Discontinued Operations (Details) - USD ($) $ in Thousands	2 Months Ended	3 Months Ended							8 Months Ended	12 Months Ended
	Mar. 01, 2017	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Intercompany Sales between Continuing and Discontinued Operations	$ 8,000										$ 29,000
Fixed asset impairment related to sale of business											21,000
Disposal Group, Including Discontinued Operation, Revenue										$ 111,130	498,233
Disposal Group, Including Discontinued Operation, Costs of Goods Sold										100,084	424,161
Disposal Group, Including Discontinued Operation, Operating Expense										8,369	22,330
Impairment on net assets of discontinued operations										0	26,677
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation					$ 4,000						7,000
Disposal Groups, including Discontinued Operations, Operating income										2,677	25,065
Disposal Group, Including Discontinued Operation, Other Expense										1,204	(9,136)
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax										3,881	15,929
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation										3,598	8,252
disposal group, including discontinued operation, equity in earnings										(534)	175
IncomeLossFromDiscontinuedOperationsExcludingLossonSaleNetOfTaxAttributableToReportingEntity										(251)
Net (loss) income from discontinued operations		$ (2,215)	$ 0	$ 0	(4,531)	$ (9,967)	$ 12,844	$ 4,975		(6,746)	7,852	$ 0
Valuation allowance due to sale of business						6,000			$ 6,000		6,000
Interest Allocated to Discontinued Operations										2,000	6,000
disposal group, including discontinued operation tax expense										(46,537)	(11,646)	22,388
Capital Expenditures										179,090	207,074	170,490
Investments in unconsolidated subsidiaries										(7,664)
Cash Provided by (Used in) Operating Activities, Discontinued Operations									64,000	(4,000)
Cash Provided by (Used in) Investing Activities, Discontinued Operations									(29,000)	(4,000)
Loss on sale of business		$ 2,000			$ 4,000					(6,495)	0	$ 0
OEM [Member]
Valuation allowance due to sale of business						$ (5,598)			$ (5,598)		(5,598)
Discontinued Operations
Disposal Group, Including Discontinued Operation, Depreciation and Amortization										0	7,752
Impairment on net assets of discontinued operations										0	26,677
disposal group, including discontinued operation tax expense										0	(4,516)
Capital Expenditures										3,598	24,156
Investments in unconsolidated subsidiaries										$ 0	$ (4,400)