Consolidated Statements Of Stockholders' Equity (Deficit) And Comprehensive Income (Loss) (USD $) In Thousands	Total	Total [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total Attributable to Common Stockholders [Member]	Noncontrolling Interest In Subsidiary [Member]
Balance at Dec. 31, 2009		$ 598,664	$ 308	$ 21,736,209	$ (21,194,435)	$ 7,659	$ 549,741	$ 48,923
Balance, shares at Dec. 31, 2009			183,299
Net income	833,854	833,854	0	0	830,967	0	830,967	2,887
Other Comprehensive Income (Loss), Net of Tax	(19,619)	(19,619)	0	0	0	(8,993)	(8,993)	(10,626)
Issuance of common stock under stock plans		92,510	5	92,505	0	0	92,510	0
Issuance of common stock under stock plans, shares			5,579
Stock-based compensation		54,091	0	54,087	0	0	54,087	4
Special dividend paid	(518,217)	(518,217)	0	(518,217)	0	0	(518,217)	0
Dividend declared to noncontrolling interest in subsidiary		(856)	0	0	0	0	0	(856)
Deconsolidation upon divestiture of the Authentication Services business		(40,332)	0	0	0	0	0	(40,332)
Net excess income tax benefits associated with stock-based compensation and other		126,084	0	126,084	0	0	126,084	0
Repurchase of common stock		(449,749)	0	(449,749)	0	0	(449,749)	0
Repurchase of common stock, shares			(16,142)
Balance at Dec. 31, 2010		676,430	313	21,040,919	(20,363,468)	(1,334)	676,430	0
Balance, shares at Dec. 31, 2010			172,736
Net income	142,891	142,891	0	0	142,891	0	142,891	0
Other Comprehensive Income (Loss), Net of Tax	(1,750)	(1,750)	0	0	0	(1,750)	(1,750)	0
Issuance of common stock under stock plans		49,983	4	49,979	0	0	49,983	0
Issuance of common stock under stock plans, shares			3,469
Stock-based compensation		46,438	0	46,438	0	0	46,438	0
Special dividend paid	(463,498)	(463,498)	0	(463,498)	0	0	(463,498)	0
Net excess income tax benefits associated with stock-based compensation and other		11,496	0	11,496	0	0	11,496	0
Repurchase of common stock		(550,097)	0	(550,097)	0	0	(550,097)	0
Repurchase of common stock, shares			(16,783)
Balance at Dec. 31, 2011	(88,107)	(88,107)	317	20,135,237	(20,220,577)	(3,084)	(88,107)	0
Balance, shares at Dec. 31, 2011	159,422		159,422
Net income	320,032	320,032	0	0	320,032	0	320,032	0
Other Comprehensive Income (Loss), Net of Tax	2,696	2,696	0	0	0	2,696	2,696	0
Issuance of common stock under stock plans		29,303	2	29,301	0	0	29,303	0
Issuance of common stock under stock plans, shares			1,941
Stock-based compensation		36,199	0	36,199	0	0	36,199	0
Net excess income tax benefits associated with stock-based compensation and other		16,045	0	16,045	0	0	16,045	0
Repurchase of common stock		(325,680)	0	(325,680)	0	0	(325,680)	0
Repurchase of common stock, shares			(7,971)
Stockholders' Equity, Other		189	0	189	0	0	189
Stockholders' Equity, Other Shares			0
Balance at Dec. 31, 2012	$ (9,323)	$ (9,323)	$ 319	$ 19,891,291	$ (19,900,545)	$ (388)	$ (9,323)	$ 0
Balance, shares at Dec. 31, 2012	153,392		153,392