Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Accounts receivable allowances
Inventories		1,900
Compensation and employee benefits	300	1,500
Tax credit carryforwards	22,200	23,900
Net operating loss carryforwards	167,100	190,900
Accrued liabilities and other reserves	200	2,100
Pension	6,800	6,700
Property, plant and equipment		(100)
Intangible assets, net	2,500	300
Capital losses	9,500	9,400
Other, net	44,400	1,300
Total deferred tax assets	253,000	237,900
Valuation allowance	(253,000)	(237,900)
Net deferred tax assets
Intangible assets, net
Unremitted earnings of foreign subsidiaries	(500)	(1,000)
Total deferred tax liabilities	(500)	(1,000)
Valuation allowance
Total deferred tax liabilities	(500)	(1,000)
Net deferred tax liabilities	$ (500)	$ (1,000)