CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2009	$ 240	$ 71,375	$ (1,704)	$ 64,582	$ 0	$ 134,493
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	0	12,931	0	12,931
Other comprehensive income (loss)	0	0	0	0	0	0
Issuance of stock
Shares in connection with exercise of options	0	33	30	0	0	63
Shares of restricted stock	2	(2)	0	0	0	0
401k plan contribution	0	414	242	0	0	656
Restricted stock compensation	0	1,794	0	0	0	1,794
Other	0	(174)	0	0	0	(174)
Balance at Dec. 31, 2010	242	73,440	(1,432)	77,513	0	149,763
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	0	16,389	0	16,389
Other comprehensive income (loss)	0	0	0	0	0	0
Issuance of stock
Shares in connection with exercise of options	0	57	4	0	0	61
Shares of restricted stock	0	(25)	24	0	0	(1)
401k plan contribution	0	589	222	0	0	811
Restricted stock compensation	0	1,254	0	0	0	1,254
Other	0	(492)	0	0	0	(492)
Balance at Dec. 31, 2011	242	74,823	(1,182)	93,902	0	167,785
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	0	16,487	0	16,487	[1]
Other comprehensive income (loss)	0	0	0	0	(49)	(49)
Issuance of stock
Shares of restricted stock	0	(515)	515	0	0	0
401k plan contribution	0	582	211	0	0	793
Shares in connection with Valent acquisition	16	14,984	0	0	0	15,000
Restricted stock compensation	0	1,494	0	0	0	1,494
Other	(1)	(529)	(26)	0	0	(556)
Balance at Dec. 31, 2012	$ 257	$ 90,839	$ (482)	$ 110,389	$ (49)	$ 200,954

[1] The fourth quarter of 2012 includes $4,860 in acquisition fees related to Valent.