Taxes (Details 4) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Inventory	$ 15,078	$ 13,779
Accrued and other liabilities	65,879	62,175
Accrued post-retirement benefit and pension costs	50,496	55,545
Net operating loss and tax credit carryforwards	30,696	32,247
Other	17,397	12,099
Deferred Tax Assets, Gross	179,546	175,845
Valuation Allowance	(15,084)	(12,857)
Deferred Tax Assets, Net	164,462	162,988
Inventory	4,890	4,730
Property, Plant and Equipment	47,451	50,440
Rainin Intangible Amortization	66,386	66,755
Deferred Tax Liabilities, Tax Deferred Expense, Compensation and Benefits, Pension	31,473	27,747
International earnings	18,680	23,121
Deferred Tax Liabilities, Unrealized Currency Transaction Gains	9,334	0
Deferred Tax Liabilities, Gross, Noncurrent	178,214	172,793
Deferred Tax Liabilities	$ (13,752)	$ (9,805)