Condensed Consolidated Statement of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]
Balance at Dec. 31, 2008	$ 105,611	$ 216	$ 0	$ 55,388	$ 50,007
Treasury Stock, Shares at Dec. 31, 2008			(11,646)
Common Stock, Shares, Issued at Dec. 31, 2008		21,577,366
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	1,614	0	0	1,614	0
Exercise of stock options, shares		382,852
Exercise of stock options, value	1,938	4	0	1,934
Issuance of restricted stock, shares		62,189
Issuance of restricted stock, value		0		0
Issuance of restricted stock	0
Excess tax benefits from exercise of stock options, value	1,476	0	0	1,476	0
Proceeds from sale of common stock, net of expenses, value	90,997	48	0	90,949	0
Proceeds from sale of common stock, net of expenses, shares		4,830,000	0
Net (loss) income	20,030			0	20,030
Balance at Dec. 31, 2009	221,666	268	0	151,361	70,037
Treasury Stock, Shares at Dec. 31, 2009			(11,646)
Common Stock, Shares, Issued at Dec. 31, 2009		26,852,407
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	2,542	0	0	2,542	0
Exercise of stock options, shares		82,510
Exercise of stock options, value	669	1	0	668
Issuance of restricted stock, shares		82,248
Issuance of restricted stock, value		1		0
Issuance of restricted stock	1
Excess tax benefits from exercise of stock options, value	96	0	0	96	0
Proceeds from sale of common stock, net of expenses, value	0
Forfeiture of restricted stock, shares		0	(585)
Forfeiture of restricted stock, value	0	0	0	0	0
Net (loss) income	21,882			0	21,882
Balance at Dec. 31, 2010	246,856	270	0	154,667	91,919
Treasury Stock, Shares at Dec. 31, 2010	12,231		(12,231)
Common Stock, Shares, Issued at Dec. 31, 2010	27,017,165	27,017,165
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	2,712	0	0	2,712	0
Exercise of stock options, shares		32,124
Exercise of stock options, value	185	0	0	185
Issuance of restricted stock, shares		400,417
Issuance of restricted stock, value		4		(4)
Issuance of restricted stock	0
Proceeds from sale of common stock, net of expenses, value	0
Forfeiture of restricted stock, shares		(12,784)
Forfeiture of restricted stock, value	0	0	0	0	0
Purchase of stock into treasury, shares		0	(305,500)
Purchase of stock into treasury, value	(3,003)	0	(3,003)	0
Net (loss) income	(13,114)			0	(13,114)
Balance at Dec. 31, 2011	$ 233,636	$ 274	$ (3,003)	$ 157,560	$ 78,805
Treasury Stock, Shares at Dec. 31, 2011	317,731		(317,731)
Common Stock, Shares, Issued at Dec. 31, 2011	27,436,922	27,436,922