Condensed Consolidated Statements Stockholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands	Total	Retained Earnings [Member]	Common Stock Including Additional Paid in Capital [Member]	Treasury Stock, Common
Stockholders' Equity Attributable to Parent	$ 216,018	$ (650,516)	$ 980,147	$ (113,613)
Shares, Outstanding			151,119
Allocated share-based compensation expense			$ 38,651
Payments for Repurchase of Common Stock	0
Net income (loss)	371,171	371,171
Common stock issued under employee benefit plans, net of shares withheld for tax	7,453		$ 7,453
Common stock issued under employee benefit plans, net of shares withheld for tax (shares)			5,355
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	17,379		$ (17,379)
Stockholders' Equity Attributable to Parent	615,914	(279,345)	$ 1,008,872	(113,613)
Shares, Outstanding			156,474
Allocated share-based compensation expense			$ 38,991
Payments for Repurchase of Common Stock	39,619
Treasury Stock, Value, Acquired, Par Value Method	(1)
Stock Repurchased During Period, Value	(39,618)
Treasury Stock, Value, Acquired, Cost Method	$ (39,618)
Stock Repurchased During Period, Shares	(5,967)
Net income (loss)	$ 28,847	28,847
Common stock issued under employee benefit plans, net of shares withheld for tax	4,681		$ 4,681
Common stock issued under employee benefit plans, net of shares withheld for tax (shares)			4,381
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	$ 13,410		$ (13,410)
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]	true
Stockholders' Equity Attributable to Parent	$ 611,559	(196,113)	$ 960,903	(153,231)
Shares, Outstanding			154,888
Allocated share-based compensation expense			$ 41,479
Payments for Repurchase of Common Stock	40,000
Treasury Stock, Value, Acquired, Par Value Method	0
Stock Repurchased During Period, Value	(40,000)
Treasury Stock, Value, Acquired, Cost Method	$ (40,000)
Stock Repurchased During Period, Shares	(9,931)
Net income (loss)	$ (53,183)	(53,183)
Common stock issued under employee benefit plans, net of shares withheld for tax	3,999		$ 3,999
Common stock issued under employee benefit plans, net of shares withheld for tax (shares)			4,940
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	8,008		$ (8,008)
Stockholders' Equity Attributable to Parent	$ 555,846	$ (249,296)	$ 998,373	$ (193,231)
Shares, Outstanding			149,897