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 [Member]
Stockholders' Equity Attributable to Parent	$ 233,529	$ (583,733)	$ 930,875	$ (113,613)
Shares, Outstanding			146,818
Allocated share-based compensation expense			$ 29,963
Convertible debt, equity portion	35,674
Net income (loss)	(66,783)	(66,783)
Common stock issued under employee benefit plans, net of shares withheld for tax	5,481		$ 5,481
Common stock issued under employee benefit plans, net of shares withheld for tax (shares)			4,301
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	6,207		$ (6,207)
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Repurchases	(5,390)
Stockholders' Equity Attributable to Parent	216,018	(650,516)	$ 980,147	(113,613)
Shares, Outstanding			151,119
Allocated share-based compensation expense			$ 38,651
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
Treasury Stock, Value, Acquired, Par Value Method	(1)
Stock Repurchased During Period, Value	(39,619)
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