CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning Balance at Dec. 31, 2009	$ 372,109	$ 28		$ 303,474	$ 72,835	$ (4,228)
Beginning Balance (in shares) at Dec. 31, 2009		27,639,000
Excess tax (deficiency) benefit on stock options	(713)			(713)
Restricted stock grants (in shares)	297,874	298,000
Restricted stock grants	4,619			4,619
Reversal of stock option compensation	(224)			(224)
Retirement of common stock (in shares)		(292,000)
Retirement of common stock	(4,554)			(4,554)
Repurchase of common stock	(5,641)		(5,641)
Retirement of restricted stock (in shares)		(34,000)
Retirement of restricted stock	(177)			(177)
Net income	47,049				47,049
Foreign currency translation adjustment	(60)					(60)
Ending Balance at Dec. 31, 2010	412,408	28	(5,641)	302,425	119,884	(4,288)
Ending Balance (in shares) at Dec. 31, 2010		27,611,000
Exercise of options (in shares)	17,250	18,000
Exercise of options	276			276
Exercise of warrants (in shares)		100,000
Exercise of warrants	1,135			1,135
Excess tax (deficiency) benefit on stock options	363			363
Restricted stock grants (in shares)	141,480	141,000
Restricted stock grants	1,594			1,594
Dividends declared	(5,182)				(5,182)
Retirement of common stock (in shares)		(1,772,000)
Retirement of common stock	(24,359)	(2)	5,641	(29,998)
Retirement of restricted stock (in shares)		(155,000)
Retirement of restricted stock	(1,263)			(1,263)
Net income	8,472				8,472
Foreign currency translation adjustment	147					147
Ending Balance at Dec. 31, 2011	393,591	26		274,532	123,174	(4,141)
Ending Balance (in shares) at Dec. 31, 2011		25,943,000
Exercise of options (in shares)	7,500	8,000
Exercise of options	101			101
Excess tax (deficiency) benefit on stock options	(114)			(114)
Restricted stock grants (in shares)	79,812	32,000
Restricted stock grants	1,122			1,122
Dividends declared	(9,538)				(9,538)
Issued warrants	7,035			7,035
Repurchase of common stock	(80,000)	(4)		(79,996)
Retirement of restricted stock (in shares)		(14,000)
Retirement of restricted stock	(103)			(103)
Repurchase of common stock (in shares)		(4,000,000)
Net income	(104,800)				(104,800)
Foreign currency translation adjustment	(74)					(74)
Ending Balance at Dec. 31, 2012	$ 207,220	$ 22		$ 202,577	$ 8,836	$ (4,215)
Ending Balance (in shares) at Dec. 31, 2012		21,969,000