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Comprehensive Earnings (Details) (USD $)
In Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Comprehensive Earnings [Abstract]        
Net earnings $ 249,769 $ 169,870 $ 444,674 $ 277,997
Foreign currency translation adjustment, net of tax 18,760 (86,198) 90,944 (171,465)
Other, net of tax 875 609 352 1,949
Comprehensive earnings $ 269,404 $ 84,281 $ 535,970 $ 108,481