Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2008	$ 57,021	$ 957	$ (2,069)	$ 45,894	$ (1,072)	$ 11,652	$ 1,659
Common Stock, Shares at Dec. 31, 2008		15,075,706
Treasury Stock, Shares at Dec. 31, 2008			(525,000)
Net income	11,584					11,558	26
Net Income (Loss) Attributable to Parent	11,558
Proceeds from Sale of Treasury Stock	(3,875)		1,893	(1,982)
Change in unrealized gains (losses), net of tax	2,680				2,679	0	1
Comprehensive income	14,264				2,679	11,558	27
Payments of Dividends, Noncontrolling Interest	(211)						(211)
Stock-based compensation	209			209
Stock Issued During Period, Value, Employee Stock Purchase Plan	0
Treasury Stock, Value, Acquired, Cost Method	3,875
Treasury Stock, Retired, Cost Method, Amount			480,422
Options exercised, net of forfeitures, shares		15,750
Options exercised, net of forfeitures	24	1		23
Issuance of common stock, shares		695,457
Issuance of common stock	(5,611)	(44)		(5,567)
Balance at Dec. 31, 2009	80,793	1,002	(176)	53,675	1,607	23,210	1,475
Common Stock, Shares at Dec. 31, 2009		15,786,913
Treasury Stock, Shares at Dec. 31, 2009			(44,578)
Net income	16,223					16,203	20
Net Income (Loss) Attributable to Parent	16,203
Change in unrealized gains (losses), net of tax	754				686	0	68
Comprehensive income	16,977				686	16,203	88
Change in par value		(844)		844
Stock-based compensation shares		160,000
Stock-based compensation	176	2		174
Stock Issued During Period, Value, Employee Stock Purchase Plan	0
Treasury Stock, Value, Acquired, Cost Method	0
Redemption of minority interest	(860)						(860)
Options exercised, net of forfeitures, shares		44,185
Options exercised, net of forfeitures	203			203
Conversion of Class A common stock	(14,105)					(14,105)
Issuance of common stock, shares		4,265,637
Issuance of common stock	40,703	43		40,660
Balance at Dec. 31, 2010	123,887	203		95,556	2,293	25,308	703
Common Stock, Shares at Dec. 31, 2010	20,256,735	20,256,735
Treasury Stock, Shares at Dec. 31, 2010	(44,578)
Initial public offering costs	(826)			(826)
Balance at Sep. 30, 2011
Balance at Dec. 31, 2010	123,887	203	(176)	95,556	2,293	25,308	703
Common Stock, Shares at Dec. 31, 2010	20,256,735	20,256,735
Treasury Stock, Shares at Dec. 31, 2010	(44,578)		(44,578)
Net income	14,344				0		(170)
Net Income (Loss) Attributable to Parent	14,514					14,514
Unrealized gain (loss) on swap, net of tax	(2,341)				(2,341)	0	0
Change in unrealized gains (losses), net of tax	(1,707)				(1,706)	0	(1)
Comprehensive income	10,296				(4,047)	14,514	(171)
Stock-based compensation	763			763
Stock Issued During Period, Shares, Employee Stock Purchase Plans	10,167
Stock Issued During Period, Value, Employee Stock Purchase Plan	58			(58)
Treasury Stock, Shares, Acquired			(471,554)
Treasury Stock, Value, Acquired, Cost Method	(2,552)		(2,552)
Options exercised, net of forfeitures, shares		294,426
Options exercised, net of forfeitures	651	3		648
Balance at Dec. 31, 2011	$ 132,277	$ 206	$ (2,728)	$ 96,199	$ (1,754)	$ 39,822	$ 532
Common Stock, Shares at Dec. 31, 2011	20,561,328	20,561,328
Treasury Stock, Shares at Dec. 31, 2011	(516,132)		(516,132)