Pensions and Other Postretirement Benefit Plans (Schedule of Plan Benefit Obligations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension Plans [Member]
Change in benefit obligation:
Benefit obligation, beginning of year	$ 213,110	$ 204,334
Service cost	2,959	3,269	$ 3,662
Interest cost	7,787	9,505	8,852
Plan participants' contributions	304	323
Actuarial (gain)/loss	(4,209)	30,943
Benefits paid	(6,530)	(6,205)
Settlements and curtailments	(321)	$ (17,936)
Plan amendments and other	(37)
Foreign currency changes	(13,207)	$ (11,123)
Benefit obligation, end of year	199,856	213,110	204,334
Accumulated benefit obligation	188,909	199,622
Other Postretirement Benefits [Member]
Change in benefit obligation:
Benefit obligation, beginning of year	64,987	61,108
Service cost	330	314	875
Interest cost	$ 2,437	$ 2,741	3,080
Plan participants' contributions
Actuarial (gain)/loss	$ (2,855)	$ 5,926
Benefits paid	$ (4,758)	$ (5,010)
Settlements and curtailments
Plan amendments and other
Foreign currency changes	$ (171)	$ (92)
Benefit obligation, end of year	$ 59,970	$ 64,987	$ 61,108
Accumulated benefit obligation
United States Pension Plan [Member]
Weighted average assumptions used to determine benefit obligations, end of year:
Discount rate	4.54%	4.18%
Compensation increase
Non-U.S. Pension Plans [Member]
Weighted average assumptions used to determine benefit obligations, end of year:
Discount rate	3.67%	3.58%
Compensation increase	3.24%	3.23%
United States Postretirement Benefits Plan [Member]
Weighted average assumptions used to determine benefit obligations, end of year:
Discount rate	4.24%	3.90%
Compensation increase
Non-U.S. Postretirement Benefits Plan [Member]
Weighted average assumptions used to determine benefit obligations, end of year:
Discount rate	4.00%	3.85%
Compensation increase	3.00%	3.00%