CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2013	$ 175,226	$ 166	$ 143,322	$ 34,815	$ (3,077)
Balance (in shares) at Dec. 31, 2013		16,656,279
Increase (Decrease) in Stockholders' Equity
NET INCOME	16,616			16,616
Other comprehensive income (loss)	3,595				3,595
Share-based compensation expense	514		514
Issuance of common stock	9,012	$ 6	9,006
Issuance of common stock (in shares)		562,469
Repurchase of common stock	(5,638)	$ (4)	(5,634)
Repurchase of common stock (in shares)		(447,450)
Exercise of stock options	267	$ 1	266
Exercise of stock options (in shares)		132,586
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	25,515			25,515
Other comprehensive income (loss)	(186)				(186)
Share-based compensation expense	1,165		1,165
Issuance of restricted stock, net	0
Issuance of restricted stock, net (in shares)		60,000
Issuance of common stock	72,252	$ 45	72,207
Issuance of common stock (in shares)		4,480,645
Warrants exercised	689	$ 1	688
Warrants exercised (in shares)		125,316
Repurchase of common stock	(116)		(116)
Repurchase of common stock (in shares)		(7,165)
Exercise of stock options	69		69
Exercise of stock options (in shares)		8,066
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	$ 40,103			40,103
Other comprehensive income (loss)	(3,053)				(3,053)
Share-based compensation expense	2,729		2,729
Issuance of restricted stock, net	0
Issuance of restricted stock, net (in shares)		296,236
Issuance of common stock	119,383	$ 58	119,325
Issuance of common stock (in shares)		5,815,051
Tax effect of share-based compensation	379		379
Repurchase of common stock	(126)		(126)
Exercise of stock options	1,345	$ 1	1,344
Exercise of stock options (in shares)		116,250
Balance at Dec. 31, 2016	$ 459,740	$ 274	$ 345,138	$ 117,049	$ (2,721)
Balance (in shares) at Dec. 31, 2016	27,798,283	27,798,283