Pension and Postretirement Benefits (Change in Benefit Obligation) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
U.S Defined Benefit Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Balance —		$ 447,552	$ 405,812
Service cost		24,113	22,981	$ 23,355
Interest cost		17,072	17,429	15,089
Actuarial loss (gain)	[1]	(28,052)	32,425
Plan Amendments		0	(2,387)
Benefits paid		(34,437)	(33,482)
Balance —		426,248	447,552	405,812
Accumulated benefit obligations		426,248	447,552
Non-U.S Defined Benefit Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Balance —		361,351	363,425
Acquisition		65,920	0
Service cost		7,832	6,857	6,819
Interest cost		11,770	14,576	13,486
Employee contributions		312	272
Plan amendments and other		(1,254)	162
Actuarial loss (gain)	[2]	(6,407)	28,430
Benefits paid		(16,476)	(17,985)
Currency translation impact	[3]	(36,873)	(34,386)
Balance —		386,175	361,351	363,425
Accumulated benefit obligations		363,918	335,282
Postretirement Medical Benefits
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Balance —		33,019	31,477
Service cost		2	3	6
Interest cost		1,155	1,200	1,066
Employee contributions		789	901
Medicare subsidies receivable		71	453
Actuarial loss (gain)		127	1,779
Plan Amendments		(625)	2,339
Benefits paid		(5,924)	(5,133)
Balance —		$ 28,614	$ 33,019	$ 31,477

[1] The 2015 actuarial gain primarily reflects the impact of an increase in the discount rate.

[2] The 2015 actuarial gain primarily reflects the increase in the discount rate for Germany.

[3] The currency translation impact reflects the strengthening of the U.S. dollar against our significant currencies, primarily the Euro and British pound.