Unconsolidated Subsidiaries (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Schedule of Equity Method Investments [Line Items]
Variable interest entity, reporting entity involvement, maximum risk of loss	$ 6,700	$ 5,500
Other non-current assets
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 14,800	14,100
Unconsolidated Subsidiaries
Schedule of Equity Method Investments [Line Items]
Ownership (percent)	100.00%
Equity method investments	$ 14,750	14,137
Unconsolidated Mines | NACCO Natural Resources
Schedule of Equity Method Investments [Line Items]
Return of equity method investment	$ 51,500	$ 48,800