Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Total
Beginning balance at Dec. 31, 2014	$ 109	$ 14,550	$ 77,985	$ 88	$ 92,732
Beginning balance, shares at Dec. 31, 2014	10,903,341
Tax shortfall associated with stock-based compensation arrangements		(25)			(25)
Restricted stock grants, net of forfeitures and conversions	$ 1	(1)
Restricted stock grants, net of forfeitures and conversions, shares	124,924
Stock-based compensation		4,923			4,923
Change in fair value of derivative instrument, net of income tax				(233)	(233)
Net income			23,259		23,259
Ending balance at Jun. 30, 2015	$ 110	19,447	101,244	(145)	120,656
Ending balance, shares at Jun. 30, 2015	11,028,265
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 and conversions	$ 2	(2)
Restricted stock grants, net of forfeitures and conversions, 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