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Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2018
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:
 
 
NACCO
Consolidated
Balance at January 1, 2017
 
$
42,105

Liabilities incurred during the period
 
277

Liabilities settled during the period
 
(2,430
)
Accretion expense
 
2,749

Revision of estimated cash flows
 
(2,604
)
Balance at December 31, 2017
 
$
40,097

Liabilities incurred during the period
 
189

Liabilities settled during the period
 
(1,667
)
Accretion expense
 
2,579

Revision of estimated cash flows
 
(3,495
)
Balance at December 31, 2018
 
$
37,703