Nonpension Postretirement Benefits (Amounts in Accumulated Other Comprehensive Loss to be Recognized During 2017) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Nonpension Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ 47
Prior service cost (credit)	(200)
Total cost (credit)	(153)
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	101
Prior service cost (credit)	(200)
Total cost (credit)	(99)
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	(54)
Prior service cost (credit)	0
Total cost (credit)	$ (54)