Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 201,461	$ 266,586	$ 386,630	$ 517,198
Foreign currency forward exchange contracts:
Unrealized holding (loss) gain	(1,250)	4,643	2,906	7,683
Reclassification adjustment for loss (gain) included in net income	258	(3,541)	1,577	(4,949)
Investments in marketable securities:
Unrealized holding gain (loss)	26	(5)	(11)	1
Reclassification adjustment for loss (gain) included in net income	64	(5)	84	(379)
Total other comprehensive (loss) gain	(902)	1,092	4,556	2,356
Comprehensive income	$ 200,559	$ 267,678	$ 391,186	$ 519,554

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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