CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Comprehensive Income	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Treasury Stock
Balance at Dec. 31, 2011 (Scenario, Previously Reported)	$ 45,471		$ 121	$ 911,987	$ (858,105)	$ (8,532)
Balance (Restatement Adjustment)			(3)	3
Balance at Dec. 31, 2011	45,471		118	911,990	(858,105)	(8,532)
Balance (in shares) at Dec. 31, 2011 (Scenario, Previously Reported)			12,169,000			1,123,000
Balance (in shares) (Restatement Adjustment)			(343,000)
Balance (in shares) at Dec. 31, 2011			11,826,000			1,123,000
Comprehensive income:
Net income	46,625	46,625			46,625
Comprehensive income		46,625
Stock-based compensation	4,756			4,756
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of withholding taxes	(814)		5	(819)
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of withholding taxes (in shares)			456,000
Purchase of treasury stock	(880)					(880)
Purchase of treasury stock (in shares)	65,218					65,000
Dividends	(12,236)			(12,236)
Balance (Restatement Adjustment)			(1)	1
Balance at Dec. 31, 2012	82,922		122	903,692	(811,480)	(9,412)
Balance (in shares) (Restatement Adjustment)			(87,000)
Balance (in shares) at Dec. 31, 2012			12,195,000			1,188,000
Comprehensive income:
Net income	3,947	3,947			3,947
Comprehensive income		3,947
Stock-based compensation	5,629			5,629
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of withholding taxes	(2,806)		4	(2,810)
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of withholding taxes (in shares)			425,000
Purchase of treasury stock	(3,321)					(3,321)
Purchase of treasury stock (in shares)	180,453					181,000
Dividends	637			637
Balance at Dec. 31, 2013	$ 87,008		$ 126	$ 907,148	$ (807,533)	$ (12,733)
Balance (in shares) at Dec. 31, 2013			12,620,000			1,369,000