Other Events and Transactions (Discontinued Operation Results) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax benefit	$ 0	$ 1,071
Loss from discontinued operations	$ 0	(3,242)
Spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations		(3,242)
Spinoff | HBBHC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues		140,282
Cost of goods sold		105,705
Gross profit		34,577
Operating expenses		37,015
Operating loss		(2,438)
Interest expense		415
Other income, net		(682)
Loss before income taxes		(2,171)
Income tax benefit		(814)
HBBHC net loss		(1,357)
NACCO discontinued operations income tax expense adjustment		$ 1,885