Divestiture (Details) - USD ($) $ in Thousands		12 Months Ended
	Apr. 01, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses	$ 265,000	$ 243,362	$ 0	$ 0
Gain (Loss) on Disposition of Business		191,571	0	$ 0
Accounts Receivable, net			35,498
Tooling receivable			3,797
Inventories			13,774
Prepaid expenses			1,759
Other current assets			1,197
Property, plant and equipment, net			31,148
Goodwill			13,500
Other assets			3,225
Assets held for sale		0	103,898
Accounts Payable			38,065
Payroll liabilities			6,826
Accrued liabilities			1,000
Pension benefits			15,894
Postretirement benefits other than pensions			9,281
Other liabilities			129
Liabilities held for sale		$ 0	$ 71,195
Minimum [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses	215,000
Maximum [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses	$ 220,000