Discontinued Operations Results of Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss on dispositions of assets	$ (1,290)	$ (150)	$ (90)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	$ 0	36,680	9,590
Discontinued Operations, Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Revenue		182,590	172,110
Disposal Group, Including Discontinued Operation, Costs of Goods Sold		(138,100)	(128,100)
Disposal Group, Including Discontinued Operation, Gross Profit (Loss)		44,490	44,010
Disposal Group, Including Discontinued Operations, SG&A		(32,920)	(30,590)
Net loss on dispositions of assets		38,900	(160)
Disposal Group, Including Discontinued Operation, Operating Income (Loss)		50,470	13,260
Disposal Group, Including Discontinued Operations, Other Expense, net		(30)	360
Disposal Group, Including Discontinued Operations, Nonoperating Expense		(30)	360
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax		50,440	13,620
Discontinued Operation, Tax Effect of Discontinued Operation		(13,760)	(4,030)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent		$ 36,680	$ 9,590