Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Total
Beginning balance at Dec. 31, 2015	$ 110	$ 24,738	$ 118,008	$ 142,856
Beginning balance, shares at Dec. 31, 2015	11,027,177
Tax shortfall associated with stock-based compensation arrangements		(50)		(50)
Restricted stock grants, net of forfeitures	$ 2	(2)
Restricted stock grants, net of forfeitures, shares	137,734
Stock-based compensation		4,926		4,926
Net income			20,206	20,206
Ending balance at Jun. 30, 2016	$ 112	29,612	138,214	167,938
Ending balance, shares at Jun. 30, 2016	11,164,911
Beginning balance at Dec. 31, 2016	$ 111	35,453	152,810	188,374
Beginning balance, shares at Dec. 31, 2016	11,093,489
Restricted stock grants, net of forfeitures	$ 1	(1)
Restricted stock grants, net of forfeitures, shares	73,936
Stock-based compensation		5,654		5,654
Common stock dividends			(5,707)	(5,707)
Net income			20,880	20,880
Ending balance at Jun. 30, 2017	$ 112	$ 41,106	$ 167,983	$ 209,201
Ending balance, shares at Jun. 30, 2017	11,167,425