CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2010	$ 149,763	$ 242	$ 73,440	$ (1,432)	$ 77,513
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	16,389				16,389
Other comprehensive income (loss)	0					0
Issuance of stock
7,850 shares in connection with exercise of options	61		57	4
Shares of restricted stock	(1)		(25)	24
401k plan contribution	811		589	222
Restricted stock compensation	1,254		1,254
Other	(492)		(492)
Balance at Dec. 31, 2011	167,785	242	74,823	(1,182)	93,902
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	16,487				16,487
Other comprehensive income (loss)	(49)					(49)
Issuance of stock
Shares of restricted stock	0		(515)	515
401k plan contribution	793		582	211
783,798 shares for Valent acquisition	15,000	16	14,984
Restricted stock compensation	1,494		1,494
Other	(556)	(1)	(529)	(26)
Balance at Dec. 31, 2012	200,954	257	90,839	(482)	110,389	(49)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(58,485)				(58,485)
Other comprehensive income (loss)	(458)					(458)
Issuance of stock
Shares of restricted stock	0		(237)	237
401k plan contribution	901		707	194
Restricted stock compensation	1,615		1,615	0
Other	(383)		(232)	(151)
Balance at Dec. 31, 2013	$ 144,144	$ 257	$ 92,692	$ (202)	$ 51,904	$ (507)