CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Accumulated Retained Earnings	Accumulated Other Comprehensive Income
Balance at Dec. 31, 2011	$ 86,777	$ 103	$ 76,310	$ 10,046	$ 318
Balance (in shares) at Dec. 31, 2011		10,337,626
Increase (Decrease) in Stockholders' Equity
Net Income	2,692			2,692
Other comprehensive income	81				81
Share-based compensation expense	8		8
Common stock repurchased and retired	(102)		(102)
Common stock repurchased and retired (in shares)		(13,022)
Stock options exercised	23		23
Stock options exercised (in shares)		5,330
Balance at Mar. 31, 2012	89,479	103	76,239	12,738	399
Balance (in shares) at Mar. 31, 2012	10,329,934	10,329,934
Balance at Dec. 31, 2012	134,517	137	107,453	25,822	1,105
Balance (in shares) at Dec. 31, 2012	13,661,648	13,661,648
Increase (Decrease) in Stockholders' Equity
Net Income	1,972			1,972
Other comprehensive income	461				461
Share-based compensation expense	152		152
Common stock repurchased and retired	(22)		(22)
Common stock repurchased and retired (in shares)		(3,666)
Common stock issued	20,499	17	20,482
Common stock issued (in shares)		1,774,217
Stock options exercised	10		10
Stock options exercised (in shares)		5,332
Balance at Mar. 31, 2013	$ 157,589	$ 154	$ 128,075	$ 27,794	$ 1,566
Balance (in shares) at Mar. 31, 2013	15,437,531	15,437,531