Pension (Pre-tax Amounts Recognized in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	$ 116,907	$ 113,971
Prior service cost (credit)	(2,467)	(2,972)
Total cost (credit)	114,440	110,999
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	105,830	96,983
Prior service cost (credit)	237	500
Total cost (credit)	106,067	97,483
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss (gain)	11,077	16,988
Prior service cost (credit)	(2,704)	(3,472)
Total cost (credit)	$ 8,373	$ 13,516