Consolidated Statement of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Treasury Stock	Additional Paid-In	Retained	Non-controlling Interest
Beginning at Dec. 31, 2009	$ 221,666	$ 268	$ 0	$ 151,361	$ 70,037	$ 0
Treasury stock, shares at Dec. 31, 2009			(11,646)
Balance, shares at Dec. 31, 2009		26,852,407
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	2,542			2,542
Exercise of stock options	669	1		668
Exercise of stock options, shares	82,510	82,510
Issuance of restricted stock	1	1		0
Issue restricted stock, shares		82,248
Excess tax benefits from exercise of stock options	96			96
Forfeiture of restricted stock	0
Forfeiture of restricted stock, shares		0	585
Net income (loss)	21,882				21,882
Beginning at Dec. 31, 2010	246,856	270	0	154,667	91,919	0
Treasury stock, shares at Dec. 31, 2010			(12,231)
Balance, shares at Dec. 31, 2010		27,017,165
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	2,712			2,712
Exercise of stock options	185	0		185
Exercise of stock options, shares	32,124	32,124
Issuance of restricted stock	0	4		(4)
Issue restricted stock, shares		400,417
Forfeiture of restricted stock	0
Forfeiture of restricted stock, shares		(12,784)	0
Purchase of stock into treasury	(3,003)		3,003
Purchase of stock into treasury, shares	(305,500)		(305,500)
Net income (loss)	(13,114)				(13,114)
Beginning at Dec. 31, 2011	233,636	274	(3,003)	157,560	78,805	0
Treasury stock, shares at Dec. 31, 2011	(317,731)		(317,731)
Balance, shares at Dec. 31, 2011	27,436,922	27,436,922
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	3,115			3,115
Exercise of stock options	299	1		298
Exercise of stock options, shares	56,658	56,658
Issuance of restricted stock	0	0
Noncontrolling interest, acquired	16					16
Contributions from noncontrolling interest	34					34
Issue restricted stock, shares		36,640
Net income (loss)	(11,866)				(11,866)
Beginning at Dec. 31, 2012	$ 225,234	$ 275	$ (3,003)	$ 160,973	$ 66,939	$ 50
Treasury stock, shares at Dec. 31, 2012	(317,731)		(317,731)
Balance, shares at Dec. 31, 2012	27,530,220	27,530,220