CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Current assets
Cash and cash equivalents	$ 72,833	$ 85,109
Inventories	94,608	77,000
Assets held for sale	14,159	6,466
Other current assets	27,639	18,134
Total current assets	264,738	231,998
Property, plant and equipment, net	259,457	223,902
Intangibles, net	5,475	6,006
Deferred income taxes	14,641	15,081
Operating lease right-of-use assets	9,661	8,667
Equity securities	18,663	17,208
Other non-current assets	25,768	21,675
Total assets	631,687	539,708
Current liabilities
Revolving credit agreements	0	10,000
Current maturities of long-term debt	4,179	3,953
Asset retirement obligations	9,747	13,114
Accrued payroll	22,663	17,317
Other current liabilities	8,752	7,996
Total current liabilities	64,888	69,986
Long-term debt	25,335	22,003
Long-term revolving credit agreement	70,000	0
Operating lease liabilities	9,042	8,782
Asset retirement obligations	39,780	39,499
Pension and other postretirement obligations	4,787	5,183
Liability for uncertain tax positions	794	5,795
Other long-term liabilities	12,114	6,120
Total liabilities	226,740	157,368
Common stock:
Capital in excess of par value	34,340	28,672
Retained earnings	373,363	355,873
Accumulated other comprehensive loss	(10,052)	(9,654)
Total stockholders’ equity	404,947	382,340
Total liabilities and equity	631,687	539,708
Unconsolidated Subsidiaries
Current assets
Investments in unconsolidated subsidiaries	14,137	12,371
Equity method investment in Eiger, LLC	14,137	12,371
Eiger, LLC
Current assets
Investments in unconsolidated subsidiaries	19,147	2,800
Equity method investment in Eiger, LLC	19,147	2,800
Nonrelated Party
Current assets
Trade accounts receivable and accounts receivable from affiliates	49,706	37,429
Current liabilities
Accounts payable and accounts payable to affiliates	17,721	16,702
Affiliated Entity
Current assets
Trade accounts receivable and accounts receivable from affiliates	5,793	7,860
Current liabilities
Accounts payable and accounts payable to affiliates	1,826	904
Class A Common Stock
Common stock:
Common stock	5,730	5,883
Class B Common Stock
Common stock:
Common stock	$ 1,566	$ 1,566

Long-Term Debt And Lease Obligation, Excluding Long Term Line Of Credit

No definition available.

Name:	nacco_LongTermDebtAndLeaseObligationExcludingLongTermLineOfCredit
Namespace Prefix:	nacco_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).