CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Treasury Stock	Comprehensive Income
Balance at Dec. 31, 2011	$ 45,471	$ 121	$ 911,987	$ (858,105)	$ (8,532)
Balance (in shares) at Dec. 31, 2011		12,169			1,123
Comprehensive income:
Net income for the six months ended June 30, 2012	39,924			39,924		39,924
Comprehensive income	39,924					39,924
Non-cash compensation	2,425		2,425
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of withholding taxes	(348)	4	(352)
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of withholding taxes (in shares)		329
Purchase of treasury stock	(129)				(129)
Purchase of treasury stock (in shares)					15
Balance at Jun. 30, 2012	$ 87,343	$ 125	$ 914,060	$ (818,181)	$ (8,661)
Balance (in shares) at Jun. 30, 2012		12,498			1,138