Pensions and Other Postretirement Benefit Plans (Schedule of (Gains)/Losses Recognized in Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
(Gains)/losses in plan assets and benefit obligations recognized in other comprehensive income:
Settlements/curtailments	$ (8,377)	$ (46)	$ (118,350)
Asset/liability loss (gain)	14,707	(20,500)	48,233
Amortization of actuarial (loss)	(5,329)	(6,512)	(7,438)
Amortization of prior service (cost)/credit	4,436	3,905	3,631
Amortization of transition (obligation)		(70)	(79)
Pension Plans [Member]
(Gains)/losses in plan assets and benefit obligations recognized in other comprehensive income:
Settlements/curtailments	(8,377)
Asset/liability loss (gain)	10,881
Amortization of actuarial (loss)	(2,421)
Amortization of prior service (cost)/credit	(53)
Amortization of transition (obligation)
Currency impact	(2,428)
(Gain)/loss in other comprehensive income	(2,398)
Total recognized in net periodic benefit cost and other comprehensive income	10,662
Other Postretirement Benefits [Member]
(Gains)/losses in plan assets and benefit obligations recognized in other comprehensive income:
Settlements/curtailments
Asset/liability loss (gain)	5,926
Amortization of actuarial (loss)	(2,908)
Amortization of prior service (cost)/credit	4,489
Amortization of transition (obligation)
Currency impact	2
(Gain)/loss in other comprehensive income	7,509
Total recognized in net periodic benefit cost and other comprehensive income	$ 8,984