Statement of Equity Statement - USD ($) shares in Thousands, $ in Thousands	Total	Retained Earnings [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Additional Paid-in Capital [Member]	Common Stock [Member]
Shares, Issued			3,751			293,938
Stockholders' Equity Attributable to Parent	$ 1,931,382	$ (580,027)	$ (16,788)	$ (101,342)	$ 2,629,245	$ 294
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	(882)	(882)
Stock Issued During Period, Shares, Employee Stock Purchase Plans						6,543
Stock Issued During Period, Value, Employee Stock Purchase Plan	9,360				9,354	$ 6
Cancellation of Restricted Stock and Repurchase of Common Stock at Cost for Employee Tax Withholding, Shares						2,151
Cancellation of Restricted Stock and Repurchase of Common Stock at Cost for Employee Tax Withholding, Value	34,507				34,505	$ 2
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	$ 93,775				93,775
Stock Repurchased and Retired During Period, Shares	5,800
Net income (loss)	$ (110,825)	(110,825)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	5,379			5,379
Shares, Issued			3,751			297,243
Stockholders' Equity Attributable to Parent	2,025,131	(527,681)	$ (16,788)	(99,988)	2,669,291	$ 297
Stock Issued During Period, Shares, Employee Stock Purchase Plans						1,240
Stock Issued During Period, Value, Employee Stock Purchase Plan	9,354				9,353	$ 1
Cancellation of Restricted Stock and Repurchase of Common Stock at Cost for Employee Tax Withholding, Shares						153
Cancellation of Restricted Stock and Repurchase of Common Stock at Cost for Employee Tax Withholding, Value	2,519				2,519	$ 0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	21,744				21,744
Net income (loss)	(164,053)	(164,053)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	4,025			4,025
Shares, Issued			3,751			298,330
Stockholders' Equity Attributable to Parent	1,893,682	(691,734)	$ (16,788)	(95,963)	2,697,869	$ 298
Shares, Issued			3,751			291,504
Stockholders' Equity Attributable to Parent	1,717,496	(740,837)	$ (16,788)	(122,863)	2,597,693	$ 291
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	233,415	233,415
Stock Issued During Period, Shares, Employee Stock Purchase Plans						6,579
Stock Issued During Period, Value, Employee Stock Purchase Plan	8,643				8,636	$ 7
Cancellation of Restricted Stock and Repurchase of Common Stock at Cost for Employee Tax Withholding, Shares						1,982
Cancellation of Restricted Stock and Repurchase of Common Stock at Cost for Employee Tax Withholding, Value	31,560				31,558	$ 2
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	$ 109,252				109,252
Stock Repurchased and Retired During Period, Shares	6,100					6,063
Stock Repurchased and Retired During Period, Value	$ 91,321				91,315	$ 6
Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses)	5,605			5,605
Net income (loss)	96,422
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(3,205)			(3,205)
Shares, Issued			3,751			290,035
Stockholders' Equity Attributable to Parent	1,942,139	(488,332)	$ (16,788)	(131,527)	2,578,496	$ 290
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Net Income	0
Stock Issued During Period, Shares, Employee Stock Purchase Plans						1,426
Stock Issued During Period, Value, Employee Stock Purchase Plan	8,643				8,642	$ 1
Cancellation of Restricted Stock and Repurchase of Common Stock at Cost for Employee Tax Withholding, Shares						252
Cancellation of Restricted Stock and Repurchase of Common Stock at Cost for Employee Tax Withholding, Value	4,040				4,040	$ 0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition	25,774				25,774
Stock Repurchased and Retired During Period, Shares						1,171
Stock Repurchased and Retired During Period, Value	16,165				16,164	$ 1
Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses)	5,605			5,605
Net income (loss)	77,332
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	5,459			5,459
Shares, Issued			3,751			290,038
Stockholders' Equity Attributable to Parent	$ 2,044,747	$ (411,000)	$ (16,788)	$ (120,463)	$ 2,592,708	$ 290