Other Comprehensive Earnings (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2012	Mar. 31, 2011
Foreign currency translation adjustments [Abstract]
Foreign currency translation, pre-tax	$ 42,806	$ 72,184
Foreign currency translation, tax	704	0
Total foreign currency translation, net of tax	43,510	72,184
Changes in fair value of cash flow hedges and other [Abstract]
Changes in fair value of cash flow hedges and other, pre-tax	(1,992)	(651)
Changes in fair value of cash flow hedges and other, tax	(276)	128
Total cash flow hedges	(2,268)	(523)
Total other comprehensive earnings [Abstract]
Total other comprehensive earnings, pre-tax	40,814	71,533
Total other comprehensive earnings, tax	428	128
Other comprehensive (loss) earnings	$ 41,242	$ 71,661

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