Accumulated Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Foreign Currency Translation [Member]	Dec. 31, 2012 Foreign Currency Translation [Member]	Mar. 31, 2013 Defined Benefit Pension Plans [Member]	Mar. 31, 2013 Defined Benefit Postretirement Plans [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Foreign currency translation, beginning of period			$ (5,741)	$ 14,415
Foreign currency translation, current-period change	(20,156)	10,352	(20,156)
Foreign currency translation, end of period			(5,741)	14,415
Defined benefit pension/postretirement plans, beginning of period					(91,514)	3,080
Defined benefit pension/postretirement, current-period change					1,688	(55)
Defined benefit pension/postretirement plans, end of period					(89,826)	3,025
Accumulated other comprehensive loss, beginning of period	(74,019)
Accumulated other comprehensive loss, current-period change	(18,523)
Accumulated other comprehensive loss, end of period	$ (92,542)