,556	2,572
Gain on sale of assets	(60)	(269)
Asset impairment charges	0	8,359
Operating expenses	59,218	63,724
Operating profit	55,410	13,448
Other (income) expense
Interest expense	1,719	1,354
Interest income	(449)	(1,200)
Closed mine obligations	1,297	1,641
Gain on equity securities	(3,423)	(1,226)
Other, net	(584)	(1,379)
Other (income) expense	(1,440)	(810)
Loss before income taxes	56,850	14,258
Income tax provision (benefit)	8,725	(535)
Net income	$ 48,125	$ 14,793
Earnings per share:
Basic earnings per share (USD per share)	$ 6.73	$ 2.11
Diluted earnings per share (USD per share)	$ 6.69	$ 2.10
Basic weighted average shares outstanding (in shares)	7,146	7,026
Diluted weighted average shares outstanding (in shares)	7,190	7,057

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 48,125	$ 14,793
Other comprehensive income
Current period pension and postretirement plan adjustment, net of $864 tax expense and $213 tax benefit in 2021 and 2020, respectively	2,851	(697)
Reclassification of pension and postretirement adjustments into earnings, net of $170 and $129 tax benefit in 2021 and 2020, respectively	572	435
Total other comprehensive income	3,423	(262)
Comprehensive income	$ 51,548	$ 14,531

CONSOLIDATED STATEMENTS OF CO_2

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Current period pension and postretirement plan adjustment, tax (benefit) expense	$ 864	$ (213)
Reclassification of pension and post retirement adjustments into earnings, tax benefit	$ 170	$ 129

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 86,005	$ 88,450
Trade accounts receivable	25,667	18,894
Accounts receivable from affiliates	5,605	4,764
Inventories	54,085	47,551
Refundable federal income taxes	15,054	17,615
Prepaid insurance	2,016	2,564
Other current assets	14,621	8,308
Total current assets	203,053	188,146
Property, plant and equipment, net	193,167	172,417
Intangibles, net	31,774	35,330
Investment in unconsolidated subsidiaries	19,090	28,978
Operating lease right-of-use assets	8,911	10,324
Other non-current assets	51,225	40,984
Total assets	507,220	476,179
Current liabilities
Accounts payable	12,208	5,522
Accounts payable to affiliates	741	125
Revolving credit agreements	0	20,000
Current portion of borrowings outstanding	2,527	2,112
Asset retirement obligations	1,820	1,844
Accrued payroll	16,339	14,430
Deferred revenue	4,082	941
Other current liabilities	8,299	7,283
Total current liabilities	46,016	52,257
Long-term debt	18,183	24,353
Operating lease liabilities	9,733	11,196
Asset retirement obligations	42,131	39,888
Pension and other postretirement obligations	6,605	8,838
Deferred income taxes	14,792	17,550
Liability for uncertain tax positions	10,113	9,413
Other long-term liabilities	7,531	12,060
Total liabilities	155,104	175,555
Common stock:
Capital in excess of par value	16,331	10,895
Retained earnings	336,778	294,270
Accumulated other comprehensive loss	(8,176)	(11,599)
Total stockholders’ equity	352,116	300,624
Total liabilities and equity	507,220	476,179
Class A Common Stock
Common stock:
Common stock	5,616	5,490
Class B Common Stock
Common stock:
Common stock	$ 1,567	$ 1,568

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical)	Dec. 31, 2021$ / sharesshares	Dec. 31, 2020$ / sharesshares
Class A Common Stock
Common stock, par value (USD per share) \| $ / shares	$ 1	$ 1
Common stock, shares outstanding (in shares) \| shares	5,616,568	5,489,615
Class B Common Stock
Common stock, par value (USD per share) \| $ / shares	$ 1	$ 1
Common stock, shares outstanding (in shares) \| shares	1,566,613	1,568,210
Common stock, convertible conversion ratio	1	1

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating Activities
Net income	$ 48,125	$ 14,793
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	23,085	18,114
Amortization of deferred financing fees	326	334
Deferred income taxes	(3,553)	7,517
Stock-based compensation	5,561	3,078
Gain on sale of assets	(60)	(269)
Inventory impairment charge	0	1,973
Other asset impairment charges	0	8,359
Other	1,647	(3,786)
Working capital changes:
Affiliates receivable/payable	495	20
Accounts receivable	(13,685)	42
Inventories	(6,534)	(9,361)
Other current assets	3,320	(2,582)
Accounts payable	7,445	(10,622)
Income taxes receivable/payable	2,699	(10,790)
Other current liabilities	6,004	(19,306)
Net cash provided by (used for) operating activities	74,875	(2,486)
Investing Activities
Expenditures for property, plant and equipment	(39,230)	(30,187)
Acquisition of mineral interests	(5,331)	(14,181)
Proceeds from the sale of assets	633	571
Purchase of equity securities	0	(2,000)
Other	(219)	(187)
Net cash used for investing activities	(44,147)	(45,984)
Financing Activities
Net (reductions) additions to revolving credit agreement	(26,000)	14,000
Additions to long-term debt	3,634	7,427
Reductions to long-term debt	(3,435)	(1,354)
Cash dividends paid	(5,617)	(5,375)
Purchase of treasury shares	0	(1,002)
Other	(1,755)	332
Net cash (used for) provided by financing activities	(33,173)	14,028
Cash and Cash Equivalents
Total decrease for the year	(2,445)	(34,442)
Balance at the beginning of the year	88,450	122,892
Balance at the end of the year	$ 86,005	$ 88,450

CONSOLIDATED STATEMENTS OF EQUI

CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common StockClass A Common Stock	Common StockClass B Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive (Loss) Income
Balance, beginning of period at Dec. 31, 2019	$ 289,392	$ 5,397	$ 1,569	$ 8,911	$ 284,852	$ (11,337)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	3,078	124		2,954
Conversion of Class B to Class A shares	0	1	(1)
Purchase of treasury shares	(1,002)	(32)		(970)
Net income	14,793				14,793
Cash dividends on common stock	(5,375)				(5,375)
Current period other comprehensive income, net of tax	(697)					(697)
Reclassification adjustment to net income, net of tax	435					435
Balance, end of period at Dec. 31, 2020	300,624	5,490	1,568	10,895	294,270	(11,599)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	5,561	125		5,436
Conversion of Class B to Class A shares	0	1	(1)
Net income	48,125				48,125
Cash dividends on common stock	(5,617)				(5,617)
Current period other comprehensive income, net of tax	2,851					2,851
Reclassification adjustment to net income, net of tax	572					572
Balance, end of period at Dec. 31, 2021	$ 352,116	$ 5,616	$ 1,567	$ 16,331	$ 336,778	$ (8,176)

CONSOLIDATED STATEMENTS OF EQ_2

CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]
Cash dividends on Class A and Class B common stock (USD per share)	$ 0.7850	$ 0.7675

Principles of Consolidation and

Principles of Consolidation and Nature of Operations	12 Months Ended
Principles of Consolidation and Nature of Operations	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Principles of Consolidation and Nature of Operations	Principles of Consolidation and Nature of Operations The Consolidated Financial Statements include the accounts of NACCO Industries, Inc. ® (“NACCO”) and its wholly owned subsidiaries (collectively, the “Company”). NACCO brings natural resources to life by delivering aggregates, minerals, reliable fuels and environmental solutions through its robust portfolio of NACCO Natural Resources businesses. The Company operates under three business segments: Coal Mining, North American Mining ("NAMining") and Minerals Management. The Coal Mining segment operates surface coal mines for power generation companies and an activated carbon producer. The NAMining segment is a trusted mining partner for producers of aggregates, lithium and other minerals. The Minerals Management segment promotes the development of mineral interests. In addition, Mitigation Resources of North America ® ("Mitigation Resources") provides stream and wetland mitigation solutions. The Company also has items not directly attributable to a reportable segment. Intercompany accounts and transactions are eliminated in consolidation. See Note 15 to the Consolidated Financial Statements for further discussion of segment reporting. The Company’s operating segments are further described below: Coal Mining Segment The Coal Mining segment, operating as The North American Coal Corporation ® ("NACoal"), operates surface coal mines under long-term contracts with power generation companies and an activated carbon producer pursuant to a service-based business model. Coal is surface mined in North Dakota, Texas, Mississippi, Louisiana and through September 30, 2021, on the Navajo Nation in New Mexico. Each mine is fully integrated with its customer's operations. As of December 31, 2021, the Company's operating coal mines were: The Coteau Properties Company (“Coteau”), Coyote Creek Mining Company, LLC (“Coyote Creek”), Demery Resources Company, LLC (“Demery”), The Falkirk Mining Company (“Falkirk”), Mississippi Lignite Mining Company (“MLMC”) and The Sabine Mining Company (“Sabine”). The contract mining agreement between Bisti Fuels Company, LLC (“Bisti”) and its customer, Navajo Transitional Energy Company ("NTEC") was terminated effective September 30, 2021. As required under the agreement, NTEC paid the Company a termination fee of $10.3 million reported on the line Contract termination settlement on the Consolidated Statements of Operations. As of October 1, 2021, NTEC assumed control and responsibility for operation and all reclamation of the Navajo Mine. The Coteau Properties Company (“Coteau”) operates the Freedom Mine in North Dakota. All coal production from the Freedom Mine is delivered to Basin Electric Power Cooperative (“Basin Electric”). Basin Electric utilizes the coal at the Great Plains Synfuels Plant (the “Synfuels Plant”), Antelope Valley Station and Leland Olds Station. The Synfuels Plant is a coal gasification plant, owned by Dakota Gasification Company (“Dakota Gas’), a subsidiary of Basin Electric, that manufactures synthetic natural gas and produces fertilizers, solvents, phenol, carbon dioxide, and other chemical products for sale. During 2020, Basin Electric informed Coteau that it is considering changes that may result in modifications to its Synfuels Plant that could potentially reduce or eliminate coal requirements at the Synfuels Plant. During August 2021, Bakken Energy (“Bakken”) and Basin Electric signed a non-binding term sheet to transfer ownership of the assets of Dakota Gas to Bakken. Bakken stated the closing date is expected to be April 1, 2023. As part of the term sheet between Basin Electric and Bakken, Basin Electric indicated that the Synfuels Plant will continue existing operations through 2025. The closing is subject to the satisfaction of specified conditions. Basin Electric is also considering other options for the Synfuels Plant if the transaction with Bakken does not close. Basin Electric indicated that if it decides to proceed with any changes that could reduce or eliminate the use of coal, the feedstock change is not expected to occur before 2026. Falkirk operates the Falkirk Mine in North Dakota. Falkirk is the sole supplier of lignite coal to the Coal Creek Station power plant pursuant to a contract under which Falkirk also supplies approximately 0.3 million tons of lignite coal per year to Spiritwood Station power plant. Coal Creek Station and Spiritwood Station are owned by Great River Energy (“GRE”). In May 2020, GRE announced its intent to sell or retire Coal Creek Station and modify Spiritwood Station to be fueled by natural gas. During June 2021, GRE entered into an agreement to sell Coal Creek Station and the adjacent high-voltage direct current transmission line to Bismarck, North Dakota-based Rainbow Energy Center, LLC (“Rainbow Energy”) and its affiliates. The closing of this sale is subject to the satisfaction of certain conditions and presently, the transaction is expected to close during the second quarter of 2022. Falkirk meets the definition of a variable interest entity (“VIE”). The Company concluded that GRE’s May 2020 and June 2021 announcements were not reconsideration events; however, the completion of the Rainbow Energy transaction will result in a reconsideration event. As the terms of the contract between Falkirk and Rainbow Energy are substantially the same as the terms of the contract between Falkirk and GRE, Falkirk is expected to remain a VIE and Rainbow Energy will become the primary beneficiary; therefore, NACCO will continue to account for Falkirk under the equity method. Upon completion of the sale of Coal Creek Station, the existing Coal Sales Agreement, the existing Mortgage and Security Agreement and the existing Option Agreement between GRE and Falkirk will terminate. Falkirk and GRE have entered into a termination and release of claims agreement. Upon completion of the sale of Coal Creek Station, GRE will pay Falkirk $14.0 million in cash, as well as transfer ownership of an office building located in Bismarck, North Dakota, and convey membership units in Midwest AgEnergy to NACoal. NACCO currently holds a $5.0 million investment in Midwest AgEnergy, which operates two ethanol facilities in North Dakota. If GRE's efforts to sell the power plant are successful, a new Coal Sales Agreement (“CSA”) between Falkirk and Rainbow Energy will become effective and Falkirk will supply all coal requirements of Coal Creek Station concurrent with Rainbow Energy’s acquisition of the power plant. Falkirk will no longer make any coal deliveries to GRE’s Spiritwood Station. Falkirk will be paid a management fee and Rainbow Energy will be responsible for funding all mine operating costs and directly or indirectly providing all of the capital required to operate the mine. The CSA specifies that Falkirk will perform final mine reclamation, which will be funded in its entirety by Rainbow Energy. The initial production period is expected to run ten years from the effective date of the CSA, but the CSA may be extended or terminated early under certain circumstances. If Rainbow Energy terminates the CSA and closes Coal Creek Station before 2027, Falkirk will be entitled to an additional payment from GRE under the terms of the termination and release of claims agreement. The additional payment amount ranges from $8 million if the closure occurs before 2024 to $2 million if the closure occurs in 2026. To support the transfer to new ownership, Falkirk has agreed to a reduction in the current per ton management fee from the effective date of the new CSA through May 31, 2024. After May 31, 2024, the per ton management fee increases to a higher base in line with current fee levels, and thereafter adjusts annually according to an index which tracks broad measures of U.S. inflation. If GRE’s efforts to sell the power plant are not successful and GRE elects to prematurely close Coal Creek Station, the early termination of the CSA would have a material adverse effect on the Company's business, financial condition and results of operations. Sabine operates the Sabine Mine in Texas. All production from Sabine is delivered to Southwestern Electric Power Company's (“SWEPCO”) Henry W. Pirkey Plant (the “Pirkey Plant”). SWEPCO is an American Electric Power (“AEP”) company. During 2020, AEP announced its intent to retire the Pirkey Plant in 2023. SWEPCO expects deliveries from Sabine to continue until the first quarter of 2023 at which time Sabine expects to begin final reclamation. Funding for mine reclamation is the responsibility of SWEPCO. During 2020, Caddo Creek Resources Company, LLC (“Caddo Creek”) ceased all mining and delivery of lignite and commenced mine reclamation. Funding for mine reclamation is the responsibility of a subsidiary of Advanced Emissions Solutions (“AES”). Caddo Creek entered into a contract with a subsidiary of AES to perform the required mine reclamation. The reclamation at Caddo Creek is expected to be substantially complete during the first half of 2022. During 2020, the contract mining agreement between Camino Real Fuels, LLC (“Camino Real”) and its customer, Dos Republicas Coal Partnership (“DRCP”), terminated and resulted in mine closure. Funding for mine reclamation is the responsibility of DRCP. At all operating coal mines other than MLMC, the Company is paid a management fee per ton of coal or heating unit (MMBtu) delivered. Each contract specifies the indices and mechanics by which fees change over time, generally in line with broad measures of U.S. inflation. The customers are responsible for funding all mine operating costs, including final mine reclamation, and directly or indirectly provide all of the capital required to build and operate the mine. This contract structure eliminates exposure to spot coal market price fluctuations while providing income and cash flow with minimal capital investment. Other than at Coyote Creek, debt financing provided by or supported by the customers is without recourse to NACCO and NACoal. See Note 17 for further discussion of Coyote Creek's guarantees. All operating coal mines other than MLMC meet the definition of a VIE. In each case, NACCO is not the primary beneficiary of the VIE as it does not exercise financial control; therefore, NACCO does not consolidate the results of these operations within its financial statements. Instead, these contracts are accounted for as equity method investments. The income before income taxes associated with these VIEs is reported as Earnings of unconsolidated operations on the Consolidated Statements of Operations, and the Company’s investment is reported on the line Investments in Unconsolidated Subsidiaries in the Consolidated Balance Sheets. The mines that meet the definition of a VIE are referred to collectively as the “Unconsolidated Subsidiaries.” For tax purposes, the Unconsolidated Subsidiaries are included within the NACCO consolidated U.S. tax return; therefore, the income tax expense line on the Consolidated Statements of Operations includes income taxes related to these entities. See Note 17 for further information on the Unconsolidated Subsidiaries. The Company performs contemporaneous reclamation activities at each mine in the normal course of operations. Under all of the Unconsolidated Subsidiaries’ contracts, the customer has the obligation to fund final mine reclamation activities. Under certain contracts, the Unconsolidated Subsidiary holds the mine permit and is therefore responsible for final mine reclamation activities. To the extent the Unconsolidated Subsidiary performs such final reclamation, it is compensated for providing those services in addition to receiving reimbursement from customers for costs incurred. At Caddo Creek, the terms of the contract to perform mine reclamation contain a fixed-price component and therefore, Caddo Creek no longer meets the VIE criteria. As a result, Caddo Creek is consolidated within the Company's financial statements. The MLMC contract is the only operating coal contract in which the Company is responsible for all operating costs, capital requirements and final mine reclamation; therefore, MLMC is consolidated within NACCO’s financial statements. MLMC sells coal to its customer at a contractually agreed-upon price which adjusts monthly, primarily based on changes in the level of established indices which reflect general U.S. inflation rates. Profitability at MLMC is affected by customer demand for coal and changes in the indices that determine sales price and actual costs incurred. As diesel fuel is heavily weighted among the indices used to determine the coal sales price, fluctuations in diesel fuel prices can result in significant fluctuations in earnings at MLMC. NAMining Segment The NAMining segment provides value-added contract mining and other services for producers of aggregates, lithium and other minerals. The segment is a primary platform for the Company’s growth and diversification of mining activities outside of the coal industry. NAMining provides contract mining services for independently owned mines and quarries, creating value for its customers by performing the mining aspects of its customers’ operations. This allows customers to focus on their areas of expertise: materials handling and processing, product sales and distribution. NAMining historically operated primarily at limestone quarries in Florida, but is focused on expanding outside of Florida, mining materials other than limestone and expanding the scope of mining operations provided to its customers. NAMining utilizes both fixed price and management fee contract structures. Certain of the entities within the NAMining segment are VIEs and are accounted for under the equity method as Unconsolidated Subsidiaries. See Note 17 for further discussion. Minerals Management Segment The Minerals Management segment derives income primarily by leasing its royalty and mineral interests to third-party exploration and production companies, and, to a lesser extent, other mining companies, granting them the rights to explore, develop, mine, produce, market and sell gas, oil, and coal in exchange for royalty payments based on the lessees' sales of those minerals. During 2021 and 2020, the Minerals Management segment acquired mineral interests, primarily in the Eagle Ford and Permian Basins in Texas and intends to make future acquisitions of mineral and royalty interests that meet the Company’s acquisition criteria as part of its growth strategy. See Note 20 for further discussion of Mineral Management's acquisitions.

Significant Accounting Policies

Significant Accounting Policies	12 Months Ended
Significant Accounting Policies	Dec. 31, 2021
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies Use of Estimates: The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and judgments. These estimates and judgments affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities (if any) at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Cash and Cash Equivalents: Cash and cash equivalents include cash in banks and highly liquid investments with original maturities of three months or less. Inventories: Inventories are stated at the lower of cost and net realizable value. The weighted average method is used for inventory valuation. Property, Plant and Equipment, Net: Property, plant and equipment are initially recorded at cost. Depreciation, depletion and amortization are provided in amounts sufficient to amortize the cost of the assets, including assets recorded under finance leases, over their estimated useful lives using the straight-line method or the units-of-production method. Buildings and building improvements are depreciated over the life of the mine, which is generally 30 years. Estimated lives for machinery and equipment range from three Royalty Interests in Oil and Natural Gas Properties: The Company follows the successful efforts method of accounting for its royalty and mineral interests. Under this method, costs to acquire mineral and royalty interests in oil and natural gas properties are capitalized when incurred. Acquisitions of royalty interests of oil and natural gas properties are considered asset acquisitions and are recorded at cost. As an owner of mineral and royalty interests and not working interests, the Company is not required to make capital expenditures and did not make capital expenditures to convert proved undeveloped reserves from undeveloped to developed. Acquisition costs of proved royalty and mineral interests are amortized using the units of production method over the life of the property, which is estimated using proved reserves. For purposes of amortization, interests in oil and natural gas properties are grouped in a reasonable aggregation of properties with common geological structural features or stratigraphic condition. The Company reviews and evaluates its royalty interests in oil and natural gas properties for impairment when events or changes in circumstances indicate that the related carrying amounts may not be recoverable. Proved oil and gas properties are reviewed for impairment when events and circumstances indicate a potential decline in the fair value of such properties below the carrying value, such as a downward revision of the reserve estimates or lower commodity prices. When such events or changes in circumstances occur, the Company estimates the undiscounted future cash flows expected in connection with the properties and compares such future cash flows to the carrying amounts of the properties to determine if the carrying amounts are recoverable. If the carrying value of the properties is determined to not be recoverable based on the undiscounted cash flows, an impairment charge is recognized by comparing the carrying value to the estimated fair value of the properties. See Note 20 for further discussion of the Company's royalty and mineral interests. Long-Lived Assets: The Company periodically evaluates long-lived assets for impairment when changes in circumstances or the occurrence of certain events indicate the carrying amount of an asset or asset group may not be recoverable. Upon identification of indicators of impairment, the Company evaluates the carrying value of the asset by comparing the estimated future undiscounted cash flows generated from the use of the asset or asset group and its eventual disposition with the asset's net carrying value. If the carrying value of an asset is considered impaired, an impairment charge is recorded for the amount that the carrying value of the long-lived asset or asset group exceeds its fair value. Fair value is estimated as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. See Note 9 for further discussion of the Company's nonrecurring fair value measurements. At MLMC, the costs of mining operations are not reimbursed by MLMC's customer. As such, increased costs at MLMC or decreased revenues could materially reduce the Company's profitability. Any reduction in customer demand at MLMC, including reductions related to reduced mechanical availability of the customer’s power plant, would adversely affect the Company's operating results and could result in significant impairments. MLMC has approximately $136 million of long-lived assets, including property, plant and equipment and its coal supply agreement intangible asset, which are subject to periodic impairment analyses and review. Identifying and assessing whether impairment indicators exist, or if events or changes in circumstances have occurred, including assumptions about future power plant dispatch levels, changes in future sales price, operating costs and other factors that impact anticipated revenue and customer demand, requires significant judgment. Actual future operating results could differ significantly from these estimates, which may result in an impairment charge in a future period, which could have a substantial impact on the Company’s results of operations. Coal Supply Agreement: The coal supply agreement represents a long-term supply agreement with MLMC's customer and was recorded based on the fair value at the date of acquisition. The coal supply agreement is amortized based on units of production over the term of the agreement, which expires in 2032. The Company reviews identified intangible assets for impairment when changes in circumstances or the occurrence of certain events indicate potential impairment. Self-insurance Liabilities: The Company is generally self-insured for medical claims, certain workers’ compensation claims and certain closed mine liabilities. An estimated provision for claims reported and for claims incurred but not yet reported under the self-insurance programs is recorded and revised periodically based on industry trends, historical experience and management judgment. In addition, industry trends are considered within management's judgment for valuing claims. Changes in assumptions for such matters as legal judgments and settlements, inflation rates, medical costs and actual experience could cause estimates to change in the near term. Revenue Recognition: See Note 3 to the Consolidated Financial Statements for discussion of revenue recognition. Stock Compensation: The Company maintains long-term incentive programs that allow for the grant of shares of Class A common stock, subject to restrictions, as a means of retaining and rewarding selected employees for long-term performance and to increase ownership in the Company. Shares awarded under the plans are fully vested and entitle the stockholder to all rights of common stock ownership except that shares may not be assigned, pledged or otherwise transferred during the restriction period. In general, for shares awarded for years ended December 31, 2021 and December 31, 2020, the restriction period ends at the earliest of (i) three years after the participant's retirement date, (ii) three five The Company also has a stock compensation plan for non-employee directors of the Company under which a portion of the annual retainer for each non-employee director is paid in restricted shares of Class A common stock. For the year ended December 31, 2021, $105,000 ($150,000 for the Chairman) of the non-employee director's annual retainer of $167,000 ($250,000 for the Chairman) was paid in restricted shares of Class A common stock. For the year ended December 31, 2020, $100,000 ($150,000 for the Chairman) of the non-employee director's annual retainer of $162,000 ($250,000 for the Chairman) was paid in restricted shares of Class A common stock. Shares awarded under the plan are fully vested and entitle the stockholder to all rights of common stock ownership except that shares may not be assigned, pledged, hypothecated or otherwise transferred during the restriction period. In general, the restriction period ends at the earliest of (i) ten years from the award date, (ii) the date of the director's death or permanent disability, (iii) five years (or earlier with the approval of the Board of Directors) after the director's date of retirement from the Board of Directors, (iv) the date the director has both retired from the Board of Directors and has reached age 70, or (v) at such other time as determined by the Board of Directors in its sole and absolute discretion. Pursuant to this plan, the Company issued 45,223 and 42,744 shares related to the years ended December 31, 2021 and 2020, respectively. In addition to the mandatory retainer fee received in restricted stock, directors may elect to receive shares of Class A common stock in lieu of cash for up to 100% of the balance of their annual retainer, committee retainer and any committee chairman's fees. These voluntary shares are not subject to any restrictions. Total shares issued under voluntary elections were 753 in 2021 and 745 in 2020. After the issuance of these shares, there were 166,561 shares of Class A common stock available for issuance under this plan. Compensation expense related to these awards was $1.3 million ($1.1 million net of tax) and $1.0 million ($0.8 million net of tax) for the years ended December 31, 2021 and 2020, respectively. Compensation expense represents fair value based on the market price of the shares of Class A common stock at the grant date. Financial Instruments: Financial instruments held by the Company include cash and cash equivalents, accounts receivable, equity securities, accounts payable, revolving credit agreements and long-term debt. Fair Value Measurements: The Company accounts for the fair value measurement of its financial assets and liabilities in accordance with U.S. generally accepted accounting principles, which defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. A fair value hierarchy requires an entity to maximize the use of observable inputs, where available, and minimize the use of unobservable inputs when measuring fair value. Described below are the three levels of inputs that may be used to measure fair value: Level 1 - Quoted prices in active markets that are accessible at the measurement date for identical assets or liabilities. Level 2 - Observable prices that are based on inputs not quoted on active markets, but corroborated by market data. Level 3 - Unobservable inputs are used when little or no market data is available. The hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. The classification of fair value measurements within the hierarchy is based upon the lowest level of input that is significant to the measurement. See Note 9 for further discussion of fair value measurements.

Revenue Recognition

Revenue Recognition	12 Months Ended
Revenue Recognition	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition Nature of Performance Obligations At contract inception, the Company assesses the goods and services promised in its contracts with customers and identifies a performance obligation for each promised good or service that is distinct. To identify the performance obligations, the Company considers all of the goods or services promised in the contract regardless of whether they are explicitly stated or are implied by customary business practices. Each mine or mine area has a contract with its respective customer that represents a contract under ASC 606. For its consolidated entities, the Company’s performance obligations vary by contract and consist of the following: At MLMC, each MMBtu delivered during the production period is considered a separate performance obligation. Revenue is recognized at the point in time that control of each MMBtu of lignite transfers to the customer. Fluctuations in revenue from period to period generally result from changes in customer demand. During 2020, Caddo Creek entered into a fixed-price contract to perform mine reclamation. The management service to perform mine reclamation is the performance obligation accounted for as a series. Performance momentarily creates an asset that the customer simultaneously receives and consumes; therefore, control is transferred to the customer over time. Revenue from this contract is recognized over time utilizing the cost-to-cost method to measure the extent of progress toward completion of the performance obligation. The Company believes the cost-to-cost method is the most appropriate method to measure progress and that the rate at which costs are incurred to fulfill the contract best depicts the transfer of control to the customer. The extent of progress towards completion is measured based on the ratio of costs incurred to date compared to total estimated costs at completion, and revenue is recorded proportionally based on an estimated profit margin. At NAMining, the management service to oversee the operation of the equipment and delivery of aggregates or other minerals is the performance obligation accounted for as a series. Performance momentarily creates an asset that the customer simultaneously receives and consumes; therefore, control is transferred to the customer over time. Consistent with the conclusion that the customer simultaneously receives and consumes the benefits provided, an input-based measure of progress is appropriate. As each month of service is completed, revenue is recognized for the amount of actual costs incurred, plus the management fee or fixed fee and the general and administrative fee (as applicable). Fluctuations in revenue from period to period result from changes in customer demand primarily due to increases and decreases in activity levels on individual contracts and variances in reimbursable costs. The Minerals Management segment enters into contracts which grant the right to explore, develop, produce and sell minerals controlled by the Company. These arrangements result in the transfer of mineral rights for a period of time; however, no rights to the actual land are granted other than access for purposes of exploration, development, production and sales. The mineral rights revert back to the Company at the expiration of the contract. Under these contracts, granting exclusive right, title, and interest in and to minerals, if any, is the performance obligation. The performance obligation under these contracts represents a series of distinct goods or services whereby each day of access that is provided is distinct. The transaction price consists of a variable sales-based royalty and, in certain arrangements, a fixed component in the form of an up-front lease bonus payment. As the amount of consideration the Company will ultimately be entitled to is entirely susceptible to factors outside its control, the entire amount of variable consideration is constrained at contract inception. The Company believes that the pricing provisions of royalty contracts are customary in the industry. Up- front lease bonus payments represent the fixed portion of the transaction price and are recognized over the primary term of the contract, which is generally five years. Significant Judgments The Company’s contracts with its customers contain different types of variable consideration including, but not limited to, management fees that adjust based on volumes or MMBtu delivered, however, the terms of these variable payments relate specifically to the Company's efforts to satisfy one or more, but not all of, the performance obligations (or to a specific outcome from satisfying the performance obligations) in the contract. Therefore, the Company allocates each variable payment (and subsequent changes to that payment) entirely to the specific performance obligation to which it relates. Management fees, as well as general and administrative fees, are also adjusted based on changes in specified indices (e.g., CPI) to compensate for general inflation changes. Index adjustments, if applicable, are effective prospectively. Recognition of revenue and recognition of profit related to the Caddo Creek contract requires the use of assumptions and estimates related to the total contract value, the total cost at completion, and the measurement of progress towards completion of the performance obligation. Due to the nature of the contract, developing the estimated total contract value and total cost at completion requires the use of significant judgment. The total contract value includes variable consideration. The Company includes variable consideration in the transaction price at the most likely amount to be earned, based upon the Company’s assessment of expected performance. The Company records these amounts only to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is resolved. Cost Reimbursement Certain contracts include reimbursement from customers of actual costs incurred for the purchase of supplies, equipment and services in accordance with contractual terms. Such reimbursable revenue is variable and subject to uncertainty, as the amounts received and timing thereof is highly dependent on factors outside of the Company’s control. Accordingly, reimbursable revenue is fully constrained and not recognized until the uncertainty is resolved, which typically occurs when the related costs are incurred on behalf of a customer. The Company is considered a principal in such transactions and records the associated revenue at the gross amount billed to the customer with the related costs recorded as an expense within cost of sales. Prior Period Performance Obligations The Company records royalty income in the month production is delivered to the purchaser. As a non-operator, the Company has limited visibility into when new wells start producing and production statements may not be received for 30 to 90 days or more after the date production is delivered. As a result, the Company is required to estimate the amount of production delivered to the purchaser of the product and the price that will be received for the sale of the product. The expected sales volumes and prices for these properties are estimated and recorded in "Trade accounts receivable" in the accompanying Consolidated Balance Sheets. The difference between the Company’s estimates and the actual amounts received is recorded in the month that payment is received from the third-party lessee. During 2021, the Company recognized $1.8 million of variable consideration that was previously constrained due to uncertainty of collectability. During 2020, royalty income recognized in the reporting period related to performance obligations satisfied in prior reporting periods was immaterial. Disaggregation of Revenue In accordance with ASC 606-10-50, the Company disaggregates revenue from contracts with customers into major goods and service lines and timing of transfer of goods and services. The Company determined that disaggregating revenue into these categories achieves the disclosure objective of depicting how the nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factors. The Company’s business consists of the Coal Mining, NAMining and Minerals Management segments as well as Unallocated Items. See Note 15 to the Consolidated Financial Statements for further discussion of segment reporting. The following table disaggregates revenue by major sources for the years ended December 31: Major Goods/Service Lines 2021 2020 Coal Mining $ 91,851 $ 72,088 NAMining 69,924 42,392 Minerals Management 31,003 14,721 Unallocated Items 4,695 2,133 Eliminations (5,627) (2,902) Total revenues $ 191,846 $ 128,432 Timing of Revenue Recognition Goods transferred at a point in time $ 80,515 $ 68,073 Services transferred over time 111,331 60,359 Total revenues $ 191,846 $ 128,432 Contract Balances The opening and closing balances of the Company’s current and long-term contract liabilities and receivables are as follows: Contract balances Trade accounts receivable Contract asset Contract liability (current) Contract liability (long-term) Balance at January 1, 2021 $ 18,894 $ 4,984 $ 941 $ 3,626 Balance at December 31, 2021 25,667 5,985 4,082 488 Increase (decrease) $ 6,773 $ 1,001 $ 3,141 $ (3,138) As described above, the Company enters into royalty contracts that grant exclusive right, title, and interest in and to minerals. The transaction price consists of a variable sales-based royalty and, in certain arrangements, a fixed component in the form of an up-front lease bonus payment. The timing of the payment of the fixed portion of the transaction price is upfront, however, the performance obligation is satisfied over the primary term of the contract, which is generally five years. Therefore, at the time any such up-front payment is received, a contract liability is recorded which represents deferred revenue. The difference between the opening and closing balance of this contract liability, which is shown above, primarily results from the difference between new lease bonus payments received and amortization of up-front lease bonus payments received in previous periods. The amount of revenue recognized in the years ended December 31, 2021 and December 31, 2020 that was included in the opening contract liability was $1.4 million and $0.9 million, respectively. This revenue consists of up-front lease bonus payments received under royalty contracts that are recognized over the primary term of the royalty contracts, which are generally five years. The Company expects to recognize $4.1 million in 2022, $0.3 million in 2023, $0.1 million in 2024, and de minimis amounts in 2025 and 2026 related to the contract liability remaining at December 31, 2021. The difference between the opening and closing balances of the Company’s contract balances results from the timing difference between the Company’s performance and the customer’s payment. The Company has no contract assets recognized from the costs to obtain or fulfill a contract with a customer.

Inventories

Inventories	12 Months Ended
Inventories	Dec. 31, 2021
Inventory Disclosure [Abstract]
Inventories	Inventories Inventories are summarized as follows: December 31 2021 2020 Coal $ 19,352 $ 17,695 Mining supplies 34,733 29,856 Total inventories $ 54,085 $ 47,551

Property, Plant and Equipment,

Property, Plant and Equipment, Net	12 Months Ended
Property, Plant and Equipment, Net	Dec. 31, 2021
Property, Plant and Equipment, Net [Abstract]
Property, Plant and Equipment, Net	Property, Plant and Equipment, Net Property, plant and equipment, net includes the following: December 31 2021 2020 Coal lands and real estate $ 52,011 $ 50,887 Mineral interests 19,512 14,181 Plant and equipment 264,110 231,190 Property, plant and equipment, at cost 335,633 296,258 Less allowances for depreciation, depletion and amortization 142,466 123,841 $ 193,167 $ 172,417

Intangible Assets

Intangible Assets	12 Months Ended
Intangible Assets	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets The Company has a coal supply agreement intangible asset which is subject to amortization based on units of production over the term of the lignite sales agreement which expires in 2032. The gross and net balances are set forth in the following table: Gross Carrying Accumulated Net Balance at December 31, 2021 Coal supply agreement $ 84,200 $ (52,426) $ 31,774 Balance at December 31, 2020 Coal supply agreement $ 84,200 $ (48,870) $ 35,330 Amortization expense for intangible assets was $3.6 million and $2.6 million in 2021 and 2020, respectively.

Asset Retirement Obligations

Asset Retirement Obligations	12 Months Ended
Asset Retirement Obligations	Dec. 31, 2021
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligations	Asset Retirement Obligations The Company’s obligations associated with the retirement of long-lived assets are recognized at fair value at the time the legal obligations are incurred. Upon initial recognition of a liability, a corresponding amount is capitalized as part of the carrying value of the related long-lived asset and is depreciated either by the straight-line method or the units-of-production method. The liability is accreted each period until the liability is settled, at which time the liability is removed. If the liability is settled for an amount other than the recorded amount, a gain or loss is recognized. The Company's asset retirement obligations are principally for costs to close its surface mines and reclaim the land it has disturbed as a result of its normal mining activities as well as for costs to dismantle certain mining equipment at the end of the life of the mine. Management’s estimate involves a high degree of subjectivity. In particular, the obligation’s fair value is determined using a discounted cash flow technique and is based upon mining permit requirements and various assumptions including credit adjusted risk-free-rates, estimates of disturbed acreage, life of the mine, estimated reclamation costs, the application of various environmental laws and regulation and assumptions regarding equipment productivity. The Company reviews its asset retirement obligations at each mine site at least annually and makes necessary adjustments for permit changes and for revisions of estimates of the timing and extent of reclamation activities and cost estimates. The accretion of the liability is being recognized over the estimated life of each individual asset retirement obligation and is recorded in the line “Cost of sales” in the accompanying Consolidated Statements of Operations. The associated asset is recorded in “Property, Plant and Equipment, net” in the accompanying Consolidated Balance Sheets. The depreciation of the asset is recorded in the line “Cost of sales” in the accompanying Consolidated Statements of Operations. A reconciliation of the Company's beginning and ending aggregate carrying amount of the asset retirement obligations are as follows: Coal Mining NAMining Unallocated Items NACCO Balance at January 1, 2020 $ 19,015 $ 604 $ 17,240 $ 36,859 Liabilities incurred during the period 9,809 — — 9,809 Liabilities settled during the period (5,977) — (732) (6,709) Accretion expense 1,793 — 1,022 2,815 Revision of estimated cash flows 400 (604) (838) (1,042) Balance at December 31, 2020 $ 25,040 $ — $ 16,692 $ 41,732 Liabilities settled during the period (184) — (869) (1,053) Accretion expense 1,996 — 1,304 3,300 Revision of estimated cash flows 46 — (74) (28) Balance at December 31, 2021 $ 26,898 $ — $ 17,053 $ 43,951 Asset retirement obligations are incurred at the time development of a new mine or mine area commences. During 2020, MLMC began development of a new mine area and as such, recorded an additional $9.8 million asset retirement obligation and a corresponding $9.8 million asset was capitalized as a component of Property, plant and equipment, net. The asset retirement obligation’s fair value was determined using a discounted cash flow technique and is based upon permit requirements and various estimates and assumptions that would be used by market participants, including estimates of disturbed acreage, reclamation costs and assumptions regarding equipment productivity. Centennial Natural Resources (“Centennial”) ceased coal production at the end of 2015. During 2020, the Company transferred the mine permits for certain Centennial mines to an unrelated third party. As a result of the transfer of the mine permits, the Company was relieved of the associated mine reclamation obligations and therefore recorded a $4.8 million reduction to Centennial's asset retirement obligation, included in "Liabilities settled during the period" in the table above. As part of the transfer of the mine permits, the Company also paid $3.8 million of cash, recorded $1.4 million in Other assets for amounts owed to Centennial from the third-party acquirer, and recognized $2.4 million in Other long-term liabilities in the Consolidated Balance Sheets. The Other long-term liabilities are primarily associated with amounts due to the third-party acquirer upon replacement of outstanding letters of credit. Bellaire Corporation (“Bellaire”) is a non-operating subsidiary of the Company with legacy liabilities relating to closed mining operations, primarily former Eastern U.S. underground coal mining operations. These legacy liabilities include obligations for water treatment and other environmental remediation that arose as part of the normal course of closing these underground mining operations. The accretion of the liability is recognized over the estimated life of the asset retirement obligation and is recorded in the line “Closed mine obligations” in the accompanying Consolidated Statements of Operations. Since Bellaire's properties are no longer active operations, no associated asset has been capitalized.

Leases

Leases	12 Months Ended
Leases	Dec. 31, 2021
Leases [Abstract]
Leases	LeasesThe Company recognizes right-of-use assets (“ROU assets”) and lease liabilities for operating leases of real estate, mining and other equipment that expire at various dates through 2031. The majority of the Company's leases are operating leases. See the table below for further information on the Consolidated Balance Sheet. The Company's lease agreements do not contain lease payments that depend on an index or a rate, as such, minimum lease payments do not include variable lease payments. Leased assets and liabilities include the following: Description Location DECEMBER 31 DECEMBER 31 Assets Operating Operating lease right-of-use assets $ 8,911 $ 10,324 Finance Property, plant and equipment, net (a) 334 1,478 Liabilities Current Operating Other current liabilities $ 1,463 $ 1,457 Finance Current maturities of long-term debt 150 1,188 Noncurrent Operating Operating lease liabilities $ 9,733 $ 11,196 Finance Long-term debt 190 280 (a) Finance leased assets are recorded net of accumulated amortization of $0.3 million and $0.2 million as of December 31, 2021 and December 31, 2020, respectively. The components of lease expense for the years ended December 31 are as follows: Description Location 2021 2020 Lease expense Operating lease cost Selling, general and administrative expenses $ 2,122 $ 2,103 Finance lease cost: Amortization of leased assets Cost of sales 220 164 Interest on lease liabilities Interest expense 31 19 Variable lease expense Selling, general and administrative expenses 571 588 Short-term lease expense Selling, general and administrative expenses 1,176 260 Total lease expense $ 4,120 $ 3,134 Future minimum finance and operating lease payments were as follows at December 31, 2021: Finance Operating Total 2022 $ 161 $ 2,181 $ 2,342 2023 127 1,705 1,832 2024 63 1,661 1,724 2025 7 1,469 1,476 2026 — 1,501 1,501 Subsequent to 2026 — 6,451 6,451 Total minimum lease payments 358 14,968 $ 15,326 Amounts representing interest 18 3,772 Present value of net minimum lease payments $ 340 $ 11,196 As most of the Company's leases do not provide an implicit rate, the Company determines the incremental borrowing rate based on the information available at the lease commencement date in determining the present value of lease payments. The Company considers its credit rating and the current economic environment in determining this collateralized rate. The assumptions used in accounting for ASC 842 for the years ended December 31 are as follows: Lease term and discount rate 2021 2020 Weighted average remaining lease term (years) Operating 8.38 8.92 Finance 2.44 1.38 Weighted average discount rate Operating 7.08 % 7.00 % Finance 4.16 % 4.11 % The following table details cash paid for amounts included in the measurement of lease liabilities for the years ended December 31: Cash paid for amounts included in the measurement of lease liabilities 2021 2020 Operating cash flows from operating leases $ 2,260 $ 2,223 Operating cash flows from finance leases 31 19 Financing cash flows from finance leases 275 623
Leases	LeasesThe Company recognizes right-of-use assets (“ROU assets”) and lease liabilities for operating leases of real estate, mining and other equipment that expire at various dates through 2031. The majority of the Company's leases are operating leases. See the table below for further information on the Consolidated Balance Sheet. The Company's lease agreements do not contain lease payments that depend on an index or a rate, as such, minimum lease payments do not include variable lease payments. Leased assets and liabilities include the following: Description Location DECEMBER 31 DECEMBER 31 Assets Operating Operating lease right-of-use assets $ 8,911 $ 10,324 Finance Property, plant and equipment, net (a) 334 1,478 Liabilities Current Operating Other current liabilities $ 1,463 $ 1,457 Finance Current maturities of long-term debt 150 1,188 Noncurrent Operating Operating lease liabilities $ 9,733 $ 11,196 Finance Long-term debt 190 280 (a) Finance leased assets are recorded net of accumulated amortization of $0.3 million and $0.2 million as of December 31, 2021 and December 31, 2020, respectively. The components of lease expense for the years ended December 31 are as follows: Description Location 2021 2020 Lease expense Operating lease cost Selling, general and administrative expenses $ 2,122 $ 2,103 Finance lease cost: Amortization of leased assets Cost of sales 220 164 Interest on lease liabilities Interest expense 31 19 Variable lease expense Selling, general and administrative expenses 571 588 Short-term lease expense Selling, general and administrative expenses 1,176 260 Total lease expense $ 4,120 $ 3,134 Future minimum finance and operating lease payments were as follows at December 31, 2021: Finance Operating Total 2022 $ 161 $ 2,181 $ 2,342 2023 127 1,705 1,832 2024 63 1,661 1,724 2025 7 1,469 1,476 2026 — 1,501 1,501 Subsequent to 2026 — 6,451 6,451 Total minimum lease payments 358 14,968 $ 15,326 Amounts representing interest 18 3,772 Present value of net minimum lease payments $ 340 $ 11,196 As most of the Company's leases do not provide an implicit rate, the Company determines the incremental borrowing rate based on the information available at the lease commencement date in determining the present value of lease payments. The Company considers its credit rating and the current economic environment in determining this collateralized rate. The assumptions used in accounting for ASC 842 for the years ended December 31 are as follows: Lease term and discount rate 2021 2020 Weighted average remaining lease term (years) Operating 8.38 8.92 Finance 2.44 1.38 Weighted average discount rate Operating 7.08 % 7.00 % Finance 4.16 % 4.11 % The following table details cash paid for amounts included in the measurement of lease liabilities for the years ended December 31: Cash paid for amounts included in the measurement of lease liabilities 2021 2020 Operating cash flows from operating leases $ 2,260 $ 2,223 Operating cash flows from finance leases 31 19 Financing cash flows from finance leases 275 623

Current and Long-Term Financing

Current and Long-Term Financing	12 Months Ended
Current and Long-Term Financing	Dec. 31, 2021
Debt Disclosure [Abstract]
Current and Long-Term Financing	Current and Long-Term Financing Financing arrangements are obtained and maintained at the subsidiary level. NACCO has not guaranteed any borrowings of its subsidiaries. The following table summarizes the Company's available and outstanding borrowings: December 31 2021 2020 Total outstanding borrowings of NACoal: Revolving credit agreement $ 4,000 $ 30,000 Other debt 16,710 16,465 Total debt outstanding $ 20,710 $ 46,465 Current portion of borrowings outstanding $ 2,527 $ 22,112 Long-term portion of borrowings outstanding 18,183 24,353 $ 20,710 $ 46,465 Total available borrowings, net of limitations, under revolving credit agreement $ 120,231 $ 146,951 Unused revolving credit agreement $ 116,231 $ 116,951 Weighted average stated interest rate on total borrowings 3.7 % 2.3 % Annual maturities of total debt, excluding leases, are as follows: 2022 2,377 2023 2,460 2024 2,068 2025 5,175 2026 5,492 Thereafter 2,798 $ 20,370 Interest paid on total debt was $1.6 million and $1.4 million during 2021 and 2020, respectively. Deferred financing fees of $1.8 million were capitalized during 2021. NACoal has a secured revolving line of credit of up to $150.0 million (the “NACoal Facility”) that was refinanced during 2021 and expires in November 2025. Borrowings outstanding under the NACoal Facility were $4.0 million at December 31, 2021. At December 31, 2021, the excess availability under the NACoal Facility was $116.2 million, which reflects a reduction for outstanding letters of credit of $29.8 million. The NACoal Facility has performance-based pricing, which sets interest rates based upon NACoal achieving various levels of debt to EBITDA ratios, as defined in the NACoal Facility. Borrowings bear interest at a floating rate plus a margin based on the level of debt to EBITDA ratio achieved. The applicable margins, effective December 31, 2021, for base rate and LIBOR loans were 1.25% and 2.25%, respectively. The NACoal Facility has a commitment fee which is based upon achieving various levels of debt to EBITDA ratios. The commitment fee was 0.35% on the unused commitment at December 31, 2021. The weighted average interest rate applicable to the NACoal Facility at December 31, 2021 was 4.50% including the floating rate margin. The NACoal Facility contains restrictive covenants, which require, among other things, NACoal to maintain a maximum net debt to EBITDA ratio of 2.75 to 1.00 and an interest coverage ratio of not less than 4.00 to 1.00. The NACoal Facility provides the ability to make loans, dividends and advances to NACCO, with some restrictions based on maintaining a maximum debt to EBITDA ratio of 1.50 to 1.00, or if greater than 1.50 to 1.00, a Fixed Charge Coverage Ratio of 1.10 to 1.00, in conjunction with maintaining unused availability thresholds of borrowing capacity, as defined in the NACoal Facility, of $15.0 million. At December 31, 2021, NACoal was in compliance with all financial covenants in the NACoal Facility. The obligations under the NACoal Facility are guaranteed by certain of NACoal's direct and indirect, existing and future domestic subsidiaries, and is secured by certain assets of NACoal and the guarantors, subject to customary exceptions and limitations. NACoal has a demand note payable to Coteau, one of the unconsolidated subsidiaries, which bears interest based on the applicable quarterly federal short-term interest rate as announced from time to time by the Internal Revenue Service. At December 31, 2021 and 2020, the balance of the note was $2.6 million and $4.4 million and the interest rate was 0.18% and 0.14%, respectively. NACoal has six notes payable that are secured by eleven specified units of equipment, bear interest at a weighted average rate of 4.03%, and expire at various dates through 2027. One note includes a principal payment of $4.4 million at the end of the term on December 15, 2026. At December 31, 2021 and 2020, the outstanding balances of the notes were $13.8 million and $10.6 million, respectively.

Fair Value Disclosure

Fair Value Disclosure	12 Months Ended
Fair Value Disclosure	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Disclosure	Fair Value Disclosure Recurring Fair Value Measurements : The following table presents the Company's assets accounted for at fair value on a recurring basis: Fair Value Measurements at Reporting Date Using Quoted Prices in Significant Active Markets for Significant Other Unobservable Identical Assets Observable Inputs Inputs Description December 31, 2021 (Level 1) (Level 2) (Level 3) Assets: Equity securities $ 16,070 $ 16,070 $ — $ — $ 16,070 $ 16,070 $ — $ — Fair Value Measurements at Reporting Date Using Quoted Prices in Significant Active Markets for Significant Other Unobservable Identical Assets Observable Inputs Inputs Description December 31, 2020 (Level 1) (Level 2) (Level 3) Assets: Equity securities $ 13,164 $ 13,164 $ — $ — $ 13,164 $ 13,164 $ — $ — Bellaire's Mine Water Treatment Trust invests in available for sale securities that are reported at fair value based upon quoted market prices in active markets for identical assets; therefore, they are classified as Level 1 within the fair value hierarchy. The Mine Water Treatment Trust realized a gain of $1.7 million and $1.2 million in the years ended December 31, 2021 and 2020, respectively. See Note 7 for further discussion of Bellaire's Mine Water Treatment Trust. During 2020, the Company invested $2.0 million in equity securities of a public company with a diversified portfolio of royalty producing mineral interests. The investment is reported at fair value based upon quoted market prices in active markets for identical assets; therefore, it is classified as Level 1 within the fair value hierarchy. The Company recognized a gain of $1.7 million and $0.1 million in the years ended December 31, 2021 and 2020, related to the investment in these equity securities. The gains related to equity securities are reported on the line Gain on equity securities in the "Other (income) expense" section of the Consolidated Statements of Operations. There were no transfers into or out of Levels 1, 2 or 3 during the year ended December 31, 2021. Nonrecurring Fair Value Measurements: The Company regularly performs reviews of potential future development projects and identified certain undeveloped properties where market conditions related to any future development deteriorated during 2020. As a result, the Company estimated the fair value of the assets using unobservable inputs, which are classified as Level 3 inputs. The long-lived assets were written down to their estimated fair value, which resulted in a non-cash asset impairment charge of $7.3 million in the Minerals Management segment and $1.1 million in the Coal Mining segment for certain capitalized leasehold costs, prepaid royalties and other assets during 2020. The fair value of these long-lived assets was determined to be zero as such assets were deemed to have no future economic benefit based on the Company's analysis using market participant assumptions, and therefore no expected future cash flows. The impairment charges are reported on the line Asset impairment charges in the Consolidated Statements of Operations. Other Fair Value Measurement Disclosures: The carrying amounts of cash and cash equivalents, accounts receivable and accounts payable approximate fair value due to the short-term maturities of these instruments. The fair values of revolving credit agreements and long-term debt, excluding finance leases, were determined using current rates offered for similar obligations taking into account subsidiary credit risk, which is Level 2 as defined in the fair value hierarchy. The fair value and the book value of revolving credit agreements and long-term debt, excluding finance leases, was $20.5 million and $20.4 million, respectively, at December 31, 2021 and $45.2 million and $45.0 million, respectively, at December 31, 2020. Financial instruments that potentially subject the Company to concentration of credit risk consist principally of accounts receivable. Under its mining contracts, the Company recognizes revenue and a related receivable as coal or limestone is delivered. These mining contracts provide for monthly settlements. The Company's significant credit concentration is uncollateralized; however, historically minimal credit losses have been incurred. To further reduce credit risk associated with accounts receivable, the Company performs periodic credit evaluations of its customers, but does not generally require advance payments or collateral.

Contingencies

Contingencies	12 Months Ended
Contingencies	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies Various legal and regulatory proceedings and claims have been or may be asserted against NACCO and certain subsidiaries relating to the conduct of their businesses. These proceedings and claims are incidental to the ordinary course of business of the Company. Management believes that it has meritorious defenses and will vigorously defend the Company in these actions. Any costs that management estimates will be paid as a result of these claims are accrued when the liability is considered probable and the amount can be reasonably estimated. If a range of amounts can be reasonably estimated and no amount within the range is a better estimate than any other amount, then the minimum of the range is accrued. The Company does not accrue liabilities when the likelihood that the liability has been incurred is probable but the amount cannot be reasonably estimated or when the liability is believed to be only reasonably possible or remote. For contingencies where an unfavorable outcome is probable or reasonably possible and which are material, the Company discloses the nature of the contingency and, in some circumstances, an estimate of the possible loss. These matters are subject to inherent uncertainties, and unfavorable rulings could occur. If an unfavorable ruling were to occur, there exists the possibility of an adverse impact on the Company’s financial position, results of operations and cash flows of the period in which the ruling occurs, or in future periods.

Stockholders' Equity and Earnin

Stockholders' Equity and Earnings Per Share	12 Months Ended
Stockholders' Equity and Earnings Per Share	Dec. 31, 2021
Equity [Abstract]
Stockholders' Equity and Earnings Per Share	Stockholders' Equity and Earnings Per Share NACCO Industries, Inc. Class A common stock is traded on the New York Stock Exchange under the ticker symbol “NC.” Because of transfer restrictions on Class B common stock, no trading market has developed, or is expected to develop, for the Company's Class B common stock. The Class B common stock is convertible into Class A common stock on a one-for-one basis at any time at the request of the holder. The Company's Class A common stock and Class B common stock have the same cash dividend rights per share. As the liquidation and dividend rights are identical, any distribution of earnings would be allocated to Class A and Class B stockholders on a proportionate basis, and accordingly the net income per share for each class of common stock is identical. The Class A common stock has one vote per share and the Class B common stock has ten votes per share. The total number of authorized shares of Class A common stock and Class B common stock at December 31, 2021 was 25,000,000 shares and 6,756,176 shares, respectively. Treasury shares of Class A common stock totaling 2,600,661 and 2,726,017 at December 31, 2021 and 2020, respectively, have been deducted from shares outstanding. Stock Repurchase Programs: On November 10, 2021, the Company's Board of Directors approved a stock purchase program ("2021 Stock Repurchase Program") providing for the purchase of up to $20.0 million of the Company’s outstanding Class A common stock through December 31, 2023. NACCO’s previous repurchase program ("2019 Stock Repurchase Program") would have expired on December 31, 2021 but was terminated and replaced by the 2021 Stock Repurchase Program. The Company repurchased 32,286 shares of Class A common stock under the 2019 Stock Repurchase Program for an aggregate purchase price of $1.0 million during 2020. The timing and amount of any repurchases under the 2021 Stock Repurchase Program are determined at the discretion of the Company's management based on a number of factors, including the availability of capital, other capital allocation alternatives, market conditions for the Company's Class A common stock and other legal and contractual restrictions. The 2021 Stock Repurchase Program does not require the Company to acquire any specific number of shares and may be modified, suspended, extended or terminated by the Company without prior notice and may be executed through open market purchases, privately negotiated transactions or otherwise. All or part of the repurchases under the 2021 Stock Repurchase Program may be implemented under a Rule 10b5-1 trading plan, which would allow repurchases under pre-set terms at times when the Company might otherwise be restricted from doing so under applicable securities laws. Stock Compensation: See Note 2 for a discussion of the Company's restricted stock awards. Earnings per Share: The weighted average number of shares of Class A common stock and Class B common stock outstanding used to calculate basic and diluted earnings per share were as follows: 2021 2020 Basic weighted average shares outstanding 7,146 7,026 Dilutive effect of restricted stock awards 44 31 Diluted weighted average shares outstanding 7,190 7,057 Basic earnings per share $ 6.73 $ 2.11 Diluted earnings per share $ 6.69 $ 2.10

Income Taxes

Income Taxes	12 Months Ended
Income Taxes	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company provides for income taxes and the related accounts under the asset and liability method. Deferred tax assets and liabilities are determined based on the difference between the financial statement and tax bases of assets and liabilities using enacted tax rates expected to be in effect during the year in which the basis differences reverse. Valuation allowances are established when management determines it is more likely than not that some portion, or all, of the deferred tax assets will not be realized. The components of income (loss) before income tax provision (benefit) and the income tax provision (benefit) for the years ended December 31 are as follows: 2021 2020 Income (loss) before income tax provision (benefit) Domestic $ 57,019 $ 13,990 Foreign (169) 268 $ 56,850 $ 14,258 Income tax provision (benefit) Current income tax provision (benefit): Federal $ 10,870 $ (7,859) State 1,443 (408) Foreign (35) 215 Total current 12,278 (8,052) Deferred income tax (benefit) provision: Federal (4,449) 7,847 State 896 (330) Total deferred (3,553) 7,517 $ 8,725 $ (535) The Company made income tax payments of $11.5 million and $0.4 million during 2021 and 2020, respectively. During the same periods, income tax refunds totaled $2.6 million and $4.2 million, respectively. The provision for income taxes differs from the amount computed by applying the statutory federal income tax rate to income before the provision for income taxes. A reconciliation of the federal statutory and effective income tax rate for the years ended December 31 is as follows: 2021 2020 Income before income tax provision $ 56,850 $ 14,258 Statutory taxes at 21.0% $ 11,939 $ 2,994 State and local income taxes 1,890 (626) Non-deductible expenses 725 426 Percentage depletion (6,245) (3,744) R&D and other federal credits (363) (367) Settlements and uncertain tax positions 166 6,286 Coronavirus Aid, Relief, and Economic Security ("CARES") Act - carryback rate differential — (4,741) Other, net 613 (763) Income tax provision $ 8,725 $ (535) Effective income tax rate 15.3 % (3.8) % The Company recorded an income tax expense of $8.7 million for the year ended December 31, 2021 on income before income tax of $56.9 million, or 15.3%, compared to income tax benefit of $0.5 million on income before income tax of $14.3 million, or (3.8%), for the year ended December 31, 2020. The year ended December 31, 2020 includes $7.3 million of discrete tax charges primarily related to settlement of tax examinations, reserves for uncertain tax positions and return to provision adjustments partially offset by a benefit of $4.7 million, primarily due to the rate differential related to carrying back losses under the provisions of the Coronavirus Aid, Relief, and Economic Security Act ("CARES Act"). The CARES Act allows net operating tax losses incurred in 2018, 2019, and 2020 to be carried back to each of the five preceding taxable years to generate a refund of previously paid income taxes. The Company generated a net tax operating loss in 2020 primarily due to the realization of certain deferred tax assets. There were no material discrete items affecting income tax expense in 2021. The effective income tax rate for 2021 reflects the impact of higher pre-tax income in 2021 compared with 2020, including the termination fee associated with the Bisti contract termination. The effective income tax rate varies based upon the mix and timing of earnings between entities that benefit from percentage depletion and those that do not benefit from percentage depletion. The benefit from percentage depletion is not directly related to the amount of pre-tax income recorded in a period. A detailed summary of the total deferred tax assets and liabilities in the Company's Consolidated Balance Sheets resulting from differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes is as follows: December 31 2021 2020 Deferred tax assets Lease liabilities $ 24,500 $ 27,800 Tax carryforwards 13,837 17,756 Inventories 4,522 3,742 Accrued liabilities 9,243 10,160 Employee benefits 3,496 2,747 Land valuation adjustment 5,988 5,536 Other 6,527 5,401 Total deferred tax assets 68,113 73,142 Less: Valuation allowance 11,695 11,549 56,418 61,593 Deferred tax liabilities Lease right-of-use assets 24,500 27,800 Depreciation and depletion 25,851 31,972 Partnership investment - development costs 9,840 11,686 Accrued pension benefits 10,941 7,685 Total deferred tax liabilities 71,132 79,143 Net deferred liability $ (14,714) $ (17,550) The following table summarizes the tax carryforwards and associated carryforward periods and related valuation allowances where the Company has determined that realization is uncertain: December 31, 2021 Net deferred tax Valuation Carryforwards State net operating loss $ 17,516 $ 14,694 2022-2041 December 31, 2020 Net deferred tax Valuation Carryforwards State net operating loss $ 18,708 $ 14,478 2021-2040 Federal research credit 2,648 — 2034-2040 Total $ 21,356 $ 14,478 The Company has a valuation allowance for certain state and foreign deferred tax assets. Based upon the review of historical earnings and the relevant expiration of carryforwards, including utilization limitations in the various state taxing jurisdictions, the Company believes the valuation allowances are appropriate and does not expect to release valuation allowances within the next twelve months that would have a significant effect on the Company's financial position or results of operations. The tax returns of the Company and certain of its subsidiaries are under routine examination by various taxing authorities. The Company has not been informed of any material assessment for which an accrual has not been previously provided and the Company would vigorously contest any material assessment. Management believes any potential adjustment would not materially affect the Company's financial condition or results of operations. In general, the Company operates in taxing jurisdictions that provide a statute of limitations period ranging from three to five years for the taxing authorities to review the applicable tax filings. The examination of the 2013-2016 U.S. federal tax returns is ongoing. The Company has extended the statute of limitations to allow the U.S. taxing authorities to complete their examination. The following is a reconciliation of the Company's total gross unrecognized tax benefits, defined as the aggregate tax effect of differences between tax return positions and the benefits recognized in the financial statements for the years ended December 31, 2021 and 2020. The increase in the gross unrecognized tax benefits in 2020 was primarily due to tax positions related to worthlessness losses for which the timing of deductibility is uncertain. Approximately $6.4 million and $6.3 million of the gross unrecognized tax benefits as of December 31, 2021 and 2020, respectively, relate to permanent items that, if recognized, would impact the effective income tax rate. This amount differs from the gross unrecognized tax benefits presented in the table below due to (1) the deferred tax asset which would be available if the position were not sustained upon audit and (2) the decrease in U.S. federal income taxes which would occur upon the recognition of the state tax benefits included herein. 2021 2020 Balance at January 1 $ 10,459 $ 2,860 Additions based on tax positions related to prior years 95 2,774 Decreases based on settlements with tax authorities — (803) Additions based on tax positions related to the current year — 5,628 Balance at December 31 $ 10,554 $ 10,459 The Company records interest and penalties on uncertain tax positions as a component of the income tax provision. The Company recognized net expense of less than $0.1 million and net benefit of less than $0.1 million in interest and penalties related to uncertain tax positions during 2021 and 2020, respectively. The total amount of interest and penalties accrued was $0.2 million and $0.1 million as of December 31, 2021 and 2020, respectively.

Retirement Benefit Plans

Retirement Benefit Plans	12 Months Ended
Retirement Benefit Plans	Dec. 31, 2021
Retirement Benefits [Abstract]
Retirement Benefit Plans	Retirement Benefit Plans Defined Benefit Plans: The Company maintains defined benefit pension plans that provide benefits based on years of service and average compensation during certain periods. Prior to 2020, the Company amended the Combined Defined Benefit Plan for NACCO Industries, Inc. and its subsidiaries (the “Combined Plan”) to freeze pension benefits for all employees. The Company also amended the Supplemental Retirement Benefit Plan (the “SERP”) to freeze all pension benefits. All eligible employees of the Company, including employees whose pension benefits are frozen, receive retirement benefits under defined contribution retirement plans. The assumptions used in accounting for the defined benefit plans were as follows for the years ended December 31: 2021 2020 Weighted average discount rates for pension benefit obligation 2.53% - 2.77% 2.02% - 2.36% Weighted average discount rates for net periodic benefit cost 2.02% - 2.36% 2.98% - 3.20% Expected long-term rate of return on assets for net periodic benefit cost 7.00 % 7.00 % Set forth below is detail of the net periodic pension income for the defined benefit plans for the years ended December 31: 2021 2020 Interest cost $ 1,002 $ 1,285 Expected return on plan assets (2,568) (2,435) Amortization of actuarial loss 718 597 Amortization of prior service cost 59 58 Net periodic pension income $ (789) $ (495) Set forth below is detail of other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss for the years ended December 31: 2021 2020 Current year actuarial (gain) loss $ (3,793) $ 667 Amortization of actuarial loss (718) (597) Amortization of prior service cost (59) (58) Total recognized in other comprehensive (income) loss $ (4,570) $ 12 The following table sets forth the changes in the benefit obligation and the plan assets during the year and the funded status of the defined benefit plans at December 31: 2021 2020 Change in benefit obligation Projected benefit obligation at beginning of year $ 44,600 $ 41,854 Interest cost 1,002 1,285 Actuarial (gain) loss (1,367) 3,996 Benefits paid (2,572) (2,535) Projected benefit obligation at end of year $ 41,663 $ 44,600 Accumulated benefit obligation at end of year $ 41,663 $ 44,600 Change in plan assets Fair value of plan assets at beginning of year $ 41,099 $ 37,364 Actual return on plan assets 4,995 5,763 Employer contributions 487 507 Benefits paid (2,572) (2,535) Fair value of plan assets at end of year $ 44,009 $ 41,099 Funded status at end of year $ 2,346 $ (3,501) Amounts recognized in the balance sheets consist of: Non-current assets $ 7,806 $ 4,070 Current liabilities (542) (549) Non-current liabilities (4,918) (7,022) $ 2,346 $ (3,501) Components of accumulated other comprehensive loss consist of: Actuarial loss $ 9,510 $ 14,022 Prior service cost 703 761 Deferred taxes (2,254) (3,316) $ 7,959 $ 11,467 The Company recognizes as a component of benefit (income) cost, as of the measurement date, any unrecognized actuarial net gains or losses that exceed 10% of the larger of the projected benefit obligations or the plan assets, defined as the "corridor." Amounts outside the corridor are amortized over the average expected remaining service of active participants expected to benefit under the retiree medical plans or over the average expected remaining lifetime of inactive participants for the pension plans. The (gain) loss amounts recognized in AOCI are not expected to be fully recognized until the plan is terminated or as settlements occur, which would trigger accelerated recognition. Prior service costs resulting from plan changes are also in AOCI. The Company's policy is to make contributions to fund its pension plans within the range allowed by applicable regulations. The Company maintains one supplemental defined benefit plan that pays monthly benefits to participants directly out of corporate funds. All other pension benefit payments are made from assets of the pension plans. Future pension benefit payments expected to be paid from assets of the pension plans are: 2022 $ 2,710 2023 2,697 2024 2,716 2025 2,684 2026 2,672 2027 - 2031 12,779 $ 26,258 The expected long-term rate of return on defined benefit plan assets reflects management's expectations of long-term rates of return on funds invested to provide for benefits included in the projected benefit obligations. In establishing the expected long-term rate of return assumption for plan assets, the Company considers the historical rates of return over a period of time that is consistent with the long-term nature of the underlying obligations of these plans as well as a forward-looking rate of return. The historical and forward-looking rates of return for each of the asset classes used to determine the Company's estimated rate of return assumption were based upon the rates of return earned or expected to be earned by investments in the equivalent benchmark market indices for each of the asset classes. Expected returns for pension plans are based on a calculated market-related value for pension plan assets. Under this methodology, asset gains and losses resulting from actual returns that differ from the Company's expected returns are recognized in the market-related value of assets ratably over three years. The pension plans maintain investment policies that, among other things, establish a portfolio asset allocation methodology with percentage allocation bands for individual asset classes. The investment policies provide that investments are reallocated between asset classes as balances exceed or fall below the appropriate allocation bands. The following is the actual allocation percentage and target allocation percentage for the pension plan assets at December 31: 2021 2020 Target Allocation U.S. equity securities 48.7 % 45.4 % 36.0% - 54.0% Non-U.S. equity securities 19.7 % 20.3 % 16.0% - 24.0% Fixed income securities 31.2 % 33.9 % 30.0% - 40.0% Money market 0.4 % 0.4 % 0.0% - 10.0% The defined benefit pension plans do not have any direct ownership of NACCO common stock. The fair value of each major category of the Company's pension plan assets are valued using quoted market prices in active markets for identical assets, or Level 1 in the fair value hierarchy. Following are the values as of December 31: Level 1 2021 2020 U.S. equity securities $ 21,434 $ 18,640 Non-U.S. equity securities 8,678 8,335 Fixed income securities 13,723 13,948 Money market 174 176 Total $ 44,009 $ 41,099 Postretirement Health Care: The Company also maintains health care plans which provide benefits to grandfathered eligible retired employees. All health care plans of the Company have a cap on the Company's share of the costs. The health care plans have network provided benefits which result in cost savings for the Company. These plans have no assets. Under the Company's current policy, plan benefits are funded at the time they are due to participants. The assumptions used in accounting for the postretirement health care plans are set forth below for the years ended December 31: 2021 2020 Weighted average discount rates for benefit obligation 2.12 % 1.37 % Weighted average discount rates for net periodic benefit cost 1.37 % 1.37% - 2.65% Health care cost trend rate assumed for next year 6.50 % 6.25 % Rate to which the cost trend rate is assumed to decline (ultimate trend rate) 4.50 % 5.00 % Year that the rate reaches the ultimate trend rate 2029 2027 Set forth below is detail of the net periodic benefit expense (income) for the postretirement health care plans for the years ended December 31: 2021 2020 Service cost $ 13 $ 21 Interest cost 27 52 Amortization of actuarial loss (gain) 19 (1) Amortization of prior service credit (54) (59) Amortization of curtailment — (31) Net periodic benefit expense (income) $ 5 $ (18) Set forth below is detail of other changes in plan assets and benefit obligations recognized in other comprehensive loss for the years ended December 31: 2021 2020 Current year actuarial (gain) loss $ (48) $ 194 Amortization of actuarial (loss) gain (19) 1 Amortization of prior service credit 54 59 Amortization of curtailment — 31 Transfers 126 46 Total recognized in other comprehensive loss $ 113 $ 331 The following sets forth the changes in benefit obligations during the year and the funded status of the postretirement health care at December 31: 2021 2020 Change in benefit obligation Benefit obligation at beginning of year $ 2,054 $ 2,049 Service cost 13 21 Interest cost 27 52 Plan amendments — 49 Actuarial (gain) loss (48) 145 Benefits paid (169) (262) Benefit obligation at end of year $ 1,877 $ 2,054 Funded status at end of year $ (1,877) $ (2,054) Amounts recognized in the balance sheets consist of: Current liabilities $ (190) $ (238) Noncurrent liabilities (1,687) (1,816) $ (1,877) $ (2,054) Components of accumulated other comprehensive loss consist of: Actuarial loss $ 520 $ 466 Prior service credit (108) (167) Deferred taxes (195) (167) $ 217 $ 132 Future postretirement health care benefit payments expected to be paid are: 2022 191 2023 191 2024 182 2025 176 2026 169 2027 - 2031 700 $ 1,609

Business Segments

Business Segments	12 Months Ended
Business Segments	Dec. 31, 2021
Segment Reporting [Abstract]
Business Segments	Business Segments The Company’s operating segments are: (i) Coal Mining, (ii) NAMining and (iii) Minerals Management. The Company determines its reportable segments by first identifying its operating segments, and then by assessing whether any components of these segments constitute a business for which discrete financial information is available and where segment management regularly reviews the operating results of that component. The Company’s Chief Operating Decision Maker utilizes operating profit to evaluate segment performance and allocate resources. The Company has items not directly attributable to a reportable segment which are not included as part of the measurement of segment operating profit, which are primarily administrative costs related to public company reporting requirements at the parent company and the financial results of Mitigation Resources and Bellaire. Mitigation Resources generates and sells stream and wetland mitigation credits (known as mitigation banking) and provides services to those engaged in permittee-responsible stream and wetland mitigation. Bellaire manages the Company’s long-term liabilities related to former Eastern U.S. underground mining activities. All financial statement line items below operating profit (other income including interest expense and interest income, the provision for income taxes and net income) are presented and discussed within this Form 10-K on a consolidated basis. See Note 1 for additional discussion of the Company's reportable segments. All current operations reside in the U.S. The accounting policies of the reportable segments are described in Note 2 and Note 20. In 2021 and 2020, two customers individually accounted for more than 10% of consolidated revenue. The following represents the revenue attributable to each of these entities as a percentage of consolidated revenue for those years: Percentage of Consolidated Revenue Segment 2021 2020 Coal Mining customer 43 % 55 % NAMining customer 19 % 19 % In addition, for the year ended December 31, 2021, the Coal Mining segment derived approximately 68% of the Earnings of Unconsolidated Operations from two customers, Basin Electric and GRE. The following tables present revenue, operating profit, depreciation expense and capital expenditures for the years ended December 31: 2021 2020 Revenues Coal Mining $ 91,851 $ 72,088 NAMining 69,924 42,392 Minerals Management 31,003 14,721 Unallocated Items 4,695 2,133 Eliminations (5,627) (2,902) Total $ 191,846 $ 128,432 Operating profit (loss) Coal Mining $ 49,059 $ 25,436 NAMining 109 1,872 Minerals Management 26,080 3,493 Unallocated Items (19,553) (17,256) Eliminations (285) (97) Total $ 55,410 $ 13,448 Expenditures for property, plant and equipment and acquisition of mineral interests Coal Mining $ 16,830 $ 14,825 NAMining 21,100 13,862 Minerals Management 6,423 15,474 Unallocated Items 208 207 Total $ 44,561 $ 44,368 Depreciation, depletion and amortization Coal Mining $ 16,649 $ 14,213 NAMining 4,435 2,470 Minerals Management 1,858 1,308 Unallocated Items 143 123 Total $ 23,085 $ 18,114 Asset information by segment is not discretely maintained for internal reporting or used in evaluating performance.

Parent Company Condensed Balanc

Parent Company Condensed Balance Sheets	12 Months Ended
Parent Company Condensed Balance Sheets	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Parent Company Condensed Balance Sheets	Parent Company Condensed Balance Sheets The condensed balance sheets of NACCO, the parent company, at December 31 are as follows: 2021 2020 ASSETS Cash and cash equivalents $ 83,093 $ 85,365 Accounts receivable from affiliates — 495 Other current assets 17,578 20,648 Investment in subsidiaries 268,720 211,468 Property, plant and equipment, net 57 110 Other non-current assets 4,885 5,890 Total Assets $ 374,333 $ 323,976 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities $ 3,865 $ 3,242 Current intercompany accounts payable, net 637 2,337 Note payable to Bellaire 16,750 16,750 Other non-current liabilities 965 1,023 Stockholders’ equity 352,116 300,624 Total Liabilities and Stockholders’ Equity $ 374,333 $ 323,976 The credit agreement at NACoal allows for the transfer of assets to NACCO under certain circumstances. The amount of NACCO's investment that was restricted at December 31, 2021 totaled approximately $1.8 million. The amount of unrestricted cash available to NACCO included in “Investment in subsidiaries” was $1.2 million at December 31, 2021. Dividends and management fees from its subsidiaries are the primary sources of cash for NACCO. SCHEDULE I—CONDENSED FINANCIAL INFORMATION OF THE PARENT NACCO INDUSTRIES, INC. AND SUBSIDIARIES PARENT COMPANY CONDENSED BALANCE SHEETS December 31 2021 2020 (In thousands) ASSETS Cash and cash equivalents $ 83,093 $ 85,365 Accounts receivable from affiliates — 495 Other current assets 17,578 20,648 Investment in subsidiaries 268,720 211,468 Property, plant and equipment, net 57 110 Other non-current assets 4,885 5,890 Total Assets $ 374,333 $ 323,976 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities $ 3,865 $ 3,242 Current intercompany accounts payable, net 637 2,337 Note payable to Bellaire 16,750 16,750 Other non-current liabilities 965 1,023 Stockholders’ equity 352,116 300,624 Total Liabilities and Stockholders’ Equity $ 374,333 $ 323,976 See Notes to Parent Company Condensed Financial Statements. SCHEDULE I—CONDENSED FINANCIAL INFORMATION OF THE PARENT NACCO INDUSTRIES, INC. AND SUBSIDIARIES PARENT COMPANY CONDENSED STATEMENTS OF COMPREHENSIVE INCOME Year Ended December 31 2021 2020 (In thousands) Expense (income): Intercompany interest expense $ 1,172 $ 1,178 Other, net (336) (1,003) 836 175 Administrative and general expenses 4,300 5,658 Loss before income taxes (5,136) (5,833) Income tax (benefit) provision (463) 2,419 Net loss before equity in earnings of subsidiaries (4,673) (8,252) Equity in earnings of subsidiaries 52,798 23,045 Net income 48,125 14,793 Current period pension and postretirement plan adjustment, net of $864 tax expense and $213 tax benefit in 2021 and 2020, respectively 2,851 (697) Reclassification of pension and postretirement adjustments into earnings, net of $170 and $129 tax benefit in 2021 and 2020, respectively 572 435 Total other comprehensive income 3,423 (262) Comprehensive Income $ 51,548 $ 14,531 See Notes to Parent Company Condensed Financial Statements. SCHEDULE I—CONDENSED FINANCIAL INFORMATION OF THE PARENT NACCO INDUSTRIES, INC. AND SUBSIDIARIES PARENT COMPANY CONDENSED STATEMENTS OF CASH FLOWS Year Ended December 31 2021 2020 (In thousands) Operating Activities Net income $ 48,125 $ 14,793 Equity in earnings of subsidiaries 52,798 23,045 Parent company only net loss (4,673) (8,252) Net changes related to operating activities 8,018 (22,822) Net cash provided by (used for) operating activities 3,345 (31,074) Investing Activities Net cash used for investing activities — — Financing Activities Dividends received from subsidiaries — 3,000 Notes payable to Bellaire — (200) Purchase of treasury shares — (1,002) Cash dividends paid (5,617) (5,375) Net cash used for financing activities (5,617) (3,577) Cash and cash equivalents Decrease for the period (2,272) (34,651) Balance at the beginning of the period 85,365 120,016 Balance at the end of the period $ 83,093 $ 85,365 See Notes to Parent Company Condensed Financial Statements. SCHEDULE I—CONDENSED FINANCIAL INFORMATION OF THE PARENT NACCO INDUSTRIES, INC. AND SUBSIDIARIES NOTES TO PARENT COMPANY CONDENSED FINANCIAL STATEMENTS FOR THE YEAR ENDED DECEMBER 31, 2021 AND 2020 The notes to Consolidated Financial Statements, incorporated in Item 15 of this Form 10-K, are hereby incorporated by reference into these Notes to Parent Company Condensed Financial Statements. NOTE A — ACCOUNTING POLICIES In the Parent Company Condensed Financial Statements, NACCO's investment in subsidiaries is stated at cost plus equity in undistributed earnings of subsidiaries since the date of acquisition. NACCO's share of net income of unconsolidated subsidiaries is included in net income using the equity method. Parent Company financial statements should be read in conjunction with the Company's consolidated financial statements. NOTE B — LONG-TERM OBLIGATIONS AND GUARANTEES It is NACCO's policy not to guarantee the debt of NACoal. NOTE C — UNRESTRICTED CASH The amount of unrestricted cash available to NACCO, included in Investment in subsidiaries, was $1.2 million at December 31, 2021 and was in addition to the $83.1 million of cash included in the Parent Company Condensed Balance Sheet at December 31, 2021.

Unconsolidated Subsidiaries

Unconsolidated Subsidiaries	12 Months Ended
Unconsolidated Subsidiaries	Dec. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]
Unconsolidated Subsidiaries	Unconsolidated Subsidiaries Each of the Company's wholly owned Unconsolidated Subsidiaries, within the Coal Mining and NAMining segments, meet the definition of a VIE. The Unconsolidated Subsidiaries are capitalized primarily with debt financing provided by or supported by their respective customers, and generally without recourse to NACCO and NACoal. Although NACoal owns 100% of the equity and manages the daily operations of the Unconsolidated Subsidiaries, the Company has determined that the equity capital provided by NACoal is not sufficient to adequately finance the ongoing activities or absorb any expected losses without additional support from the customers. The customers have a controlling financial interest and have the power to direct the activities that most significantly affect the economic performance of the entities. As a result, the Company is not the primary beneficiary and therefore does not consolidate these entities' financial positions or results of operations. See Note 1 for a discussion of these entities. The investment in the unconsolidated subsidiaries and related tax positions totaled $19.1 million and $29.0 million at December 31, 2021 and 2020, respectively. The Company's risk of loss relating to these entities is limited to its invested capital, which was $7.6 million and $6.5 million at December 31, 2021 and 2020, respectively. NACoal is a party to certain guarantees related to Coyote Creek. Under certain circumstances of default or termination of Coyote Creek’s Lignite Sales Agreement (“LSA”), NACoal would be obligated for payment of a "make-whole" amount to Coyote Creek’s third-party lenders. The “make-whole” amount is based on the excess, if any, of the discounted value of the remaining scheduled debt payments over the principal amount. In addition, in the event Coyote Creek’s LSA is terminated on or after January 1, 2024 by Coyote Creek’s customers, NACoal is obligated to purchase Coyote Creek’s dragline and rolling stock for the then net book value of those assets. To date, no payments have been required from NACoal since the inception of these guarantees. The Company believes that the likelihood NACoal would be required to perform under the guarantees is remote, and no amounts related to these guarantees have been recorded. Summarized financial information for the unconsolidated subsidiaries is as follows: 2021 2020 Statement of Operations Revenue $ 764,759 $ 768,660 Gross profit $ 68,076 $ 69,021 Income before income taxes $ 60,865 $ 60,398 Net income $ 53,248 $ 50,933 Balance Sheet Current assets $ 168,669 $ 186,934 Non-current assets $ 900,924 $ 959,032 Current liabilities $ 98,887 $ 143,843 Non-current liabilities $ 963,128 $ 995,658 Revenue includes all mine operating costs that are reimbursed by the customers of the Unconsolidated Subsidiaries as well as the compensation per ton of coal, heating unit (MMBtu) or ton of limestone delivered. Reimbursed costs have offsetting expenses and have no impact on income before income taxes. Income before income taxes represents the Earnings of the unconsolidated operations and the Income from other unconsolidated affiliates. NACoal received dividends of $51.7 million and $49.7 million from the Unconsolidated Subsidiaries in 2021 and 2020, respectively.

Related Party Transactions

Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2021
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions One of the Company's directors is a retired Jones Day partner. Legal services rendered by Jones Day approximated $1.2 million and $1.0 million for the years ended December 31, 2021 and 2020. Alfred M. Rankin, Jr. continues to serve as the Chairman of the Board of Directors of NACCO and Mr. Rankin supports the President and Chief Executive Officer of NACCO upon request under the terms of a consulting agreement. Fees for consulting services rendered by Mr. Rankin approximated $0.5 million for both of the years ended December 31, 2021 and 2020. Hyster-Yale Materials Handling, Inc. ("Hyster-Yale") is a former subsidiary of the Company that was spun-off to stockholders in 2012. Mr. Rankin is Chairman, President and Chief Executive Officer of Hyster-Yale Materials Handling and Chairman, Hyster-Yale Group. In the ordinary course of business, NACoal leases or buys Hyster-Yale lift trucks. The terms may not be comparable to terms that would be obtained in a transaction between unaffiliated parties.

Other Events and Transactions

Other Events and Transactions	12 Months Ended
Other Events and Transactions	Dec. 31, 2021
Other Events And Transactions [Abstract]
Other Events and Transactions	Other Events and TransactionsVoluntary Separation Program: During the fourth quarter of 2020, the Company adopted a voluntary separation program ("2020 VSP") for eligible employees who met certain age and service requirements in an effort to reduce overall headcount at the Company’s headquarters. The irrevocable acceptance period for associates electing to participate in the 2020 VSP ended during December 2020. In the fourth quarter of 2020, the Company recorded pre-tax charges for the 2020 VSP of $1.8 million included in Selling, general and administrative expense in the accompanying Consolidated Statements of Operations.

Supplemental Oil and Gas Disclo

Supplemental Oil and Gas Disclosures (Unaudited)	12 Months Ended
Supplemental Oil and Gas Disclosures (Unaudited)	Dec. 31, 2021
Extractive Industries [Abstract]
Supplemental Oil and Gas Disclosures (Unaudited)	Supplemental Oil and Gas Disclosures (Unaudited)The Minerals Management segment derives income primarily by leasing its royalty and mineral interests to third-party exploration and production companies, and, to a lesser extent, other mining companies, granting them the rights to explore, develop, mine, produce, market and sell gas, oil, and coal in exchange for royalty payments based on the lessees' sales of those minerals. As an owner of royalty and mineral interests, the Company’s access to information concerning activity and operations of its royalty and mineral interests is limited. The Company does not have information that would be available to a company with working interests in oil and natural gas operations because detailed information is not generally available to owners of royalty and mineral interests. See Note 1, Note 2 and Note 15 for additional discussion of the Minerals Management segment. During 2021 and 2020, the Minerals Management segment acquired additional mineral interests, primarily in the Eagle Ford and Permian Basins in Texas. Total consideration for the 2021 and 2020 acquisitions of mineral and royalty interests was $5.3 million and $14.2 million, respectively. The 2021 acquisitions include 20.6 thousand gross acres and 1.8 thousand net royalty acres. The 2020 acquisitions include 65.5 thousand gross acres and 1.2 thousand net royalty acres. Total oil and gas mineral and royalty interests include approximately 127.8 thousand gross acres and 59.9 thousand net royalty acres at December 31, 2021. Aggregate capitalized costs related to oil and gas royalty and mineral interests with applicable accumulated depreciation, depletion and amortization at December 31 are as follows: 2021 Proved developed $ 3,266 Proved undeveloped 16,246 Less: accumulated depreciation, depletion and amortization 868 Net royalty interests in oil and natural gas properties $ 18,644 Total net proved reserves are defined as those natural gas and hydrocarbon liquid reserves to Company interests after deducting all royalties, overriding royalties, and reversionary interests owned by outside parties that become effective upon payout of specified monetary balances. Decline curve analysis was used to estimate the remaining reserves of pressure depletion reservoirs with enough historical production data to establish decline trends. Reservoirs under non-pressure depletion drive mechanisms and non-producing reserves were estimated by volumetric analysis, research of analogous reservoirs, or a combination of both. Reserves have been estimated using deterministic and probabilistic methods. All reserves estimates have been prepared using standard engineering practices generally accepted by the petroleum industry and conform to guidelines developed and adopted by the SEC. The following table presents the Company's estimated net proved oil and natural gas reserves as of December 31, 2021 based on the reserve report prepared by Haas Engineering, the Company’s independent petroleum engineering firm. All of the Company’s reserves are located in the United States. Net reserves as of December 31, 2021 Oil (bbl) (1) NGL (bbl) (1) Residue gas (Mcf) (2) Proved developed 167,430 282,230 16,617,360 Proved undeveloped 220 90 1,210 Total 167,650 282,320 16,618,570 (1) Bbl. One stock tank barrel, or 42 U.S. gallons liquid volume. (2) Mcf. One thousand cubic feet of natural gas at the contractual pressure and temperature bases. Standardized Measure of Discounted Future Net Cash Flows Future cash inflows represent expected revenues from production of period-end quantities of proved reserves based on the 12-month unweighted average of first-day-of-the-month commodity prices for the periods presented. Future cash inflows are computed by applying applicable prices relating to proved reserves to the year-end quantities of those reserves. Future production and costs are derived based on current costs assuming continuation of existing economic conditions. Federal income tax expenses are deducted from future production revenues in the calculation of the standardized measure using the statutory tax rate. The Company is subject to certain state based taxes; however, these amounts are not material. The projections should not be viewed as realistic estimates of future cash flows, nor should the “standardized measure” be interpreted as representing current value to the Company. Material revisions to estimates of proved reserves may occur in the future; development and production of the reserves may not occur in the periods assumed; actual prices realized are expected to vary significantly from those used; and actual costs may vary. The following table provides the future net cash flows relating to proved oil and gas reserves based on the standardized measure of discounted cash flows as of December 31, 2021 : Gross Amounts Statutory tax rate Net Amounts Future cash inflows $ 71,400 Future production costs 14,664 Future net cash flows before income tax expense 56,736 21 % 44,821 10% discount to reflect timing of cash flows (19,897) 21 % (15,719) Standardized measure of discounted cash flows $ 36,839 21 % $ 29,102

Schedule I - Condensed Financia

Schedule I - Condensed Financial Information of the Parent	12 Months Ended
Schedule I - Condensed Financial Information of the Parent	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Schedule I - Condensed Financial Information of the Parent	Parent Company Condensed Balance Sheets The condensed balance sheets of NACCO, the parent company, at December 31 are as follows: 2021 2020 ASSETS Cash and cash equivalents $ 83,093 $ 85,365 Accounts receivable from affiliates — 495 Other current assets 17,578 20,648 Investment in subsidiaries 268,720 211,468 Property, plant and equipment, net 57 110 Other non-current assets 4,885 5,890 Total Assets $ 374,333 $ 323,976 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities $ 3,865 $ 3,242 Current intercompany accounts payable, net 637 2,337 Note payable to Bellaire 16,750 16,750 Other non-current liabilities 965 1,023 Stockholders’ equity 352,116 300,624 Total Liabilities and Stockholders’ Equity $ 374,333 $ 323,976 The credit agreement at NACoal allows for the transfer of assets to NACCO under certain circumstances. The amount of NACCO's investment that was restricted at December 31, 2021 totaled approximately $1.8 million. The amount of unrestricted cash available to NACCO included in “Investment in subsidiaries” was $1.2 million at December 31, 2021. Dividends and management fees from its subsidiaries are the primary sources of cash for NACCO. SCHEDULE I—CONDENSED FINANCIAL INFORMATION OF THE PARENT NACCO INDUSTRIES, INC. AND SUBSIDIARIES PARENT COMPANY CONDENSED BALANCE SHEETS December 31 2021 2020 (In thousands) ASSETS Cash and cash equivalents $ 83,093 $ 85,365 Accounts receivable from affiliates — 495 Other current assets 17,578 20,648 Investment in subsidiaries 268,720 211,468 Property, plant and equipment, net 57 110 Other non-current assets 4,885 5,890 Total Assets $ 374,333 $ 323,976 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities $ 3,865 $ 3,242 Current intercompany accounts payable, net 637 2,337 Note payable to Bellaire 16,750 16,750 Other non-current liabilities 965 1,023 Stockholders’ equity 352,116 300,624 Total Liabilities and Stockholders’ Equity $ 374,333 $ 323,976 See Notes to Parent Company Condensed Financial Statements. SCHEDULE I—CONDENSED FINANCIAL INFORMATION OF THE PARENT NACCO INDUSTRIES, INC. AND SUBSIDIARIES PARENT COMPANY CONDENSED STATEMENTS OF COMPREHENSIVE INCOME Year Ended December 31 2021 2020 (In thousands) Expense (income): Intercompany interest expense $ 1,172 $ 1,178 Other, net (336) (1,003) 836 175 Administrative and general expenses 4,300 5,658 Loss before income taxes (5,136) (5,833) Income tax (benefit) provision (463) 2,419 Net loss before equity in earnings of subsidiaries (4,673) (8,252) Equity in earnings of subsidiaries 52,798 23,045 Net income 48,125 14,793 Current period pension and postretirement plan adjustment, net of $864 tax expense and $213 tax benefit in 2021 and 2020, respectively 2,851 (697) Reclassification of pension and postretirement adjustments into earnings, net of $170 and $129 tax benefit in 2021 and 2020, respectively 572 435 Total other comprehensive income 3,423 (262) Comprehensive Income $ 51,548 $ 14,531 See Notes to Parent Company Condensed Financial Statements. SCHEDULE I—CONDENSED FINANCIAL INFORMATION OF THE PARENT NACCO INDUSTRIES, INC. AND SUBSIDIARIES PARENT COMPANY CONDENSED STATEMENTS OF CASH FLOWS Year Ended December 31 2021 2020 (In thousands) Operating Activities Net income $ 48,125 $ 14,793 Equity in earnings of subsidiaries 52,798 23,045 Parent company only net loss (4,673) (8,252) Net changes related to operating activities 8,018 (22,822) Net cash provided by (used for) operating activities 3,345 (31,074) Investing Activities Net cash used for investing activities — — Financing Activities Dividends received from subsidiaries — 3,000 Notes payable to Bellaire — (200) Purchase of treasury shares — (1,002) Cash dividends paid (5,617) (5,375) Net cash used for financing activities (5,617) (3,577) Cash and cash equivalents Decrease for the period (2,272) (34,651) Balance at the beginning of the period 85,365 120,016 Balance at the end of the period $ 83,093 $ 85,365 See Notes to Parent Company Condensed Financial Statements. SCHEDULE I—CONDENSED FINANCIAL INFORMATION OF THE PARENT NACCO INDUSTRIES, INC. AND SUBSIDIARIES NOTES TO PARENT COMPANY CONDENSED FINANCIAL STATEMENTS FOR THE YEAR ENDED DECEMBER 31, 2021 AND 2020 The notes to Consolidated Financial Statements, incorporated in Item 15 of this Form 10-K, are hereby incorporated by reference into these Notes to Parent Company Condensed Financial Statements. NOTE A — ACCOUNTING POLICIES In the Parent Company Condensed Financial Statements, NACCO's investment in subsidiaries is stated at cost plus equity in undistributed earnings of subsidiaries since the date of acquisition. NACCO's share of net income of unconsolidated subsidiaries is included in net income using the equity method. Parent Company financial statements should be read in conjunction with the Company's consolidated financial statements. NOTE B — LONG-TERM OBLIGATIONS AND GUARANTEES It is NACCO's policy not to guarantee the debt of NACoal. NOTE C — UNRESTRICTED CASH The amount of unrestricted cash available to NACCO, included in Investment in subsidiaries, was $1.2 million at December 31, 2021 and was in addition to the $83.1 million of cash included in the Parent Company Condensed Balance Sheet at December 31, 2021.

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts	12 Months Ended
Schedule II - Valuation and Qualifying Accounts	Dec. 31, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule II - Valuation and Qualifying Accounts	SCHEDULE II—VALUATION AND QUALIFYING ACCOUNTS NACCO INDUSTRIES, INC. AND SUBSIDIARIES YEAR ENDED DECEMBER 31, 2021 AND 2020 Additions Description Balance at Beginning of Period Charged to Charged to Deductions Balance at (In thousands) 2021 Reserves deducted from asset accounts: Deferred tax valuation allowances $ 11,549 $ 146 $ — $ — $ 11,695 2020 Reserves deducted from asset accounts: Deferred tax valuation allowances $ 12,296 $ (747) $ — $ — $ 11,549 (A) Balances which are not required to be presented and those which are immaterial have been omitted.

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	12 Months Ended
Significant Accounting Policies (Policies)	Dec. 31, 2021
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates: The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and judgments. These estimates and judgments affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities (if any) at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents: Cash and cash equivalents include cash in banks and highly liquid investments with original maturities of three months or less.
Inventories	Inventories: Inventories are stated at the lower of cost and net realizable value. The weighted average method is used for inventory valuation.
Property, Plant and Equipment, Net	Property, Plant and Equipment, Net: Property, plant and equipment are initially recorded at cost. Depreciation, depletion and amortization are provided in amounts sufficient to amortize the cost of the assets, including assets recorded under finance leases, over their estimated useful lives using the straight-line method or the units-of-production method. Buildings and building improvements are depreciated over the life of the mine, which is generally 30 years. Estimated lives for machinery and equipment range from three
Royalty Interests in Oil and Natural Gas Properties	Royalty Interests in Oil and Natural Gas Properties: The Company follows the successful efforts method of accounting for its royalty and mineral interests. Under this method, costs to acquire mineral and royalty interests in oil and natural gas properties are capitalized when incurred. Acquisitions of royalty interests of oil and natural gas properties are considered asset acquisitions and are recorded at cost. As an owner of mineral and royalty interests and not working interests, the Company is not required to make capital expenditures and did not make capital expenditures to convert proved undeveloped reserves from undeveloped to developed. Acquisition costs of proved royalty and mineral interests are amortized using the units of production method over the life of the property, which is estimated using proved reserves. For purposes of amortization, interests in oil and natural gas properties are grouped in a reasonable aggregation of properties with common geological structural features or stratigraphic condition. The Company reviews and evaluates its royalty interests in oil and natural gas properties for impairment when events or changes in circumstances indicate that the related carrying amounts may not be recoverable. Proved oil and gas properties are reviewed for impairment when events and circumstances indicate a potential decline in the fair value of such properties below the carrying value, such as a downward revision of the reserve estimates or lower commodity prices. When such events or changes in circumstances occur, the Company estimates the undiscounted future cash flows expected in connection with the properties and compares such future cash flows to the carrying amounts of the properties to determine if the carrying amounts are recoverable. If the carrying value of the properties is determined to not be recoverable based on the undiscounted cash flows, an impairment charge is recognized by comparing the carrying value to the estimated fair value of the properties.
Long-Lived Assets	Long-Lived Assets: The Company periodically evaluates long-lived assets for impairment when changes in circumstances or the occurrence of certain events indicate the carrying amount of an asset or asset group may not be recoverable. Upon identification of indicators of impairment, the Company evaluates the carrying value of the asset by comparing the estimated future undiscounted cash flows generated from the use of the asset or asset group and its eventual disposition with the asset's net carrying value. If the carrying value of an asset is considered impaired, an impairment charge is recorded for the amount that the carrying value of the long-lived asset or asset group exceeds its fair value. Fair value is estimated as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. See Note 9 for further discussion of the Company's nonrecurring fair value measurements. At MLMC, the costs of mining operations are not reimbursed by MLMC's customer. As such, increased costs at MLMC or decreased revenues could materially reduce the Company's profitability. Any reduction in customer demand at MLMC, including reductions related to reduced mechanical availability of the customer’s power plant, would adversely affect the Company's operating results and could result in significant impairments. MLMC has approximately $136 million of long-lived assets, including property, plant and equipment and its coal supply agreement intangible asset, which are subject to periodic impairment analyses and review. Identifying and assessing whether impairment indicators exist, or if events or changes in
Coal Supply Agreement	Coal Supply Agreement: The coal supply agreement represents a long-term supply agreement with MLMC's customer and was recorded based on the fair value at the date of acquisition. The coal supply agreement is amortized based on units of production over the term of the agreement, which expires in 2032. The Company reviews identified intangible assets for impairment when changes in circumstances or the occurrence of certain events indicate potential impairment.
Self-insurance Liabilities	Self-insurance Liabilities: The Company is generally self-insured for medical claims, certain workers’ compensation claims and certain closed mine liabilities. An estimated provision for claims reported and for claims incurred but not yet reported under the self-insurance programs is recorded and revised periodically based on industry trends, historical experience and management judgment. In addition, industry trends are considered within management's judgment for valuing claims. Changes in assumptions for such matters as legal judgments and settlements, inflation rates, medical costs and actual experience could cause estimates to change in the near term.
Stock Compensation	Stock Compensation: The Company maintains long-term incentive programs that allow for the grant of shares of Class A common stock, subject to restrictions, as a means of retaining and rewarding selected employees for long-term performance and to increase ownership in the Company. Shares awarded under the plans are fully vested and entitle the stockholder to all rights of common stock ownership except that shares may not be assigned, pledged or otherwise transferred during the restriction period. In general, for shares awarded for years ended December 31, 2021 and December 31, 2020, the restriction period ends at the earliest of (i) three years after the participant's retirement date, (ii) three five The Company also has a stock compensation plan for non-employee directors of the Company under which a portion of the annual retainer for each non-employee director is paid in restricted shares of Class A common stock. For the year ended December 31, 2021, $105,000 ($150,000 for the Chairman) of the non-employee director's annual retainer of $167,000 ($250,000 for the Chairman) was paid in restricted shares of Class A common stock. For the year ended December 31, 2020, $100,000 ($150,000 for the Chairman) of the non-employee director's annual retainer of $162,000 ($250,000 for the Chairman) was paid in restricted shares of Class A common stock. Shares awarded under the plan are fully vested and entitle the stockholder to all rights of common stock ownership except that shares may not be assigned, pledged, hypothecated or otherwise transferred during the restriction period. In general, the restriction period ends at the earliest of (i) ten years from the award date, (ii) the date of the director's death or permanent disability, (iii) five years (or earlier with the approval of the Board of Directors) after the director's date of retirement from the Board of Directors, (iv) the date the director has both retired from the Board of Directors and has reached age 70, or (v) at such other time as determined by the Board of Directors in its sole and absolute discretion. Pursuant to this plan, the Company issued 45,223 and 42,744 shares related to the years ended December 31, 2021 and 2020, respectively. In addition to the mandatory retainer fee received in restricted stock, directors may elect to receive shares of Class A common stock in lieu of cash for up to 100% of the balance of their annual retainer, committee retainer and any committee chairman's fees. These voluntary shares are not subject to any restrictions. Total shares issued under voluntary elections were 753 in 2021 and 745 in 2020. After the issuance of these shares, there were 166,561 shares of Class A common stock available for issuance under this plan. Compensation expense related to these awards was $1.3 million ($1.1 million net of tax) and $1.0 million ($0.8 million net of tax) for the years ended December 31, 2021 and 2020, respectively. Compensation expense represents fair value based on the market price of the shares of Class A common stock at the grant date.
Financial Instruments	Financial Instruments: Financial instruments held by the Company include cash and cash equivalents, accounts receivable, equity securities, accounts payable, revolving credit agreements and long-term debt.
Fair Value Measurements	Fair Value Measurements: The Company accounts for the fair value measurement of its financial assets and liabilities in accordance with U.S. generally accepted accounting principles, which defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. A fair value hierarchy requires an entity to maximize the use of observable inputs, where available, and minimize the use of unobservable inputs when measuring fair value. Described below are the three levels of inputs that may be used to measure fair value: Level 1 - Quoted prices in active markets that are accessible at the measurement date for identical assets or liabilities. Level 2 - Observable prices that are based on inputs not quoted on active markets, but corroborated by market data. Level 3 - Unobservable inputs are used when little or no market data is available. The hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. The classification of fair value measurements within the hierarchy is based upon the lowest level of input that is significant to the measurement. See Note 9 for further discussion of fair value measurements.

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
Revenue Recognition (Tables)	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table disaggregates revenue by major sources for the years ended December 31: Major Goods/Service Lines 2021 2020 Coal Mining $ 91,851 $ 72,088 NAMining 69,924 42,392 Minerals Management 31,003 14,721 Unallocated Items 4,695 2,133 Eliminations (5,627) (2,902) Total revenues $ 191,846 $ 128,432 Timing of Revenue Recognition Goods transferred at a point in time $ 80,515 $ 68,073 Services transferred over time 111,331 60,359 Total revenues $ 191,846 $ 128,432
Contract Balances	The opening and closing balances of the Company’s current and long-term contract liabilities and receivables are as follows: Contract balances Trade accounts receivable Contract asset Contract liability (current) Contract liability (long-term) Balance at January 1, 2021 $ 18,894 $ 4,984 $ 941 $ 3,626 Balance at December 31, 2021 25,667 5,985 4,082 488 Increase (decrease) $ 6,773 $ 1,001 $ 3,141 $ (3,138)

Inventories (Tables)

Inventories (Tables)	12 Months Ended
Inventories (Tables)	Dec. 31, 2021
Inventory Disclosure [Abstract]
Schedule of Inventory	Inventories are summarized as follows: December 31 2021 2020 Coal $ 19,352 $ 17,695 Mining supplies 34,733 29,856 Total inventories $ 54,085 $ 47,551

Property, Plant and Equipment_2

Property, Plant and Equipment, Net (Tables)	12 Months Ended
Property, Plant and Equipment, Net (Tables)	Dec. 31, 2021
Property, Plant and Equipment, Net [Abstract]
Property, Plant and Equipment	Property, plant and equipment, net includes the following: December 31 2021 2020 Coal lands and real estate $ 52,011 $ 50,887 Mineral interests 19,512 14,181 Plant and equipment 264,110 231,190 Property, plant and equipment, at cost 335,633 296,258 Less allowances for depreciation, depletion and amortization 142,466 123,841 $ 193,167 $ 172,417

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
Intangible Assets (Tables)	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Finite-Lived Intangible Assets	The gross and net balances are set forth in the following table: Gross Carrying Accumulated Net Balance at December 31, 2021 Coal supply agreement $ 84,200 $ (52,426) $ 31,774 Balance at December 31, 2020 Coal supply agreement $ 84,200 $ (48,870) $ 35,330

Asset Retirement Obligations (T

Asset Retirement Obligations (Tables)	12 Months Ended
Asset Retirement Obligations (Tables)	Dec. 31, 2021
Asset Retirement Obligation Disclosure [Abstract]
Schedule of Change in Asset Retirement Obligation	A reconciliation of the Company's beginning and ending aggregate carrying amount of the asset retirement obligations are as follows: Coal Mining NAMining Unallocated Items NACCO Balance at January 1, 2020 $ 19,015 $ 604 $ 17,240 $ 36,859 Liabilities incurred during the period 9,809 — — 9,809 Liabilities settled during the period (5,977) — (732) (6,709) Accretion expense 1,793 — 1,022 2,815 Revision of estimated cash flows 400 (604) (838) (1,042) Balance at December 31, 2020 $ 25,040 $ — $ 16,692 $ 41,732 Liabilities settled during the period (184) — (869) (1,053) Accretion expense 1,996 — 1,304 3,300 Revision of estimated cash flows 46 — (74) (28) Balance at December 31, 2021 $ 26,898 $ — $ 17,053 $ 43,951

Leases (Tables)

Leases (Tables)	12 Months Ended
Leases (Tables)	Dec. 31, 2021
Leases [Abstract]
Schedule of Leased Assets and Liabilities	Leased assets and liabilities include the following: Description Location DECEMBER 31 DECEMBER 31 Assets Operating Operating lease right-of-use assets $ 8,911 $ 10,324 Finance Property, plant and equipment, net (a) 334 1,478 Liabilities Current Operating Other current liabilities $ 1,463 $ 1,457 Finance Current maturities of long-term debt 150 1,188 Noncurrent Operating Operating lease liabilities $ 9,733 $ 11,196 Finance Long-term debt 190 280 (a) Finance leased assets are recorded net of accumulated amortization of $0.3 million and $0.2 million as of December 31, 2021 and December 31, 2020, respectively.
Lease Expense	The components of lease expense for the years ended December 31 are as follows: Description Location 2021 2020 Lease expense Operating lease cost Selling, general and administrative expenses $ 2,122 $ 2,103 Finance lease cost: Amortization of leased assets Cost of sales 220 164 Interest on lease liabilities Interest expense 31 19 Variable lease expense Selling, general and administrative expenses 571 588 Short-term lease expense Selling, general and administrative expenses 1,176 260 Total lease expense $ 4,120 $ 3,134
Finance Leases, Future Minimum Payments	Future minimum finance and operating lease payments were as follows at December 31, 2021: Finance Operating Total 2022 $ 161 $ 2,181 $ 2,342 2023 127 1,705 1,832 2024 63 1,661 1,724 2025 7 1,469 1,476 2026 — 1,501 1,501 Subsequent to 2026 — 6,451 6,451 Total minimum lease payments 358 14,968 $ 15,326 Amounts representing interest 18 3,772 Present value of net minimum lease payments $ 340 $ 11,196
Operating Leases, Future Minimum Payments	Future minimum finance and operating lease payments were as follows at December 31, 2021: Finance Operating Total 2022 $ 161 $ 2,181 $ 2,342 2023 127 1,705 1,832 2024 63 1,661 1,724 2025 7 1,469 1,476 2026 — 1,501 1,501 Subsequent to 2026 — 6,451 6,451 Total minimum lease payments 358 14,968 $ 15,326 Amounts representing interest 18 3,772 Present value of net minimum lease payments $ 340 $ 11,196
Assumptions Used for Leases	The assumptions used in accounting for ASC 842 for the years ended December 31 are as follows: Lease term and discount rate 2021 2020 Weighted average remaining lease term (years) Operating 8.38 8.92 Finance 2.44 1.38 Weighted average discount rate Operating 7.08 % 7.00 % Finance 4.16 % 4.11 %
Supplemental Cash Flow Information	The following table details cash paid for amounts included in the measurement of lease liabilities for the years ended December 31: Cash paid for amounts included in the measurement of lease liabilities 2021 2020 Operating cash flows from operating leases $ 2,260 $ 2,223 Operating cash flows from finance leases 31 19 Financing cash flows from finance leases 275 623

Current and Long-Term Financi_2

Current and Long-Term Financing (Tables)	12 Months Ended
Current and Long-Term Financing (Tables)	Dec. 31, 2021
Debt Disclosure [Abstract]
Schedule of Debt	The following table summarizes the Company's available and outstanding borrowings: December 31 2021 2020 Total outstanding borrowings of NACoal: Revolving credit agreement $ 4,000 $ 30,000 Other debt 16,710 16,465 Total debt outstanding $ 20,710 $ 46,465 Current portion of borrowings outstanding $ 2,527 $ 22,112 Long-term portion of borrowings outstanding 18,183 24,353 $ 20,710 $ 46,465 Total available borrowings, net of limitations, under revolving credit agreement $ 120,231 $ 146,951 Unused revolving credit agreement $ 116,231 $ 116,951 Weighted average stated interest rate on total borrowings 3.7 % 2.3 %
Schedule of Maturities of Total Debt, Excluding Capital Leases	Annual maturities of total debt, excluding leases, are as follows: 2022 2,377 2023 2,460 2024 2,068 2025 5,175 2026 5,492 Thereafter 2,798 $ 20,370

Fair Value Disclosure (Tables)

Fair Value Disclosure (Tables)	12 Months Ended
Fair Value Disclosure (Tables)	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following table presents the Company's assets accounted for at fair value on a recurring basis: Fair Value Measurements at Reporting Date Using Quoted Prices in Significant Active Markets for Significant Other Unobservable Identical Assets Observable Inputs Inputs Description December 31, 2021 (Level 1) (Level 2) (Level 3) Assets: Equity securities $ 16,070 $ 16,070 $ — $ — $ 16,070 $ 16,070 $ — $ — Fair Value Measurements at Reporting Date Using Quoted Prices in Significant Active Markets for Significant Other Unobservable Identical Assets Observable Inputs Inputs Description December 31, 2020 (Level 1) (Level 2) (Level 3) Assets: Equity securities $ 13,164 $ 13,164 $ — $ — $ 13,164 $ 13,164 $ — $ —

Stockholders' Equity and Earn_2

Stockholders' Equity and Earnings Per Share (Tables)	12 Months Ended
Stockholders' Equity and Earnings Per Share (Tables)	Dec. 31, 2021
Equity [Abstract]
Schedule of Earnings Per Share	The weighted average number of shares of Class A common stock and Class B common stock outstanding used to calculate basic and diluted earnings per share were as follows: 2021 2020 Basic weighted average shares outstanding 7,146 7,026 Dilutive effect of restricted stock awards 44 31 Diluted weighted average shares outstanding 7,190 7,057 Basic earnings per share $ 6.73 $ 2.11 Diluted earnings per share $ 6.69 $ 2.10

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Schedule of Income Tax Expense (Benefit)	The components of income (loss) before income tax provision (benefit) and the income tax provision (benefit) for the years ended December 31 are as follows: 2021 2020 Income (loss) before income tax provision (benefit) Domestic $ 57,019 $ 13,990 Foreign (169) 268 $ 56,850 $ 14,258 Income tax provision (benefit) Current income tax provision (benefit): Federal $ 10,870 $ (7,859) State 1,443 (408) Foreign (35) 215 Total current 12,278 (8,052) Deferred income tax (benefit) provision: Federal (4,449) 7,847 State 896 (330) Total deferred (3,553) 7,517 $ 8,725 $ (535)
Effective Income Tax Rate Reconciliation	A reconciliation of the federal statutory and effective income tax rate for the years ended December 31 is as follows: 2021 2020 Income before income tax provision $ 56,850 $ 14,258 Statutory taxes at 21.0% $ 11,939 $ 2,994 State and local income taxes 1,890 (626) Non-deductible expenses 725 426 Percentage depletion (6,245) (3,744) R&D and other federal credits (363) (367) Settlements and uncertain tax positions 166 6,286 Coronavirus Aid, Relief, and Economic Security ("CARES") Act - carryback rate differential — (4,741) Other, net 613 (763) Income tax provision $ 8,725 $ (535) Effective income tax rate 15.3 % (3.8) %
Deferred Tax Assets and Liabilities	A detailed summary of the total deferred tax assets and liabilities in the Company's Consolidated Balance Sheets resulting from differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes is as follows: December 31 2021 2020 Deferred tax assets Lease liabilities $ 24,500 $ 27,800 Tax carryforwards 13,837 17,756 Inventories 4,522 3,742 Accrued liabilities 9,243 10,160 Employee benefits 3,496 2,747 Land valuation adjustment 5,988 5,536 Other 6,527 5,401 Total deferred tax assets 68,113 73,142 Less: Valuation allowance 11,695 11,549 56,418 61,593 Deferred tax liabilities Lease right-of-use assets 24,500 27,800 Depreciation and depletion 25,851 31,972 Partnership investment - development costs 9,840 11,686 Accrued pension benefits 10,941 7,685 Total deferred tax liabilities 71,132 79,143 Net deferred liability $ (14,714) $ (17,550)
Summary of Tax Credit Carryforwards	The following table summarizes the tax carryforwards and associated carryforward periods and related valuation allowances where the Company has determined that realization is uncertain: December 31, 2021 Net deferred tax Valuation Carryforwards State net operating loss $ 17,516 $ 14,694 2022-2041 December 31, 2020 Net deferred tax Valuation Carryforwards State net operating loss $ 18,708 $ 14,478 2021-2040 Federal research credit 2,648 — 2034-2040 Total $ 21,356 $ 14,478
Unrecognized Tax Benefits Roll Forward	The following is a reconciliation of the Company's total gross unrecognized tax benefits, defined as the aggregate tax effect of differences between tax return positions and the benefits recognized in the financial statements for the years ended December 31, 2021 and 2020. The increase in the gross unrecognized tax benefits in 2020 was primarily due to tax positions related to worthlessness losses for which the timing of deductibility is uncertain. Approximately $6.4 million and $6.3 million of the gross unrecognized tax benefits as of December 31, 2021 and 2020, respectively, relate to permanent items that, if recognized, would impact the effective income tax rate. This amount differs from the gross unrecognized tax benefits presented in the table below due to (1) the deferred tax asset which would be available if the position were not sustained upon audit and (2) the decrease in U.S. federal income taxes which would occur upon the recognition of the state tax benefits included herein. 2021 2020 Balance at January 1 $ 10,459 $ 2,860 Additions based on tax positions related to prior years 95 2,774 Decreases based on settlements with tax authorities — (803) Additions based on tax positions related to the current year — 5,628 Balance at December 31 $ 10,554 $ 10,459

Retirement Benefit Plans (Table

Retirement Benefit Plans (Tables)	12 Months Ended
Retirement Benefit Plans (Tables)	Dec. 31, 2021
Retirement Benefits [Abstract]
Assumptions used in accounting for the defined benefit plan	The assumptions used in accounting for the defined benefit plans were as follows for the years ended December 31: 2021 2020 Weighted average discount rates for pension benefit obligation 2.53% - 2.77% 2.02% - 2.36% Weighted average discount rates for net periodic benefit cost 2.02% - 2.36% 2.98% - 3.20% Expected long-term rate of return on assets for net periodic benefit cost 7.00 % 7.00 % The assumptions used in accounting for the postretirement health care plans are set forth below for the years ended December 31: 2021 2020 Weighted average discount rates for benefit obligation 2.12 % 1.37 % Weighted average discount rates for net periodic benefit cost 1.37 % 1.37% - 2.65% Health care cost trend rate assumed for next year 6.50 % 6.25 % Rate to which the cost trend rate is assumed to decline (ultimate trend rate) 4.50 % 5.00 % Year that the rate reaches the ultimate trend rate 2029 2027
Net periodic benefit income and expense for the defined benefit plan	Set forth below is detail of the net periodic pension income for the defined benefit plans for the years ended December 31: 2021 2020 Interest cost $ 1,002 $ 1,285 Expected return on plan assets (2,568) (2,435) Amortization of actuarial loss 718 597 Amortization of prior service cost 59 58 Net periodic pension income $ (789) $ (495) Set forth below is detail of the net periodic benefit expense (income) for the postretirement health care plans for the years ended December 31: 2021 2020 Service cost $ 13 $ 21 Interest cost 27 52 Amortization of actuarial loss (gain) 19 (1) Amortization of prior service credit (54) (59) Amortization of curtailment — (31) Net periodic benefit expense (income) $ 5 $ (18)
Changes in plan assets and benefit obligations recognized in comprehensive income (loss)	Set forth below is detail of other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss for the years ended December 31: 2021 2020 Current year actuarial (gain) loss $ (3,793) $ 667 Amortization of actuarial loss (718) (597) Amortization of prior service cost (59) (58) Total recognized in other comprehensive (income) loss $ (4,570) $ 12 Set forth below is detail of other changes in plan assets and benefit obligations recognized in other comprehensive loss for the years ended December 31: 2021 2020 Current year actuarial (gain) loss $ (48) $ 194 Amortization of actuarial (loss) gain (19) 1 Amortization of prior service credit 54 59 Amortization of curtailment — 31 Transfers 126 46 Total recognized in other comprehensive loss $ 113 $ 331
Changes in benefit obligations during the year and funded status of defined benefit plan	The following table sets forth the changes in the benefit obligation and the plan assets during the year and the funded status of the defined benefit plans at December 31: 2021 2020 Change in benefit obligation Projected benefit obligation at beginning of year $ 44,600 $ 41,854 Interest cost 1,002 1,285 Actuarial (gain) loss (1,367) 3,996 Benefits paid (2,572) (2,535) Projected benefit obligation at end of year $ 41,663 $ 44,600 Accumulated benefit obligation at end of year $ 41,663 $ 44,600 Change in plan assets Fair value of plan assets at beginning of year $ 41,099 $ 37,364 Actual return on plan assets 4,995 5,763 Employer contributions 487 507 Benefits paid (2,572) (2,535) Fair value of plan assets at end of year $ 44,009 $ 41,099 Funded status at end of year $ 2,346 $ (3,501) Amounts recognized in the balance sheets consist of: Non-current assets $ 7,806 $ 4,070 Current liabilities (542) (549) Non-current liabilities (4,918) (7,022) $ 2,346 $ (3,501) Components of accumulated other comprehensive loss consist of: Actuarial loss $ 9,510 $ 14,022 Prior service cost 703 761 Deferred taxes (2,254) (3,316) $ 7,959 $ 11,467 The following sets forth the changes in benefit obligations during the year and the funded status of the postretirement health care at December 31: 2021 2020 Change in benefit obligation Benefit obligation at beginning of year $ 2,054 $ 2,049 Service cost 13 21 Interest cost 27 52 Plan amendments — 49 Actuarial (gain) loss (48) 145 Benefits paid (169) (262) Benefit obligation at end of year $ 1,877 $ 2,054 Funded status at end of year $ (1,877) $ (2,054) Amounts recognized in the balance sheets consist of: Current liabilities $ (190) $ (238) Noncurrent liabilities (1,687) (1,816) $ (1,877) $ (2,054) Components of accumulated other comprehensive loss consist of: Actuarial loss $ 520 $ 466 Prior service credit (108) (167) Deferred taxes (195) (167) $ 217 $ 132
Future benefit payments	Future pension benefit payments expected to be paid from assets of the pension plans are: 2022 $ 2,710 2023 2,697 2024 2,716 2025 2,684 2026 2,672 2027 - 2031 12,779 $ 26,258 Future postretirement health care benefit payments expected to be paid are: 2022 191 2023 191 2024 182 2025 176 2026 169 2027 - 2031 700 $ 1,609
Actual allocation percentage and target allocation percentage for pension plan assets	The following is the actual allocation percentage and target allocation percentage for the pension plan assets at December 31: 2021 2020 Target Allocation U.S. equity securities 48.7 % 45.4 % 36.0% - 54.0% Non-U.S. equity securities 19.7 % 20.3 % 16.0% - 24.0% Fixed income securities 31.2 % 33.9 % 30.0% - 40.0% Money market 0.4 % 0.4 % 0.0% - 10.0%
Fair value of pension plan assets	The fair value of each major category of the Company's pension plan assets are valued using quoted market prices in active markets for identical assets, or Level 1 in the fair value hierarchy. Following are the values as of December 31: Level 1 2021 2020 U.S. equity securities $ 21,434 $ 18,640 Non-U.S. equity securities 8,678 8,335 Fixed income securities 13,723 13,948 Money market 174 176 Total $ 44,009 $ 41,099

Business Segments (Tables)

Business Segments (Tables)	12 Months Ended
Business Segments (Tables)	Dec. 31, 2021
Segment Reporting [Abstract]
Schedule of Revenue by Major Customers by Reporting Segments	The following represents the revenue attributable to each of these entities as a percentage of consolidated revenue for those years: Percentage of Consolidated Revenue Segment 2021 2020 Coal Mining customer 43 % 55 % NAMining customer 19 % 19 %
Segment Reporting Information	The following tables present revenue, operating profit, depreciation expense and capital expenditures for the years ended December 31: 2021 2020 Revenues Coal Mining $ 91,851 $ 72,088 NAMining 69,924 42,392 Minerals Management 31,003 14,721 Unallocated Items 4,695 2,133 Eliminations (5,627) (2,902) Total $ 191,846 $ 128,432 Operating profit (loss) Coal Mining $ 49,059 $ 25,436 NAMining 109 1,872 Minerals Management 26,080 3,493 Unallocated Items (19,553) (17,256) Eliminations (285) (97) Total $ 55,410 $ 13,448 Expenditures for property, plant and equipment and acquisition of mineral interests Coal Mining $ 16,830 $ 14,825 NAMining 21,100 13,862 Minerals Management 6,423 15,474 Unallocated Items 208 207 Total $ 44,561 $ 44,368 Depreciation, depletion and amortization Coal Mining $ 16,649 $ 14,213 NAMining 4,435 2,470 Minerals Management 1,858 1,308 Unallocated Items 143 123 Total $ 23,085 $ 18,114

Parent Company Condensed Bala_2

Parent Company Condensed Balance Sheets (Tables)	12 Months Ended
Parent Company Condensed Balance Sheets (Tables)	Dec. 31, 2021
Condensed Financial Information Disclosure [Abstract]
Condensed Balance Sheet	The condensed balance sheets of NACCO, the parent company, at December 31 are as follows: 2021 2020 ASSETS Cash and cash equivalents $ 83,093 $ 85,365 Accounts receivable from affiliates — 495 Other current assets 17,578 20,648 Investment in subsidiaries 268,720 211,468 Property, plant and equipment, net 57 110 Other non-current assets 4,885 5,890 Total Assets $ 374,333 $ 323,976 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities $ 3,865 $ 3,242 Current intercompany accounts payable, net 637 2,337 Note payable to Bellaire 16,750 16,750 Other non-current liabilities 965 1,023 Stockholders’ equity 352,116 300,624 Total Liabilities and Stockholders’ Equity $ 374,333 $ 323,976

Unconsolidated Subsidiaries (Ta

Unconsolidated Subsidiaries (Tables)	12 Months Ended
Unconsolidated Subsidiaries (Tables)	Dec. 31, 2021
Equity Method Investments and Joint Ventures [Abstract]
Condensed Financial Statements	Summarized financial information for the unconsolidated subsidiaries is as follows: 2021 2020 Statement of Operations Revenue $ 764,759 $ 768,660 Gross profit $ 68,076 $ 69,021 Income before income taxes $ 60,865 $ 60,398 Net income $ 53,248 $ 50,933 Balance Sheet Current assets $ 168,669 $ 186,934 Non-current assets $ 900,924 $ 959,032 Current liabilities $ 98,887 $ 143,843 Non-current liabilities $ 963,128 $ 995,658

Supplemental Oil and Gas Disc_2

Supplemental Oil and Gas Disclosures (Unaudited) (Tables)	12 Months Ended
Supplemental Oil and Gas Disclosures (Unaudited) (Tables)	Dec. 31, 2021
Extractive Industries [Abstract]
Schedule of Oil and Natural Gas Properties	Aggregate capitalized costs related to oil and gas royalty and mineral interests with applicable accumulated depreciation, depletion and amortization at December 31 are as follows: 2021 Proved developed $ 3,266 Proved undeveloped 16,246 Less: accumulated depreciation, depletion and amortization 868 Net royalty interests in oil and natural gas properties $ 18,644
Schedule of Proved Developed and Undeveloped Oil and Gas Reserve Quantities	The following table presents the Company's estimated net proved oil and natural gas reserves as of December 31, 2021 based on the reserve report prepared by Haas Engineering, the Company’s independent petroleum engineering firm. All of the Company’s reserves are located in the United States. Net reserves as of December 31, 2021 Oil (bbl) (1) NGL (bbl) (1) Residue gas (Mcf) (2) Proved developed 167,430 282,230 16,617,360 Proved undeveloped 220 90 1,210 Total 167,650 282,320 16,618,570 (1) Bbl. One stock tank barrel, or 42 U.S. gallons liquid volume. (2) Mcf. One thousand cubic feet of natural gas at the contractual pressure and temperature bases.
Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure	The following table provides the future net cash flows relating to proved oil and gas reserves based on the standardized measure of discounted cash flows as of December 31, 2021 : Gross Amounts Statutory tax rate Net Amounts Future cash inflows $ 71,400 Future production costs 14,664 Future net cash flows before income tax expense 56,736 21 % 44,821 10% discount to reflect timing of cash flows (19,897) 21 % (15,719) Standardized measure of discounted cash flows $ 36,839 21 % $ 29,102

Principles of Consolidation a_2

Principles of Consolidation and Nature of Operations (Narrative) (Details) $ in Thousands, T in Millions	Sep. 30, 2021USD ($)	Jun. 17, 2021USD ($)	Dec. 31, 2021USD ($)operatingSegmentT	Dec. 31, 2020USD ($)
Long-term Purchase Commitment [Line Items]
Number of operating segments \| operatingSegment			3
Contract termination settlement			$ 10,333	$ 0
Coal Mining customer \| Midwest AgEnergy
Long-term Purchase Commitment [Line Items]
Investment			$ 5,000
Coal Mining customer \| Bisti
Long-term Purchase Commitment [Line Items]
Contract termination settlement	$ 10,300
Coal Mining customer \| Falkirk
Long-term Purchase Commitment [Line Items]
Contract termination settlement		$ 14,000
Coal Mining customer \| Falkirk \| Long-term Contract with Customer
Long-term Purchase Commitment [Line Items]
Historical lignite coal annual delivery \| T			0.3
Coal Mining customer \| Falkirk \| Maximum
Long-term Purchase Commitment [Line Items]
Possible additional payment from cancelation of agreement			$ 8,000
Coal Mining customer \| Falkirk \| Minimum
Long-term Purchase Commitment [Line Items]
Possible additional payment from cancelation of agreement			$ 2,000

Significant Accounting Polici_3

Significant Accounting Policies (Property Plant and Equipment & Intangible Assets) (Details)	12 Months Ended
	Dec. 31, 2021
Building and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life	30 years
Machinery and equipment \| Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life	3 years
Machinery and equipment \| Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment useful life	15 years

Significant Accounting Polici_4

Significant Accounting Policies (Long-Lived Assets) (Details) $ in Millions	Dec. 31, 2021USD ($)
MLMC
Impaired Assets to be Disposed of by Method Other than Sale [Line Items]
Long-lived assets	$ 136

Significant Accounting Polici_5

Significant Accounting Policies (Stock-based Compensation and Other) (Details) - Class A Common Stock - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Executives \| Share-based Payment Arrangement
Schedule of Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued during the year under the Company's stock compensation plans (shares)	138,306	79,380
Class A common stock available for issuance under the plan (shares)	561,694
Compensation expense related to share awards	$ 4,100,000	$ 2,000,000
Compensation expense related to share awards, net of tax	3,200,000	1,600,000
Chairman \| Restricted stock
Schedule of Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount of directors, annual retainer paid in restricted shares	150,000	150,000
Annual non-employee directors retainer amount	$ 250,000	250,000
Non-employee directors \| Share-based Payment Arrangement
Schedule of Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class A common stock available for issuance under the plan (shares)	166,561
Compensation expense related to share awards	$ 1,300,000	1,000,000
Compensation expense related to share awards, net of tax	$ 1,100,000	$ 800,000
Non-employee directors \| Restricted stock
Schedule of Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued during the year under the Company's stock compensation plans (shares)	45,223	42,744
Amount of directors, annual retainer paid in restricted shares	$ 105,000	$ 100,000
Annual non-employee directors retainer amount	$ 167,000	$ 162,000
Non-employee directors \| Voluntary shares
Schedule of Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued during the year under the Company's stock compensation plans (shares)	753	745
Percentage of annual retainer that may be received in shares of Class A stock (percent)	100.00%
Participant's retirement date \| Executives \| Share-based Payment Arrangement
Schedule of Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Duration of restrictions on stock assignment, pledges or transfers	3 years
Participants retirement from board of directors \| Non-employee directors \| Share-based Payment Arrangement
Schedule of Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Duration of restrictions on stock assignment, pledges or transfers	5 years
Minimum age of director upon retirement from board \| Non-employee directors \| Share-based Payment Arrangement
Schedule of Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Duration of restrictions on stock assignment, pledges or transfers	70 years
Award date \| Executives \| Share-based Payment Arrangement
Schedule of Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Duration of restrictions on stock assignment, pledges or transfers	5 years
Award date \| Non-employee directors \| Share-based Payment Arrangement
Schedule of Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Duration of restrictions on stock assignment, pledges or transfers	10 years
Minimum \| Award date \| Executives \| Share-based Payment Arrangement
Schedule of Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Duration of restrictions on stock assignment, pledges or transfers	3 years
Maximum \| Award date \| Executives \| Share-based Payment Arrangement
Schedule of Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Duration of restrictions on stock assignment, pledges or transfers	10 years

Revenue Recognition (Disaggrega

Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 191,846	$ 128,432
Goods transferred at a point in time
Disaggregation of Revenue [Line Items]
Revenues	80,515	68,073
Services transferred over time
Disaggregation of Revenue [Line Items]
Revenues	111,331	60,359
Operating Segments \| Coal Mining customer
Disaggregation of Revenue [Line Items]
Revenues	91,851	72,088
Operating Segments \| NAMining
Disaggregation of Revenue [Line Items]
Revenues	69,924	42,392
Operating Segments \| Minerals Management lessee
Disaggregation of Revenue [Line Items]
Revenues	31,003	14,721
Unallocated Items
Disaggregation of Revenue [Line Items]
Revenues	4,695	2,133
Eliminations
Disaggregation of Revenue [Line Items]
Revenues	$ (5,627)	$ (2,902)

Revenue Recognition (Contract B

Revenue Recognition (Contract Balances) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)
Trade accounts receivable
Balance, January 1, 2020	$ 18,894
Balance, December 31, 2020	25,667
Increase (decrease) in accounts receivable	6,773
Contract asset (long-term)
Balance, January 1, 2020	4,984
Balance, December 31, 2020	5,985
Increase (decrease) in long-term assets	1,001
Contract liability (current)
Balance, January 1, 2020	941
Balance, December 31, 2020	4,082
Increase (decrease) in contract liability (current)	3,141
Contract liability (long-term)
Balance, January 1, 2020	3,626
Balance, December 31, 2020	488
Increase (decrease) in contract liability (long-term)	$ (3,138)

Revenue Recognition (Narrative)

Revenue Recognition (Narrative) (Details) - USD ($)	12 Months Ended
Revenue Recognition (Narrative) (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Primary term of contract	5 years
Performance obligations satisfied in prior period, amount recognized	$ 1,800,000
Opening contract liability	1,400,000	$ 900,000
Contract assets recognized	$ 0

Revenue Recognition (Remaining

Revenue Recognition (Remaining Performance Obligations) (Details) $ in Millions	Dec. 31, 2021USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue from Contract with Customer [Abstract]
Revenue expected to be recognized	$ 4.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, amount	$ 4.1
Remaining performance period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue from Contract with Customer [Abstract]
Revenue expected to be recognized	$ 0.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, amount	$ 0.3
Remaining performance period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue from Contract with Customer [Abstract]
Revenue expected to be recognized	$ 0.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, amount	$ 0.1
Remaining performance period	1 year

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	12 Months Ended
Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Coal	$ 19,352	$ 17,695
Mining supplies	34,733	29,856
Total inventories	54,085	47,551
Inventory impairment	$ 0	$ 1,973

Property, Plant and Equipment_3

Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	$ 335,633	$ 296,258
Less allowances for depreciation, depletion and amortization	142,466	123,841
Property, plant and equipment, net	193,167	172,417
Depreciation, depletion and amortization	19,500	15,500
Coal lands and real estate
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	52,011	50,887
Mineral interests
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	19,512	14,181
Plant and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, at cost	$ 264,110	$ 231,190

Intangible Assets (Details)

Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets, Net [Abstract]
Net Balance	$ 31,774	$ 35,330
Amortization of intangible assets	3,556	2,572
Expected annual amortization expense, 2022	3,100
Expected annual amortization expense, 2023	3,100
Expected annual amortization expense, 2024	3,100
Expected annual amortization expense, 2025	3,100
Expected annual amortization expense, 2026	3,100
Coal supply agreement
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	84,200	84,200
Accumulated Amortization	(52,426)	(48,870)
Net Balance	$ 31,774	$ 35,330

Asset Retirement Obligations (A

Asset Retirement Obligations (ARO Activity) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Carrying amount of the asset retirement obligations, balance at beginning of period	$ 41,732	$ 36,859
Liabilities incurred during the period		9,809
Liabilities settled during the period	(1,053)	(6,709)
Accretion expense	3,300	2,815
Revision of estimated cash flows	(28)	(1,042)
Carrying amount of the asset retirement obligations, balance at end of period	43,951	41,732
Operating Segments \| Coal Mining customer
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Carrying amount of the asset retirement obligations, balance at beginning of period	25,040	19,015
Liabilities incurred during the period		9,809
Liabilities settled during the period	(184)	(5,977)
Accretion expense	1,996	1,793
Revision of estimated cash flows	46	400
Carrying amount of the asset retirement obligations, balance at end of period	26,898	25,040
Operating Segments \| NAMining customer
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Carrying amount of the asset retirement obligations, balance at beginning of period	0	604
Liabilities incurred during the period		0
Liabilities settled during the period	0	0
Accretion expense	0	0
Revision of estimated cash flows	0	(604)
Carrying amount of the asset retirement obligations, balance at end of period	0	0
Unallocated Items
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Carrying amount of the asset retirement obligations, balance at beginning of period	16,692	17,240
Liabilities incurred during the period		0
Liabilities settled during the period	(869)	(732)
Accretion expense	1,304	1,022
Revision of estimated cash flows	(74)	(838)
Carrying amount of the asset retirement obligations, balance at end of period	$ 17,053	$ 16,692

Asset Retirement Obligations (D

Asset Retirement Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2019
Segment Reporting Information [Line Items]
Asset retirement obligation	$ 9,809
MLMC
Segment Reporting Information [Line Items]
Asset retirement obligation	9,800
Asset capitalized as a component of property, plant and equipment, net	9,800
Bellaire
Segment Reporting Information [Line Items]
Initial investment amount			$ 5,000
Fair value of trust assets	11,100	$ 12,300
Centennial
Segment Reporting Information [Line Items]
Increase (decrease) in asset retirement obligation	4,800
Escrow account	3,800
Settlement receivable from third parties	1,400
Other long-term liabilities, contingent and noncontingent guarantee liabilities	$ 2,400

Leases (Schedule of Leased Asse

Leases (Schedule of Leased Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization	Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization
Operating lease, assets	$ 8,911	$ 10,324
Finance lease, assets	$ 334	$ 1,478
Current liabilities
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other current liabilities	Other current liabilities
Operating lease liabilities, current	$ 1,463	$ 1,457
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Current portion of borrowings outstanding	Current portion of borrowings outstanding
Finance lease liabilities, current	$ 150	$ 1,188
Liabilities, Noncurrent
Operating lease liabilities, noncurrent	$ 9,733	$ 11,196
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-term portion of borrowings outstanding	Long-term portion of borrowings outstanding
Finance lease liabilities, noncurrent	$ 190	$ 280
Finance lease, right-of-use asset, accumulated amortization	$ 300	$ 200

Leases (Components of Lease Exp

Leases (Components of Lease Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease cost	$ 2,122	$ 2,103
Amortization of leased assets	220	164
Interest on lease liabilities	31	19
Variable lease expense	571	588
Short-term lease expense	1,176	260
Total lease expense	$ 4,120	$ 3,134

Leases (Future Minimum Lease Pa

Leases (Future Minimum Lease Payments) (Details) $ in Thousands	Dec. 31, 2021USD ($)
Finance Leases
2022	$ 161
2023	127
2024	63
2025	7
2026	0
Subsequent to 2026	0
Total minimum lease payments	358
Amounts representing interest	18
Present value of net minimum lease payments	340
Operating Leases
2022	2,181
2023	1,705
2024	1,661
2025	1,469
2026	1,501
Subsequent to 2026	6,451
Total minimum lease payments	14,968
Amounts representing interest	3,772
Present value of net minimum lease payments	11,196
Total
2022	2,342
2023	1,832
2024	1,724
2025	1,476
2026	1,501
Subsequent to 2026	6,451
Total minimum lease payments	$ 15,326

Leases (Assumptions Used in Acc

Leases (Assumptions Used in Accounting for Leases) (Details)	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease, weighted average remaining lease term (years)	8 years 4 months 17 days	8 years 11 months 1 day
Finance lease, weighted average remaining lease term (years)	2 years 5 months 8 days	1 year 4 months 17 days
Operating lease, weighted average discount rate	7.08%	7.00%
Finance lease, weighted average discount rate	4.16%	4.11%

Leases (Supplemental Cash Flow

Leases (Supplemental Cash Flow Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating cash flows from operating leases	$ 2,260	$ 2,223
Operating cash flows from finance leases	31	19
Financing cash flows from finance leases	$ 275	$ 623

Current and Long-Term Financi_3

Current and Long-Term Financing (Debt Schedule) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Current portion of borrowings outstanding	$ 2,527	$ 2,112
Long-term portion of borrowings outstanding	18,183	24,353
NACoal
Debt Instrument [Line Items]
Revolving credit agreement	4,000	30,000
Other debt	16,710	16,465
Total debt outstanding	20,710	46,465
Current portion of borrowings outstanding	2,527	22,112
Long-term portion of borrowings outstanding	18,183	24,353
Total available borrowings, net of limitations, under revolving credit agreement	120,231	146,951
Unused revolving credit agreement	$ 116,231	$ 116,951
Weighted average stated interest rate on total borrowings	3.70%	2.30%

Current and Long-Term Financi_4

Current and Long-Term Financing (Debt Maturity Schedule) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Disclosure [Abstract]
2022	$ 2,377
2023	2,460
2024	2,068
2025	5,175
2026	5,492
Thereafter	2,798
Long-term debt	$ 20,370	$ 45,000

Current and Long-Term Financi_5

Current and Long-Term Financing (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 15, 2026
Line of Credit Facility [Line Items]
Interest paid	$ 1,600,000	$ 1,400,000
Deferred financing fees	1,800,000
Outstanding notes payable	20,370,000	45,000,000
NACoal
Line of Credit Facility [Line Items]
Line of credit facility, amount outstanding	4,000,000	30,000,000
Line of credit facility, remaining borrowing capacity	116,231,000	116,951,000
Secured Debt \| NACoal
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	150,000,000
Line of credit facility, amount outstanding	4,000,000
Line of credit facility, remaining borrowing capacity	116,200,000
Amount of letters of credit outstanding	$ 29,800,000
Line of credit facility, unused capacity, commitment fee percentage	0.35%
Weighted average interest rate	4.50%
Fixed charge coverage ratio	1.10
Line of credit facility, availability required to pay dividends	$ 15,000,000
Secured Debt \| NACoal \| Maximum
Line of Credit Facility [Line Items]
Maximum debt to EBITDA ratio	2.75
Maximum EBITDA ratio	1.50
Secured Debt \| NACoal \| Minimum
Line of Credit Facility [Line Items]
Minimum interest coverage ratio	4
Maximum EBITDA ratio	1.50
Secured Debt \| NACoal \| Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.25%
Secured Debt \| NACoal \| LIBOR Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.25%
Secured Debt \| Demand Note Payable to Unconsolidated Subsidiary \| NACoal
Line of Credit Facility [Line Items]
Outstanding notes payable	$ 2,600,000	$ 4,400,000
Interest rate	0.18%	0.14%
Secured Debt \| Notes Payable, Maturing At Various Dates Through 2027 \| NACoal
Line of Credit Facility [Line Items]
Weighted average interest rate	4.03%
Outstanding notes payable	$ 13,800,000	$ 10,600,000
Secured Debt \| Forecast \| Notes Payable, Maturing December 2026 \| NACoal
Line of Credit Facility [Line Items]
Principal payment due at maturity			$ 4,400,000

Fair Value Disclosure (Schedule

Fair Value Disclosure (Schedule of Assets and Liabilities) (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Quoted prices in active markets for identical assets (level 1)
Assets:
Equity securities	$ 16,070	$ 13,164
Total assets accounted for at fair value on a recurring basis	16,070	13,164
Significant other observable inputs (level 2)
Assets:
Equity securities	0	0
Total assets accounted for at fair value on a recurring basis	0	0
Significant unobservable inputs (level 3)
Assets:
Equity securities	0	0
Total assets accounted for at fair value on a recurring basis	0	0
Estimate of Fair Value Measurement
Assets:
Equity securities	16,070	13,164
Total assets accounted for at fair value on a recurring basis	$ 16,070	$ 13,164

Fair Value Disclosure (Narrativ

Fair Value Disclosure (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain on equity securities	$ 3,423	$ 1,226
Long-term debt fair value	20,500	45,200
Long-term Debt	20,370	45,000
Mineral Management
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived asset write off		7,300
Coal Mining customer
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived asset write off		1,100
Level 1 \| Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain on equity securities	1,700	100
Level 1 \| Fair Value, Measurements, Recurring \| Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in equity securities		2,000
Level 1 \| Fair Value, Measurements, Recurring \| Bellaire
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain on equity securities	$ 1,700	$ 1,200

Stockholders' Equity and Earn_3

Stockholders' Equity and Earnings Per Share (Textual) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021voteshares	Dec. 31, 2020USD ($)shares	Nov. 10, 2021USD ($)
Class of Stock [Line Items]
Aggregate purchase price \| $		$ 1,002
2021 Stock Repurchase Program
Class of Stock [Line Items]
Authorized amount available for repurchase \| $			$ 20,000
2019 Stock Repurchase Program
Class of Stock [Line Items]
Aggregate purchase price \| $		$ 1,000
Class A Common Stock
Class of Stock [Line Items]
Votes per share \| vote	1
Common stock, shares authorized (in shares)	25,000,000
Treasury stock (in shares)	2,600,661	2,726,017
Class A Common Stock \| 2019 Stock Repurchase Program
Class of Stock [Line Items]
Treasury stock, shares acquired (in shares)		32,286
Class B Common Stock
Class of Stock [Line Items]
Votes per share \| vote	10
Common stock, shares authorized (in shares)	6,756,176

Stockholders' Equity and Earn_4

Stockholders' Equity and Earnings Per Share (Weighted Average Number of Shares Outstanding Reconciliation) (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Equity [Abstract]
Basic weighted average shares outstanding (in shares)	7,146	7,026
Dilutive effect of restricted stock awards (in shares)	44	31
Diluted weighted average shares outstanding (in shares)	7,190	7,057
Earnings per share:
Basic earnings per share (USD per share)	$ 6.73	$ 2.11
Diluted earnings per share (USD per share)	$ 6.69	$ 2.10

Income Taxes (Income Before Inc

Income Taxes (Income Before Income Taxes and Provision for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income (loss) before income tax provision (benefit)
Domestic	$ 57,019	$ 13,990
Foreign	(169)	268
Loss before income taxes	56,850	14,258
Current income tax provision (benefit):
Federal	10,870	(7,859)
State	1,443	(408)
Foreign	(35)	215
Total current	12,278	(8,052)
Deferred income tax (benefit) provision:
Federal	(4,449)	7,847
State	896	(330)
Total deferred	(3,553)	7,517
Income tax provision	$ 8,725	$ (535)

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income tax payments	$ 11,500	$ 400
Income tax refunds	2,600	4,200
Income tax provision (benefit)	8,725	(535)
Income before income taxes	$ 56,850	$ 14,258
Effective income tax rate	15.30%	(3.80%)
Discrete tax charges		$ 7,300
Discrete tax benefits		4,700
Gross unrecognized tax benefits	$ 6,400	6,300
Net benefit in interest and penalties related to uncertain tax positions	100	(100)
Interest and penalties accrued	$ 200	$ 100

Income Taxes (Reconciliation of

Income Taxes (Reconciliation of the Federal Statutory and Effective Income Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income before income tax provision	$ 56,850	$ 14,258
Statutory taxes at 21.0%	11,939	2,994
State and local income taxes	1,890	(626)
Non-deductible expenses	725	426
Percentage depletion	(6,245)	(3,744)
R&D and other federal credits	(363)	(367)
Settlements and uncertain tax positions	166	6,286
Coronavirus Aid, Relief, and Economic Security ("CARES") Act - carryback rate differential	0	(4,741)
Other, net	613	(763)
Income tax provision	$ 8,725	$ (535)
Effective income tax rate	15.30%	(3.80%)

Income Taxes (Summary of the To

Income Taxes (Summary of the Total Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets
Lease liabilities	$ 24,500	$ 27,800
Tax carryforwards	13,837	17,756
Inventories	4,522	3,742
Accrued liabilities	9,243	10,160
Employee benefits	3,496	2,747
Land valuation adjustment	5,988	5,536
Other	6,527	5,401
Total deferred tax assets	68,113	73,142
Less: Valuation allowance	11,695	11,549
Deferred tax assets, net of valuation allowance	56,418	61,593
Deferred tax liabilities
Lease right-of-use assets	24,500	27,800
Depreciation and depletion	25,851	31,972
Partnership investment - development costs	9,840	11,686
Accrued pension benefits	10,941	7,685
Total deferred tax liabilities	71,132	79,143
Net deferred liability	$ (14,714)	$ (17,550)

Income Taxes (Summary of Operat

Income Taxes (Summary of Operating Loss Carryforwards and Tax Credit Carryforwards) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Operating Loss Carryforwards [Line Items]
Net deferred tax asset, net operating loss	$ 13,837	$ 17,756
Total net deferred tax asset		21,356
Total valuation allowance		14,478
State and local jurisdiction
Operating Loss Carryforwards [Line Items]
Net deferred tax asset, net operating loss	17,516	18,708
Valuation allowance, net operating loss	$ 14,694	14,478
Federal tax authority
Operating Loss Carryforwards [Line Items]
Net deferred tax asset, tax credit carryforwards, research		2,648
Valuation allowance, tax credit		$ 0

Income Taxes (Gross Unrecognize

Income Taxes (Gross Unrecognized Tax Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Balance at beginning of period	$ 10,459	$ 2,860
Additions based on tax positions related to prior years	95	2,774
Decreases based on settlements with tax authorities	0	(803)
Additions based on tax positions related to the current year	0	5,628
Balance at end of period	$ 10,554	$ 10,459

Retirement Benefit Plans (Assum

Retirement Benefit Plans (Assumptions Used in Accounting for Defined Benefit Plans) (Details) - Pension Plan	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on assets for net periodic benefit cost	7.00%	7.00%
Minimum
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rates for pension benefit obligation	2.53%	2.02%
Weighted average discount rates for net periodic benefit cost	2.02%	2.98%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rates for pension benefit obligation	2.77%	2.36%
Weighted average discount rates for net periodic benefit cost	2.36%	3.20%

Retirement Benefit Plans (Net P

Retirement Benefit Plans (Net Periodic Benefit Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 1,002	$ 1,285
Expected return on plan assets	(2,568)	(2,435)
Amortization of actuarial loss (gain)	718	597
Amortization of prior service cost	59	58
Net periodic pension income	(789)	(495)
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	13	21
Interest cost	27	52
Amortization of actuarial loss (gain)	19	(1)
Amortization of prior service cost	(54)	(59)
Amortization of curtailment	0	(31)
Net periodic pension income	$ 5	$ (18)

Retirement Benefit Plans (Other

Retirement Benefit Plans (Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Loss (Income)) (Details) - Pension Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial (gain) loss	$ (3,793)	$ 667
Amortization of actuarial loss	(718)	(597)
Amortization of prior service cost	(59)	(58)
Total recognized in other comprehensive (income) loss	$ (4,570)	$ 12

Retirement Benefit Plans (Oblig

Retirement Benefit Plans (Obligation and Funded Status) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Amounts recognized in the balance sheets consist of:
Non-current liabilities	$ (6,605)	$ (8,838)
Pension Plan
Change in benefit obligation
Projected benefit obligation at beginning of year	44,600	41,854
Interest cost	1,002	1,285
Actuarial (gain) loss	(1,367)	3,996
Benefits paid	(2,572)	(2,535)
Projected benefit obligation at end of year	41,663	44,600
Accumulated benefit obligation at end of year	41,663	44,600
Change in plan assets
Fair value of plan assets at beginning of year	41,099	37,364
Actual return on plan assets	4,995	5,763
Employer contributions	487	507
Benefits paid	(2,572)	(2,535)
Fair value of plan assets at end of year	44,009	41,099
Funded status at end of year	2,346	(3,501)
Amounts recognized in the balance sheets consist of:
Non-current assets	7,806	4,070
Current liabilities	(542)	(549)
Non-current liabilities	(4,918)	(7,022)
Amount recognized in the balance sheets	2,346	(3,501)
Components of accumulated other comprehensive loss consist of:
Actuarial loss	9,510	14,022
Prior service cost	703	761
Deferred taxes	(2,254)	(3,316)
Accumulated other comprehensive (loss) income	7,959	11,467
Other Postretirement Benefits Plan
Change in benefit obligation
Projected benefit obligation at beginning of year	2,054	2,049
Service cost	13	21
Interest cost	27	52
Plan amendments	0	49
Actuarial (gain) loss	(48)	145
Benefits paid	(169)	(262)
Projected benefit obligation at end of year	1,877	2,054
Change in plan assets
Funded status at end of year	(1,877)	(2,054)
Amounts recognized in the balance sheets consist of:
Current liabilities	(190)	(238)
Non-current liabilities	(1,687)	(1,816)
Amount recognized in the balance sheets	(1,877)	(2,054)
Components of accumulated other comprehensive loss consist of:
Actuarial loss	520	466
Prior service cost	(108)	(167)
Deferred taxes	(195)	(167)
Accumulated other comprehensive (loss) income	$ 217	$ 132

Retirement Benefit Plans (Sched

Retirement Benefit Plans (Schedule of Expected Benefit Payments) (Details) $ in Thousands	Dec. 31, 2021USD ($)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
2022	$ 2,710
2023	2,697
2024	2,716
2025	2,684
2026	2,672
2027 - 2031	12,779
Total	26,258
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
2022	191
2023	191
2024	182
2025	176
2026	169
2027 - 2031	700
Total	$ 1,609

Retirement Benefit Plans (Actua

Retirement Benefit Plans (Actual Allocation Percentage and Target Allocation Percentage for the U.S. Pension Plan Assets) (Details) - Pension Plan	Dec. 31, 2021	Dec. 31, 2020
U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation	48.70%	45.40%
Non-U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation	19.70%	20.30%
Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation	31.20%	33.90%
Money market
Defined Benefit Plan Disclosure [Line Items]
Actual allocation	0.40%	0.40%
Minimum \| U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	36.00%
Minimum \| Non-U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	16.00%
Minimum \| Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	30.00%
Minimum \| Money market
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	0.00%
Maximum \| U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	54.00%
Maximum \| Non-U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	24.00%
Maximum \| Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	40.00%
Maximum \| Money market
Defined Benefit Plan Disclosure [Line Items]
Actual allocation percentage	10.00%

Retirement Benefit Plans (Fair

Retirement Benefit Plans (Fair Value Hierarchy) (Details) - Pension Plan - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Fair value of each major category of U.S. plan assets	$ 44,009	$ 41,099	$ 37,364
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of each major category of U.S. plan assets	44,009	41,099
Level 1 \| U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of each major category of U.S. plan assets	21,434	18,640
Level 1 \| Non-U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of each major category of U.S. plan assets	8,678	8,335
Level 1 \| Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of each major category of U.S. plan assets	13,723	13,948
Level 1 \| Money market
Defined Benefit Plan Disclosure [Line Items]
Fair value of each major category of U.S. plan assets	$ 174	$ 176

Retirement Benefit Plans (Ass_2

Retirement Benefit Plans (Assumptions Used in Accounting for Postretirement Benefit Plans) (Details) - Other Postretirement Benefits Plan	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted average discount rates for pension benefit obligation	2.12%	1.37%
Weighted average discount rates for net periodic benefit cost	1.37%
Health care cost trend rate assumed for next year	6.50%	6.25%
Rate to which the cost trend rate is assumed to decline (ultimate trend rate)	4.50%	5.00%
Year that the rate reaches the ultimate trend rate	2029	2027
Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted average discount rates for net periodic benefit cost		1.37%
Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Weighted average discount rates for net periodic benefit cost		2.65%

Retirement Benefit Plans (Oth_2

Retirement Benefit Plans (Other Changes in Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income) (Details) - Other Postretirement Benefits Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Current year actuarial (gain) loss	$ (48)	$ 194
Amortization of actuarial (loss) gain	(19)	1
Amortization of prior service credit	54	59
Amortization of curtailment	0	31
Transfers	126	46
Total recognized in other comprehensive (income) loss	$ 113	$ 331

Retirement Benefit Plans (Narra

Retirement Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Retirement Benefits [Abstract]
Defined contribution plan, total costs	$ 2.9	$ 2.8

Business Segments (Concentratio

Business Segments (Concentration Risk) (Details) - Percentage of Consolidated Revenue - Customer concentration risk	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Coal Mining customer \| Coal Mining customer
Segment Reporting Information [Line Items]
Percentage of Consolidated Revenue	43.00%	55.00%
NAMining customer \| NAMining customer
Segment Reporting Information [Line Items]
Percentage of Consolidated Revenue	19.00%	19.00%

Business Segments (Textual) (De

Business Segments (Textual) (Details)	12 Months Ended
Business Segments (Textual) (Details)	Dec. 31, 2021
Coal Mining customer \| Customer concentration risk \| Earnings of Unconsolidated Mines \| Top Two Customers - Basin Electric and GRE
Segment Reporting Information [Line Items]
Revenue from major customer, percentage	68.00%

Business Segments (Details)

Business Segments (Details) - USD ($) $ in Thousands	12 Months Ended
Business Segments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenues	$ 191,846	$ 128,432
Operating profit (loss)	55,410	13,448
Expenditures for property, plant and equipment and acquisition of mineral interests	44,561	44,368
Depreciation, depletion and amortization	23,085	18,114
Operating Segments \| Coal Mining customer
Segment Reporting Information [Line Items]
Revenues	91,851	72,088
Operating profit (loss)	49,059	25,436
Expenditures for property, plant and equipment and acquisition of mineral interests	16,830	14,825
Depreciation, depletion and amortization	16,649	14,213
Operating Segments \| NAMining customer
Segment Reporting Information [Line Items]
Revenues	69,924	42,392
Operating profit (loss)	109	1,872
Expenditures for property, plant and equipment and acquisition of mineral interests	21,100	13,862
Depreciation, depletion and amortization	4,435	2,470
Operating Segments \| Minerals Management
Segment Reporting Information [Line Items]
Revenues	31,003	14,721
Operating profit (loss)	26,080	3,493
Expenditures for property, plant and equipment and acquisition of mineral interests	6,423	15,474
Depreciation, depletion and amortization	1,858	1,308
Unallocated Items
Segment Reporting Information [Line Items]
Revenues	4,695	2,133
Operating profit (loss)	(19,553)	(17,256)
Expenditures for property, plant and equipment and acquisition of mineral interests	208	207
Depreciation, depletion and amortization	143	123
Eliminations
Segment Reporting Information [Line Items]
Revenues	(5,627)	(2,902)
Operating profit (loss)	$ (285)	$ (97)

Parent Company Condensed Bala_3

Parent Company Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Cash and cash equivalents	$ 86,005	$ 88,450
Accounts receivable from affiliates	5,605	4,764
Other current assets	14,621	8,308
Other non-current assets	51,225	40,984
Total assets	507,220	476,179
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities	46,016	52,257
Other non-current liabilities	7,531	12,060
Stockholders’ equity	352,116	300,624	$ 289,392
Total liabilities and equity	507,220	476,179
Parent Company
ASSETS
Cash and cash equivalents	83,093	85,365
Accounts receivable from affiliates	0	495
Other current assets	17,578	20,648
Investment in subsidiaries	268,720	211,468
Property, plant and equipment, net	57	110
Other non-current assets	4,885	5,890
Total assets	374,333	323,976
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities	3,865	3,242
Current intercompany accounts payable, net	637	2,337
Other non-current liabilities	965	1,023
Stockholders’ equity	352,116	300,624
Total liabilities and equity	374,333	323,976
Restricted investments	1,800
Unrestricted investment	1,200
Parent Company \| Bellaire
LIABILITIES AND STOCKHOLDERS’ EQUITY
Note payable to Bellaire	$ 16,750	$ 16,750

Unconsolidated Subsidiaries (De

Unconsolidated Subsidiaries (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated subsidiaries	$ 19,090	$ 28,978
Statement of Operations
Revenues	191,846	128,432
Gross profit	43,452	16,969
Income before income taxes	56,850	14,258
Net income	48,125	14,793
Balance Sheet
Current assets	203,053	188,146
Current liabilities	46,016	52,257
Unconsolidated mines \| NACoal
Schedule of Equity Method Investments [Line Items]
Investment in unconsolidated subsidiaries	19,100	29,000
Maximum risk of loss	7,600	6,500
Balance Sheet
Dividends from unconsolidated mines	51,700	49,700
Unconsolidated mines \| NACoal \| Variable Interest Entity, Not Primary Beneficiary
Statement of Operations
Revenues	764,759	768,660
Gross profit	68,076	69,021
Income before income taxes	60,865	60,398
Net income	53,248	50,933
Balance Sheet
Current assets	168,669	186,934
Assets, Noncurrent	900,924	959,032
Current liabilities	98,887	143,843
Non-current liabilities	$ 963,128	$ 995,658

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Jones Day
Related Party Transaction [Line Items]
Legal services	$ 1.2	$ 1
Mr. Rankin
Related Party Transaction [Line Items]
Legal services	$ 0.5	$ 0.5

Other Events and Transactions (

Other Events and Transactions (Details) $ in Millions	3 Months Ended
Other Events and Transactions (Details) $ in Millions	Dec. 31, 2020USD ($)
Other Events And Transactions [Abstract]
General and administrative charges	$ 1.8

Supplemental Oil and Gas Disc_3

Supplemental Oil and Gas Disclosures (Unaudited) (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021USD ($)a	Dec. 31, 2020USD ($)a
Oil and Gas, Acreage [Line Items]
Acquisition of mineral and royalty interest \| $	$ 5,331	$ 14,181
Gross acreage	20,600	65,500
Net acreage	1,800	1,200
Mineral and Royalty Interest
Oil and Gas, Acreage [Line Items]
Gross acreage	127,800
Net acreage	59,900

Supplemental Oil and Gas Disc_4

Supplemental Oil and Gas Disclosures (Unaudited) (Oil and Natural Gas Properties) (Details) $ in Thousands	Dec. 31, 2021USD ($)
Extractive Industries [Abstract]
Proved developed	$ 3,266
Proved undeveloped	16,246
Less: accumulated depreciation, depletion and amortization	868
Net royalty interests in oil and natural gas properties	$ 18,644

Supplemental Oil and Gas Disc_5

Supplemental Oil and Gas Disclosures (Unaudited) (Developed and Undeveloped Reserves) (Details)	Dec. 31, 2021bblMcf
Oil (bbl)
Reserve Quantities [Line Items]
Proved developed	167,430
Proved undeveloped	220
Total	167,650
NGL (bbl)
Reserve Quantities [Line Items]
Proved developed	282,230
Proved undeveloped	90
Total	282,320
Residue gas (Mcf)
Reserve Quantities [Line Items]
Proved developed \| Mcf	16,617,360
Proved undeveloped \| Mcf	1,210
Total \| Mcf	16,618,570

Supplemental Oil and Gas Disc_6

Supplemental Oil and Gas Disclosures (Unaudited) (Future Net Cash Flows From Proved Oil and Gas Reserves) (Details) $ in Thousands	Dec. 31, 2021USD ($)
Gross Amounts
Future cash inflows	$ 71,400
Future production costs	14,664
Future net cash flows before income tax expense	56,736
10% discount to reflect timing of cash flows	(19,897)
Standardized measure of discounted cash flows	36,839
Net Amounts
Future net cash flows before income tax expense	44,821
10% discount to reflect timing of cash flows	(15,719)
Standardized measure of discounted cash flows	$ 29,102

Schedule I - Condensed Financ_2

Schedule I - Condensed Financial Information of the Parent (Condensed Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Cash and cash equivalents	$ 86,005	$ 88,450
Accounts receivable from affiliates	5,605	4,764
Other current assets	14,621	8,308
Other non-current assets	51,225	40,984
Total assets	507,220	476,179
LIABILITIES AND EQUITY
Current liabilities	46,016	52,257
Other long-term liabilities	7,531	12,060
Stockholders’ equity	352,116	300,624	$ 289,392
Total liabilities and equity	507,220	476,179
Parent Company
ASSETS
Cash and cash equivalents	83,093	85,365
Accounts receivable from affiliates	0	495
Other current assets	17,578	20,648
Investment in subsidiaries	268,720	211,468
Property, plant and equipment, net	57	110
Other non-current assets	4,885	5,890
Total assets	374,333	323,976
LIABILITIES AND EQUITY
Current liabilities	3,865	3,242
Current intercompany accounts payable, net	637	2,337
Other long-term liabilities	965	1,023
Stockholders’ equity	352,116	300,624
Total liabilities and equity	374,333	323,976
Parent Company \| Bellaire
LIABILITIES AND EQUITY
Note payable to Bellaire	$ 16,750	$ 16,750

Schedule I - Condensed Financ_3

Schedule I - Condensed Financial Information of the Parent (Condensed Statements of Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]
Other, net	$ (584)	$ (1,379)
Other (income) expense	(1,440)	(810)
Administrative and general expenses	55,722	53,062
Loss before income taxes	56,850	14,258
Income tax (benefit) provision	8,725	(535)
Net income	48,125	14,793
Current period pension and postretirement plan adjustment, net of $864 tax expense and $213 tax benefit in 2021 and 2020, respectively	2,851	(697)
Reclassification of pension and postretirement adjustments into earnings, net of $170 and $129 tax benefit in 2021 and 2020, respectively	572	435
Total other comprehensive income	3,423	(262)
Comprehensive income	51,548	14,531
Current period pension and postretirement plan adjustment, tax (benefit) expense	864	(213)
Reclassification of pension and post retirement adjustments into earnings, tax benefit	170	129
Parent Company
Condensed Financial Statements, Captions [Line Items]
Intercompany interest expense	1,172	1,178
Other, net	(336)	(1,003)
Other (income) expense	836	175
Administrative and general expenses	4,300	5,658
Loss before income taxes	(5,136)	(5,833)
Income tax (benefit) provision	(463)	2,419
Net loss before equity in earnings of subsidiaries	(4,673)	(8,252)
Equity in earnings of subsidiaries	(52,798)	(23,045)
Net income	48,125	14,793
Current period pension and postretirement plan adjustment, net of $864 tax expense and $213 tax benefit in 2021 and 2020, respectively	2,851	(697)
Reclassification of pension and postretirement adjustments into earnings, net of $170 and $129 tax benefit in 2021 and 2020, respectively	572	435
Total other comprehensive income	3,423	(262)
Comprehensive income	51,548	14,531
Current period pension and postretirement plan adjustment, tax (benefit) expense	864	(213)
Reclassification of pension and post retirement adjustments into earnings, tax benefit	$ 170	$ 129

Schedule I - Condensed Financ_4

Schedule I - Condensed Financial Information of the Parent (Condensed Statements of Cash Flows) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating Activities
Net cash provided by (used for) operating activities	$ 74,875	$ (2,486)
Investing Activities
Net cash used for investing activities	(44,147)	(45,984)
Financing Activities
Purchase of treasury shares	0	(1,002)
Cash dividends paid	(5,617)	(5,375)
Net cash (used for) provided by financing activities	(33,173)	14,028
Cash and Cash Equivalents
Total decrease for the year	(2,445)	(34,442)
Balance at the beginning of the year	88,450	122,892
Balance at the end of the year	86,005	88,450
Parent Company
Operating Activities
Net income	48,125	14,793
Equity in earnings of subsidiaries	52,798	23,045
Net loss before equity in earnings of subsidiaries	(4,673)	(8,252)
Net changes related to operating activities	8,018	(22,822)
Net cash provided by (used for) operating activities	3,345	(31,074)
Investing Activities
Net cash used for investing activities	0	0
Financing Activities
Dividends received from subsidiaries	0	3,000
Notes payable to Bellaire	0	(200)
Purchase of treasury shares	0	(1,002)
Cash dividends paid	(5,617)	(5,375)
Net cash (used for) provided by financing activities	(5,617)	(3,577)
Cash and Cash Equivalents
Total decrease for the year	(2,272)	(34,651)
Balance at the beginning of the year	85,365	120,016
Balance at the end of the year	$ 83,093	$ 85,365

Schedule I - Condensed Financ_5

Schedule I - Condensed Financial Information of the Parent (Textual) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 86,005	$ 88,450
Parent Company
Condensed Financial Statements, Captions [Line Items]
Unrestricted investment	1,200
Cash and cash equivalents	$ 83,093	$ 85,365

Schedule II - Valuation and Q_2

Schedule II - Valuation and Qualifying Accounts (Details) - Deferred tax valuation allowances - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Valuation allowances and reserves [Roll Forward]
Balance at Beginning of Period	$ 11,549	$ 12,296
Charged to Costs and Expenses	146	(747)
Charged to Other Accounts — Describe	0	0
Deductions — Describe	0	0
Balance at End of Period	$ 11,695	$ 11,549