Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital (APIC)	(Accumulated Deficit) Retained Earnings
Beginning Balance at Dec. 31, 2009	$ 62,339	$ 14	$ 66,504	$ (4,179)
Beginning Balance (in shares) at Dec. 31, 2009		14,187,520
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	10,906			10,906
Warrant exercise (in shares)		1,152,791
Warrant exercise	4,976	1	4,975
Option exercise (in shares)	11,878	11,878
Option exercise	90		90
Restricted stock forfeitures (in shares)		(800)
Restricted stock forfeitures	0
Warrants issued in conjunction with sub-debt	585		585
Stock issued in public offering, net of expenses (in shares)		9,639,090
Stock issued in initial public offering, net of expenses	88,823	10	88,813
Stock issued as part of acquisitions (in shares)		486,554
Stock issued as part of acquisitions	5,472	1	5,471
Stock based compensation (in shares)		77,500
Stock based compensation	1,920		1,920
Ending Balance at Dec. 31, 2010	175,111	26	168,358	6,727
Ending Balance (in shares) at Dec. 31, 2010		25,554,533
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	535			535
Warrant exercise (in shares)		78,455
Warrant exercise	422		422
Option exercise (in shares)	50,296	50,296
Option exercise	434		434
Restricted stock forfeitures (in shares)		(12,000)
Restricted stock forfeitures	0
Restricted stock issuances (in shares)		152,800
Restricted stock issuances	569		569
Stock issued as part of acquisitions (in shares)		372,613
Stock issued as part of acquisitions	4,407		4,407
Stock based compensation (in shares)		0
Stock based compensation	2,260		2,260
Stock repurchase (in shares)		(425,902)
Stock repurchase	(3,079)		(3,079)
Ending Balance at Dec. 31, 2011	180,659	26	173,371	7,262
Ending Balance (in shares) at Dec. 31, 2011		25,770,795
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,015			1,015
Warrant exercise (in shares)		74,669
Warrant exercise	90		90
Option exercise (in shares)	81,674	81,674
Option exercise	648		648
Restricted stock forfeitures (in shares)		(44,400)
Restricted stock forfeitures	(82)		(82)
Restricted stock issuances (in shares)		314,700
Restricted stock issuances	1,021		1,021
Stock issued in secondary offering, net of expenses (in shares)		8,510,000
Stock issued in secondary offering, net of expenses	94,451	8	94,443
Stock issued as part of acquisitions (in shares)		1,824,295
Stock issued as part of acquisitions	24,089	2	24,087
Stock based compensation (in shares)		0
Stock based compensation	2,085		2,085
Stock repurchase (in shares)		(396,191)
Stock repurchase	(2,948)		(2,948)
Ending Balance at Dec. 31, 2012	$ 301,028	$ 36	$ 292,715	$ 8,277
Ending Balance (in shares) at Dec. 31, 2012		36,135,542