Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Accumulated Other Comprehensive Loss	Retained Earnings [Member]
Common Stock, Shares, Outstanding		106,303
Common stock and additional paid-in capital	$ 4,035,849
Stockholders' Equity Attributable to Parent	4,553,218
Accumulated Other Comprehensive Income (Loss), Net of Tax	5,232
Retained Earnings (Accumulated Deficit)	512,137
Net (loss) income	241,568	$ 0	$ 0	$ 241,568
Other Comprehensive Income (Loss), Net of Tax	(16,597)	$ 0	(16,597)	0
Exercise Of Stock Options And Vesting Of Restricted Stock Units Net Of Shares Withheld For Employee Taxes Shares		550
Exercise Of Stock Options And Vesting Of Restricted Stock Units Net Of Shares Withheld For Employee Taxes	(21,502)	$ (21,502)	0	0
Stock Issued During Period, Shares, Employee Stock Purchase Plans		345
Stock Issued During Period, Value, Employee Stock Purchase Plan	$ 30,169	$ 30,169	0	0
Stock Repurchased During Period, Shares	(7,200)	(7,177)
Stock Repurchased During Period, Value	$ (711,732)	$ (274,020)	0	(437,712)
Stock-based compensation	89,444	$ 89,444	0	0
Payments for Repurchase of Common Stock	711,732
Common Stock, Shares, Outstanding		102,061
Common stock and additional paid-in capital	3,915,969
Stockholders' Equity Attributable to Parent	4,322,140
Accumulated Other Comprehensive Income (Loss), Net of Tax	(41,776)
Retained Earnings (Accumulated Deficit)	447,947
Net (loss) income	(15,931)	$ 0	0	(15,931)
Other Comprehensive Income (Loss), Net of Tax	30,411	$ 0	30,411	0
Exercise Of Stock Options And Vesting Of Restricted Stock Units Net Of Shares Withheld For Employee Taxes Shares		41
Exercise Of Stock Options And Vesting Of Restricted Stock Units Net Of Shares Withheld For Employee Taxes	(321)	$ (321)	0	0
Stock Issued During Period, Shares, Employee Stock Purchase Plans		150
Stock Issued During Period, Value, Employee Stock Purchase Plan	$ 11,276	$ 11,276	0	0
Stock Repurchased During Period, Shares	(2,200)	(2,231)
Stock Repurchased During Period, Value	$ (201,633)	$ (85,610)	0	(116,023)
Stock-based compensation	$ 18,626	$ 18,626	0	0
Common Stock, Shares, Outstanding	100,021	100,021
Common stock and additional paid-in capital	$ 3,859,940
Stockholders' Equity Attributable to Parent	4,164,568
Accumulated Other Comprehensive Income (Loss), Net of Tax	(11,365)
Retained Earnings (Accumulated Deficit)	$ 315,993
Common Stock, Shares, Outstanding	98,649
Common stock and additional paid-in capital	$ 3,821,474
Stockholders' Equity Attributable to Parent	3,902,794
Accumulated Other Comprehensive Income (Loss), Net of Tax	(3,175)
Retained Earnings (Accumulated Deficit)	84,495
Net (loss) income	(73,057)	$ 0	0	(73,057)
Other Comprehensive Income (Loss), Net of Tax	3,277	$ 0	3,277	0
Exercise Of Stock Options And Vesting Of Restricted Stock Units Net Of Shares Withheld For Employee Taxes Shares		616
Exercise Of Stock Options And Vesting Of Restricted Stock Units Net Of Shares Withheld For Employee Taxes	(25,010)	$ (25,010)	0	0
Stock Issued During Period, Shares, Employee Stock Purchase Plans		479
Stock Issued During Period, Value, Employee Stock Purchase Plan	$ 35,045	$ 35,045	0	0
Stock Repurchased During Period, Shares	(3,100)	(3,064)
Stock Repurchased During Period, Value	$ (301,978)	$ (198,208)	0	(103,770)
Stock-based compensation	97,276	$ 97,276	0	0
Payments for Repurchase of Common Stock	300,043
Common Stock, Shares, Outstanding		97,506
Common stock and additional paid-in capital	3,796,189
Stockholders' Equity Attributable to Parent	3,817,186
Accumulated Other Comprehensive Income (Loss), Net of Tax	(13,609)
Retained Earnings (Accumulated Deficit)	34,606
Net (loss) income	(126,938)	$ 0	0	(126,938)
Other Comprehensive Income (Loss), Net of Tax	13,711	$ 0	13,711	0
Exercise Of Stock Options And Vesting Of Restricted Stock Units Net Of Shares Withheld For Employee Taxes Shares		19
Exercise Of Stock Options And Vesting Of Restricted Stock Units Net Of Shares Withheld For Employee Taxes	(847)	$ (847)	0	0
Stock Issued During Period, Shares, Employee Stock Purchase Plans		217
Stock Issued During Period, Value, Employee Stock Purchase Plan	$ 15,865	$ 15,865	0	0
Stock Repurchased During Period, Shares	(1,100)	(1,062)
Stock Repurchased During Period, Value	$ (100,812)	$ (100,812)	0	0
Stock-based compensation	$ 20,182	$ 20,182	$ 0	$ 0
Common Stock, Shares, Outstanding	96,680
Common stock and additional paid-in capital	$ 3,730,577
Stockholders' Equity Attributable to Parent	3,638,347
Accumulated Other Comprehensive Income (Loss), Net of Tax	102
Retained Earnings (Accumulated Deficit)	$ (92,332)