Pensions and Other Postretirement Benefit Plans (Schedule of Other Changes Recognized in Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Settlements	$ (118,350)	$ (327)	$ 1,048
Asset/liability loss (gain)	48,233	28,375	19,645
Amortization of actuarial (loss)	(7,438)	(8,694)	(7,661)
Amortization of prior service (cost)/credit	3,631	3,629	3,650
Amortization of transition (obligation)	(79)	(83)	(94)
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	128,190	13,569	13,810
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Settlements	(118,350)
Asset/liability loss (gain)	41,889
Amortization of actuarial (loss)	(4,223)
Amortization of prior service (cost)/credit	(35)
Amortization of transition (obligation)	(79)
Currency impact	2,877
Total recognized in other comprehensive income	(77,921)
Total recognized in net periodic benefit cost and other comprehensive income	50,269
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	4,311	5,101	2,300
Other changes in plan assets and benefit obligations recognized in other comprehensive income:
Settlements
Asset/liability loss (gain)	6,344
Amortization of actuarial (loss)	(3,215)
Amortization of prior service (cost)/credit	3,666
Amortization of transition (obligation)
Currency impact	3
Total recognized in other comprehensive income	6,798
Total recognized in net periodic benefit cost and other comprehensive income	$ 11,109