Consolidated Statements Of Stockholders' Equity (Deficit) And Comprehensive Income (Loss) (USD $) In Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total [Member]
Balance at Dec. 31, 2010		$ 313	$ 21,040,919	$ (20,363,468)	$ (1,334)	$ 676,430
Balance, shares at Dec. 31, 2010		172,736
Net income	142,891	0	0	142,891	0	142,891
Other Comprehensive Income (Loss), Net of Tax	(1,750)	0	0	0	(1,750)	(1,750)
Issuance of common stock under stock plans		4	49,979	0	0	49,983
Issuance of common stock under stock plans, shares		3,469
Stock-based compensation		0	46,438	0	0	46,438
Special dividend paid		0	(463,498)	0	0	(463,498)
Net excess income tax benefits associated with stock-based compensation and other		0	11,496	0	0	11,496
Repurchase of common stock		0	(550,097)	0	0	(550,097)
Repurchase of common stock, shares		(16,783)
Balance at Dec. 31, 2011		317	20,135,237	(20,220,577)	(3,084)	(88,107)
Balance, shares at Dec. 31, 2011		159,422
Net income	320,032	0	0	320,032	0	320,032
Other Comprehensive Income (Loss), Net of Tax	2,696	0	0	0	2,696	2,696
Issuance of common stock under stock plans		2	29,301	0	0	29,303
Issuance of common stock under stock plans, shares		1,941
Stock-based compensation		0	36,199	0	0	36,199
Special dividend paid	(463,500)
Net excess income tax benefits associated with stock-based compensation and other		0	16,045	0	0	16,045
Repurchase of common stock		0	(325,680)	0	0	(325,680)
Repurchase of common stock, shares		(7,971)
Balance at Dec. 31, 2012	(9,323)	319	19,891,291	(19,900,545)	(388)	(9,323)
Balance, shares at Dec. 31, 2012	153,392	153,392
Net income	544,450	0	0	544,450	0	544,450
Other Comprehensive Income (Loss), Net of Tax	(2,697)	0	0	0	(2,697)	(2,697)
Issuance of common stock under stock plans		1	20,666	0	0	20,667
Issuance of common stock under stock plans, shares		1,636
Stock-based compensation		0	39,642	0	0	39,642
Net excess income tax benefits associated with stock-based compensation and other		0	19,320	0	0	19,320
Repurchase of common stock		0	(1,035,617)	0	0	(1,035,617)
Repurchase of common stock, shares		(21,304)
Balance at Dec. 31, 2013	$ (423,558)	$ 320	$ 18,935,302	$ (19,356,095)	$ (3,085)	$ (423,558)
Balance, shares at Dec. 31, 2013	133,724	133,724