Pensions and Other Postretirement Benefit Plans (Schedule of Net Periodic Benefit Plan Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of net periodic benefit cost:
Settlement		$ 8,190
Pension Plans [Member]
Components of net periodic benefit cost:
Service cost	$ 2,959	3,269	$ 3,662
Interest cost	7,787	9,505	8,852
Expected return on assets	(8,630)	(9,577)	(8,677)
Amortization of prior service cost/(credit)	$ 48	$ 53	35
Amortization of transition obligation			70
Amortization of net actuarial loss	$ 2,594	$ 2,421	3,117
Settlement	$ 103	8,331	502
Curtailment (gain)/loss		$ (942)	$ (1,143)
Special / contractual termination benefits	$ 44
Net periodic benefit cost	$ 4,905	$ 13,060	$ 6,418
Health care cost trend rate (U.S. and non-U.S. plans):
Initial rate
Ultimate rate
Years to ultimate
Other Postretirement Benefits [Member]
Components of net periodic benefit cost:
Service cost	$ 330	$ 314	$ 875
Interest cost	$ 2,437	$ 2,741	$ 3,080
Expected return on assets
Amortization of prior service cost/(credit)	$ (4,488)	$ (4,488)	$ (3,940)
Amortization of transition obligation
Amortization of net actuarial loss	$ 3,338	$ 2,908	$ 3,395
Settlement
Curtailment (gain)/loss
Special / contractual termination benefits
Net periodic benefit cost	$ 1,617	$ 1,475	$ 3,410
Health care cost trend rate (U.S. and non-U.S. plans):
Initial rate
Ultimate rate
Years to ultimate
United States Pension Plan [Member]
Weighted average assumptions used to determine net cost:
Discount rate	4.18%	5.22%	4.28%
Expected return on plan assets	4.43%	5.40%	4.61%
Rate of compensation increase
Non-U.S. Pension Plans [Member]
Weighted average assumptions used to determine net cost:
Discount rate	3.58%	4.50%	4.09%
Expected return on plan assets	5.52%	5.65%	5.53%
Rate of compensation increase	3.23%	3.39%	3.26%
United States Postretirement Benefits Plan [Member]
Weighted average assumptions used to determine net cost:
Discount rate	3.90%	4.68%	3.93%
Expected return on plan assets
Rate of compensation increase			3.00%
Non-U.S. Postretirement Benefits Plan [Member]
Weighted average assumptions used to determine net cost:
Discount rate	3.85%	4.75%	4.00%
Expected return on plan assets
Rate of compensation increase	3.00%	3.00%	3.00%