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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On February 14, 2018, NACCO's Board of Directors approved the termination of certain nonqualified deferred compensation plans. The account balance of $13.0 million as of December 31, 2017, which is included in NACCO and Other's long-term liabilities on the line "Deferred compensation" in the Consolidated Balance Sheets, will be distributed between February 2019 and February 2020.