Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income	$ 76,730	$ 78,245	$ 200,879	$ 238,518
Other comprehensive income:
Change in foreign currency translation adjustment	6,928	5,414	4,099	(4,436)
Available for sale securities:
Change in net unrealized gains	1,623	(1,037)	(1,470)	1,420
Less: reclassification adjustment for net losses (gains) included in net income	44	2,579	13	(283)
Net change (net of tax effect)	1,667	1,542	(1,457)	1,137
Loss on pension liability	0	0	(334)	0
Cash flow hedges:
Change in unrealized gains	3,896	2,235	(1,399)	(109)
Less: reclassification adjustment for net losses included in net income	1,262	2,530	3,574	4,836
Net change (net of tax effect)	5,158	4,765	2,175	4,727
Other comprehensive income	13,753	11,721	4,483	1,428
Comprehensive income	$ 90,483	$ 89,966	$ 205,362	$ 239,946