CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Balance at Dec. 31, 2011	$ 564,316	$ 116	$ 2,433,164	$ (1,868,089)	$ (875)
Balance, Shares at Dec. 31, 2011		116,257,000
Net loss	(10,937)			(10,937)
Other comprehensive income, net of tax	410				410
Issuance of Common Stock under option, stock award and purchase plans	4,536	3	4,533
Issuance of Common Stock under option, stock award and purchase plans, Shares		3,045,000
Repurchase of Common Stock	(22,639)	(5)	(22,634)
Repurchase of Common Stock, Shares		(5,109,000)
Stock-based compensation	18,926		18,926
Excess tax benefits increase (decrease) from Share-based Compensation, Net	(1,199)		(1,199)
Balance at Dec. 31, 2012	553,413	114	2,432,790	(1,879,026)	(465)
Balance, Shares at Dec. 31, 2012		114,193,000
Net loss	37,027			37,027
Other comprehensive income, net of tax	256				256
Issuance of Common Stock under option, stock award and purchase plans	5,186	3	5,183
Issuance of Common Stock under option, stock award and purchase plans, Shares		3,482,000
Repurchase of Common Stock	(116,529)	(18)	(116,511)
Repurchase of Common Stock, Shares		(18,262,000)
Stock-based compensation	16,089		16,089
Excess tax benefits increase (decrease) from Share-based Compensation, Net	(1,276)		(1,276)
Balance at Dec. 31, 2013	494,166	99	2,336,275	(1,841,999)	(209)
Balance, Shares at Dec. 31, 2013		99,413,000
Net loss	(46,248)			(46,248)
Other comprehensive income, net of tax	(1,771)				(1,771)
Issuance of Common Stock under option, stock award and purchase plans	1,106	2	1,104
Issuance of Common Stock under option, stock award and purchase plans, Shares		2,181,000
Repurchase of Common Stock	(93,128)	(13)	(93,115)
Repurchase of Common Stock, Shares		(13,894,000)
Stock-based compensation	17,287		17,287
Excess tax benefits increase (decrease) from Share-based Compensation, Net	401		401
Balance at Dec. 31, 2014	$ 371,813	$ 88	$ 2,261,952	$ (1,888,247)	$ (1,980)
Balance, Shares at Dec. 31, 2014		87,700,000