Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Total	Common Stock	Additional Paid-in Capital	Retained Earnings
Balance, Beginning at Dec. 31, 2009	$ 66,765	$ 142	$ 46,197	$ 20,426
Balance Beginning, shares at Dec. 31, 2009		14,174,326
Stock issued for deferred compensation	295		295
Stock issued for deferred compensation, shares		88,269
Stock-based compensation	112		112
Amortization of unearned compensation	10		10
Amortization of unearned compensation, shares		3,750
Stock purchase program	(139)		(139)
Stock purchase program, shares		(34,412)
Common stock dividends ($0.20, $0.21, $0.24 for year 2010, 2011, 2012 respectively)	(2,852)			(2,852)
Net income	5,296			5,296
Balance, Ending at Dec. 31, 2010	69,487	142	46,475	22,870
Balance Ending, shares at Dec. 31, 2010		14,231,933
Stock issued for deferred compensation	354	1	353
Stock issued for deferred compensation, shares		77,274
Stock-based compensation	138		138
Stock purchase program	(239)		(239)
Stock purchase program, shares		(51,883)
Common stock dividends ($0.20, $0.21, $0.24 for year 2010, 2011, 2012 respectively)	(3,008)			(3,008)
Net income	8,991			8,991
Balance, Ending at Dec. 31, 2011	75,723	143	46,727	28,853
Balance Ending, shares at Dec. 31, 2011		14,257,324
Stock issued for deferred compensation	346		346
Stock issued for deferred compensation, shares		48,148
Stock-based compensation	191		191
Shares issued upon vesting of restricted stock units		8,380
Warrants exercised		6,367
Stock options exercised	238	2	236
Stock options exercised, shares	150,000	150,000
Common stock dividends ($0.20, $0.21, $0.24 for year 2010, 2011, 2012 respectively)	(3,457)			(3,457)
Net income	9,351			9,351
Balance, Ending at Dec. 31, 2012	$ 82,392	$ 145	$ 47,500	$ 34,747
Balance Ending, shares at Dec. 31, 2012		14,470,219