Other Events and Transactions (Discontinued Operation Results) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense (benefit)		$ 2,443		$ 3,514
Loss from discontinued operations	$ 0	(444)	$ 0	(3,686)
Spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations		(444)		(3,686)
Spinoff | HBBHC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues		152,976		293,258
Cost of goods sold		114,145		219,850
Gross profit		38,831		73,408
Operating expenses		36,667		73,682
Operating profit (loss)		2,164		(274)
Interest expense		462		877
Other income, net		(297)		(979)
Income (loss) before income taxes		1,999		(172)
Income tax expense (benefit)		760		(53)
HBBHC net income (loss)		1,239		(119)
NACCO discontinued operations income tax expense adjustment		$ 1,683		$ 3,567