Pension and Other Postretirement Benefits - Amounts to be Amortized From AOCI Over Next Fiscal Year (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Actuarial Loss	$ 3,466
Prior Service (Credit) Cost	(92)
Total	3,374
Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial Loss	2,658
Prior Service (Credit) Cost	63
Total	2,721
Foreign [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial Loss	808
Prior Service (Credit) Cost	(155)
Total	653
Domestic Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Actuarial Loss	22
Prior Service (Credit) Cost	0
Total	$ 22