Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2020

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 Consolidated
Balance at January 1, 2019	$	20,396	$	485	$	16,822	$	37,703
Liabilities incurred during the period	—		91		—		91
Liabilities settled during the period	(8,265)		—		(752)		(9,017)
Accretion expense	1,260		28		1,323		2,611
Revision of estimated cash flows	5,624		—		(153)		5,471
Balance at December 31, 2019	$	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