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, 2012	$ 134,517	$ 137	$ 107,453	$ 25,822	$ 1,105
Balance (in shares) at Dec. 31, 2012		13,661,648
Increase (Decrease) in Stockholders' Equity
Net income	4,789			4,789
Other comprehensive income	(3,742)				(3,742)
Share-based compensation expense	680		680
Common stock repurchased and retired	(41)		(41)
Common stock repurchased and retired (in shares)		(10,960)
Common stock issued	34,924	29	34,895
Common stock issued (in shares)		2,972,472
Stock options exercised	27		27
Stock options exercised (in shares)		18,831
Balance at Sep. 30, 2013	171,154	166	143,014	30,611	(2,637)
Balance (in shares) at Sep. 30, 2013	16,641,991	16,641,991
Balance at Dec. 31, 2013	175,226	166	143,322	34,815	(3,077)
Balance (in shares) at Dec. 31, 2013	16,656,279	16,656,279
Increase (Decrease) in Stockholders' Equity
Net income	12,725			12,725
Other comprehensive income	3,161				3,161
Share-based compensation expense	377		377
Common stock repurchased and retired	(2,757)	(2)	(2,755)
Common stock repurchased and retired (in shares)		(262,897)
Common stock issued	9,012	6	9,006
Common stock issued (in shares)		562,469
Stock options exercised	113	1	112
Stock options exercised (in shares)		113,365
Balance at Sep. 30, 2014	$ 197,857	$ 171	$ 150,062	$ 47,540	$ 84
Balance (in shares) at Sep. 30, 2014	17,069,216	17,069,216