CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Retained Earnings	Accumulated Other Comprehensive Income
Balance at Dec. 31, 2014	$ 199,592	$ 169	$ 147,474	$ 51,431	$ 518
Balance (in shares) at Dec. 31, 2014		16,903,884
Increase (Decrease) in Stockholders' Equity
Net income	1,789			1,789
Other comprehensive income	767				767
Share-based compensation expense	200		200
Common stock issued	70,929	$ 45	70,884
Common stock issued (in shares)		4,480,645
Warrants exercised	15	$ 0	15
Warrant exercise (in shares)		2,456
Repurchase of common stock	(93)		(93)
Repurchase of common stock (in shares)		(5,833)
Exercise of stock options	48	$ 0	48
Exercise of stock options (in shares)		6,666
Balance at Mar. 31, 2015	$ 273,247	$ 214	218,528	53,220	1,285
Balance (in shares) at Mar. 31, 2015	21,387,818	21,387,818
Balance at Dec. 31, 2015	$ 298,980	$ 215	221,487	76,946	332
Balance (in shares) at Dec. 31, 2015	21,570,746	21,570,746
Increase (Decrease) in Stockholders' Equity
Net income	$ 8,554			8,554
Other comprehensive income	1,129				1,129
Share-based compensation expense	461		461
Issuance of restricted stock (in shares)		118,936
Common stock issued	119,383	$ 58	119,325
Common stock issued (in shares)		5,815,051
Exercise of stock options	387		387
Exercise of stock options (in shares)		32,500
Balance at Mar. 31, 2016	$ 428,894	$ 273	$ 341,660	$ 85,500	$ 1,461
Balance (in shares) at Mar. 31, 2016	27,537,233	27,537,233