Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended			16 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020	Aug. 26, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Consideration					$ 700,000
Costs of Transition Services Agreement	$ 12,515	$ 4,673	$ 0
Income from transition services agreement	(8,439)	(3,673)	0
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents	0	21,834	1,816	$ 0
Accumulated Depreciation, Depletion and Amortization, Sale or Disposal of Property, Plant and Equipment					73,795
Disposal Group, Including Discontinued Operation, Assets	1,306,393	1,418,943		1,306,393
Disposal Group, Including Discontinued Operation, Liabilities, Current	18,086	0		18,086
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax	0	29,027	38,292
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	692	124,356	0
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	692	153,383	38,292
Proceeds from Divestiture of Businesses	5,223	655,030	0
Impairment of Long-Lived Assets to be Disposed of	(36,285)	0	0
Asset Impairment Charges	24,300
Other Asset Impairment Charges	12,000
Distribution [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Consideration					700,000
Costs of Transition Services Agreement	12,500	4,700		17,200
Income from transition services agreement	(8,400)	3,700		(12,100)
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents					21,834
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net					150,317
Disposal Group, Including Discontinued Operations, Contract with Customer Asset Net					9,128
Disposal Group, Including Discontinued Operation, Inventory					163,995
Disposal Group, Including Discontinued Operation, Other Assets, Current					20,289
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment					51,039
Disposal Group, Including Discontinued Operation, Operating Lease, Right-of-Use Asset					68,049
Disposal Group, Including Discontinued Operation, Goodwill					149,204
Disposal Group, Including Discontinued Operation, Intangible Assets					28,361
Disposal Group, Including Discontinued Operation, Deferred Tax Assets					133
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent					195
Disposal Group, Including Discontinued Operation, Assets					662,544
Disposal Group, Including Discontinued Operation, Accounts Payable					67,975
Disposal Group, Including Discontinued Operations, Employee-Related Liabilities					12,916
Disposal Group, Including Discontinued Operation, Operating Lease, Liability, Current					19,981
Disposal Group, Including Discontinued Operation, Other Liabilities, Current					22,024
Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities					78
Disposal Group, Including Discontinued Operation, Operating Lease, Lease Liability, Noncurrent					48,130
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent					188
Disposal Group, Including Discontinued Operation, Liabilities					$ 171,292
Costs Associated with Disposal Activity				33,400
Disposal Group, Including Discontinued Operation, Revenue	0	748,451	1,139,431
Disposal Group, Including Discontinued Operation, Costs of Goods Sold	0	536,749	816,711
Disposal Group, Including Discontinued Operation, Gross Profit (Loss)	0	211,702	322,720
Disposal Group, Including Discontinued Operation, General and Administrative Expense	0	177,475	272,633
Disposal Group, Including Discontinued Operation, Restructuring Costs	0	0	655
Disposal Group, Including Discontinued Operation, Gain Loss on Disposition of Other Assets	0	8	(669)
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	0	34,219	50,101
Disposal Group, Including Discontinued Operation, Interest Expense	0	25	51
Disposal Group, Including Discontinued Operation, Other Income	0	(12)	(51)
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	0	34,206	50,101
Discontinued Operation, Tax Effect of Discontinued Operation	0	5,179	11,809
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax	0	29,027	38,292
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	925	167,757	0	168,682
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation	233	43,401	0
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax	692	124,356	0
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	692	153,383	$ 38,292
Proceeds from Sale of Discontinued Operations, Net of Transaction Costs and Working Capital Adjustments				659,934
Proceeds from Divestiture of Businesses	5,200
U.K. Composites [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Consideration	3,600			3,600
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents	6,600			6,600
Disposal Group, Including Discontinued Operation, Assets	24,284			24,284
Disposal Group, Including Discontinued Operation, Accounts Payable	2,977			2,977
Disposal Group, Including Discontinued Operations, Employee-Related Liabilities	140			140
Disposal Group, Including Discontinued Operation, Operating Lease, Liability, Current	496			496
Disposal Group, Including Discontinued Operations, Contract Liabilities, Current	1,212			1,212
Disposal Group, Including Discontinued Operation, Other Liabilities, Current	13,261			13,261
Disposal Group, Including Discontinued Operation, Liabilities, Current	18,086			18,086
Disposal Group, Including Discontinued Operation, Operating Lease, Lease Liability, Noncurrent	912			912
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent	259			259
Disposal Group, Including Discontinued Operation, Liabilities	7,255			7,255
Disposal Group, Including Discontinued Operation, Liabilities	19,257			19,257
Disposal Group, Including Discontinued Operations, Net Assets	17,029			17,029
Asset Impairment Charges	24,300
Other Asset Impairment Charges	12,000
Impairment on Assets Held for Sale above Net Book Value of Business	12,000
Translation Adjustment Functional to Reporting Currency, Gain (Loss), Reclassified to Earnings, Net of Tax	22,856
Cash Outflows [Member] | Distribution [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Amount of Continuing Cash Flows after Disposal	300	7,800		8,100
Cash Inflows [Member] | Distribution [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Amount of Continuing Cash Flows after Disposal	$ 13,300	$ 3,600		$ 16,900