Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income	$ 178,186	$ 256,854	$ 564,816	$ 774,052
Foreign currency forward exchange contracts:
Unrealized holding gain (loss)	1,118	(11,221)	4,024	(3,538)
Reclassification adjustment for loss (gain) included in net income	1,868	(3,115)	3,445	(8,064)
Investments in marketable securities:
Unrealized holding gain (loss)	29	(55)	18	(54)
Reclassification adjustment for (gain) loss included in net income	(28)	1	56	(378)
Total other comprehensive gain (loss)	2,987	(14,390)	7,543	(12,034)
Comprehensive income	$ 181,173	$ 242,464	$ 572,359	$ 762,018