CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Earnings (Deficit)	Accumulated Other Comprehensive Loss	Comprehensive Income
Balance at Dec. 31, 2008	$ 698,826	$ 367	$ (493,555)	$ 2,176,556	$ (944,145)	$ (40,397)
Balance (in shares) at Dec. 31, 2008		(47,665,000)	(6,685,000)
Increase (Decrease) in Stockholders' Equity
Net income applicable to common stockholders	489,472				489,472		489,472
Unrealized gain on marketable securities, net of tax of $96, $175, and $0 in 2011, 2010, and 2009 respectively						116	116
Currency translation adjustment, net of tax of $21,547, $11,311 and $1,209 in 2011, 2010, and 2009 respectively						37,281	37,281
Comprehensive income	526,869						526,869
Restricted stock forfeitures (in shares)		(3,000)
Reclassification adjustment for convertible debt in mezzanine	18,203			18,203
Exercise of stock options and vesting of restricted stock units and/or performance share units	43,428	9		43,419
Exercise of stock options and vesting of restricted stock units and/or performance share units (in shares)		1,200,000
Repurchase of common stock	(17,415)		(17,415)
Repurchase of common stock (in shares)			(180,000)
Stock-based compensation and other stock based payments	40,671			40,671
Conversion of debt	8,898	29		8,869
Conversion of debt (in shares)		3,584,000
Excess tax benefit from stock-based compensation	2,149			2,149
Balance at Dec. 31, 2009	1,321,629	405	(510,970)	2,289,867	(454,673)	(3,000)
Balance (in shares) at Dec. 31, 2009		(52,446,000)	(6,865,000)
Increase (Decrease) in Stockholders' Equity
Net income applicable to common stockholders	527,541				527,541		527,541
Redeemable noncontrolling interests fair value adjustment					(3,758)		(3,758)
Unrealized gain on marketable securities, net of tax of $96, $175, and $0 in 2011, 2010, and 2009 respectively						294	294
Currency translation adjustment, net of tax of $21,547, $11,311 and $1,209 in 2011, 2010, and 2009 respectively						(30,183)	(30,183)
Comprehensive income	493,894						493,894
Redeemable noncontrolling interests fair value adjustments	(4,118)			(4,118)
Proceeds from the termination of conversion spread hedges	42,984			42,984
Reclassification adjustment for convertible debt in mezzanine	3,683			3,683
Exercise of stock options and vesting of restricted stock units and/or performance share units	25,751	5		25,746
Exercise of stock options and vesting of restricted stock units and/or performance share units (in shares)		663,000
Repurchase of common stock	(129,445)		(129,445)
Repurchase of common stock (in shares)			(556,000)
Stock-based compensation and other stock based payments	68,396			68,396
Issuance of senior convertible notes	67,516			67,516
Conversion of debt	(80,045)	28		(80,073)
Conversion of debt (in shares)		3,458,000
Excess tax benefit from stock-based compensation	3,091			3,091
Balance at Dec. 31, 2010	1,813,336	438	(640,415)	2,417,092	69,110	(32,889)
Balance (in shares) at Dec. 31, 2010		(56,567,000)	(7,421,000)
Increase (Decrease) in Stockholders' Equity
Net income applicable to common stockholders	1,056,371				1,056,371		1,056,371
Redeemable noncontrolling interests fair value adjustment	(91,743)				(91,743)
Unrealized gain on marketable securities, net of tax of $96, $175, and $0 in 2011, 2010, and 2009 respectively						212	212
Currency translation adjustment, net of tax of $21,547, $11,311 and $1,209 in 2011, 2010, and 2009 respectively						(54,905)	(54,905)
Comprehensive income	1,001,678						1,001,678
Reclassification adjustment for convertible debt in mezzanine	(77,342)			(77,342)
Exercise of stock options and vesting of restricted stock units and/or performance share units	4,302	8		4,294
Exercise of stock options and vesting of restricted stock units and/or performance share units (in shares)		1,007,000
Repurchase of common stock	(163,171)		(163,171)
Repurchase of common stock (in shares)			(359,000)
Stock-based compensation and other stock based payments	66,194			66,194
Conversion of debt	0	0		0
Conversion of debt (in shares)		5,000
Excess tax benefit from stock-based compensation	21,041			21,041
Balance at Dec. 31, 2011	$ 2,574,295	$ 446	$ (803,586)	$ 2,431,279	$ 1,033,738	$ (87,582)
Balance (in shares) at Dec. 31, 2011		(57,579,000)	(7,780,000)