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	9,613			9,613
Other comprehensive income	(943)				(943)
Share-based compensation expense	435		435
Common stock issued	72,252	$ 45	72,207
Common stock issued (in shares)		4,480,645
Warrants exercised	689	$ 1	688
Warrant exercise (in shares)		125,196
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 Jun. 30, 2015	281,593	$ 215	220,759	61,044	(425)
Balance (in shares) at Jun. 30, 2015		21,510,558
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	$ 18,923			18,923
Other comprehensive income	1,768				1,768
Share-based compensation expense	1,048		1,048
Issuance of restricted stock (in shares)		218,236
Common stock issued	119,383	$ 58	119,325
Common stock issued (in shares)		5,815,051
Exercise of stock options	528		528
Exercise of stock options (in shares)		46,500
Balance at Jun. 30, 2016	$ 440,630	$ 273	$ 342,388	$ 95,869	$ 2,100
Balance (in shares) at Jun. 30, 2016	27,650,533	27,650,533