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	8,503			8,503
Other comprehensive income (loss)	841				841
Share-based compensation expense	27		27
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 Jun. 30, 2012	96,069	103	76,258	18,549	1,159
Balance (in shares) at Jun. 30, 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	1,723			1,723
Other comprehensive income (loss)	(2,764)				(2,764)
Share-based compensation expense	423		423
Common stock repurchased and retired	(22)		(22)
Common stock repurchased and retired (in shares)		(3,666)
Common stock issued	34,924	29	34,895
Common stock issued (in shares)		2,972,472
Stock options exercised	10		10
Stock options exercised (in shares)		5,332
Balance at Jun. 30, 2013	$ 168,811	$ 166	$ 142,759	$ 27,545	$ (1,659)
Balance (in shares) at Jun. 30, 2013	16,635,786	16,635,786