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Other Comprehensive Earnings (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Foreign currency translation adjustments [Abstract]      
Foreign currency translation, pre-tax $ (74,476) $ (33,636) $ 76,442
Foreign currency translation, tax 13,954 0 0
Total foreign currency translation, net of tax (60,522) (33,636) 76,442
Pension and other post retirement plan adjustments [Abstract]      
Pension and other post retirement plan, pre-tax (54,519) (2,468) (1,767)
Pension and other post retirement plan, tax 18,204 1,189 (1,740)
Total pension and other postretirement plans, net of tax (36,315) (1,279) (3,507)
Changes in fair value of cash flow hedges and other [Abstract]      
Changes in fair value of cash flow hedges and other, pre-tax (1,379) 360 1,673
Changes in fair value of cash flow hedges and other, tax 545 (126) (582)
Total cash flow hedges (834) 234 1,091
Total other comprehensive earnings [Abstract]      
Total other comprehensive earnings, pre-tax (130,374) (35,744) 76,348
Total other comprehensive earnings, tax 32,703 1,063 (2,322)
Other comprehensive (loss) earnings (97,671) (34,681) 74,026
Components of accumulated other comprehensive (loss) earnings [Abstract]      
Cumulative foreign currency translation adjustments 126,992 187,514  
Pension and other post retirement plan adjustments (176,877) (140,562)  
Changes in fair value of cash flow hedges 2,375 3,209  
Total accumulated other comprehensive (loss) earnings $ (47,510) $ 50,161