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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2012 $ 40,988 $ 114 $ 299 $ 41,311 $ (736)
Beginning balance, shares at Dec. 31, 2012   11,387,299      
Tax shortfall associated with stock-based compensation arrangements (3,567) (702) (2,865)
Repurchase of common stock $ (24,999) $ (5) (1,752) $ (23,242)
Repurchase of common stock, shares   (495,085)      
Restricted stock forfeitures and cancellations, net of grants $ (1) 1
Restricted stock forfeitures and cancellations, net of grants, shares   (94,750)      
Stock-based compensation $ 9,291 $ 9,291
Change in fair value of derivative instrument, net of income tax 764 $ 764
Net income 16,425 $ 16,425
Ending balance at Dec. 31, 2013 38,902 $ 108 $ 7,137 $ 31,629 $ 28
Ending balance, shares at Dec. 31, 2013   10,797,464      
Tax shortfall associated with stock-based compensation arrangements $ (2,039) (2,039)
Restricted stock grants, net of forfeitures $ 1 (1)
Restricted stock grants, net of forfeitures, shares   105,877      
Stock-based compensation $ 9,453 $ 9,453
Change in fair value of derivative instrument, net of income tax 60 $ 60
Net income 46,356 $ 46,356
Ending balance at Dec. 31, 2014 92,732 $ 109 $ 14,550 $ 77,985 $ 88
Ending balance, shares at Dec. 31, 2014   10,903,341      
Tax shortfall associated with stock-based compensation arrangements $ (24) (24)
Restricted stock grants, net of forfeitures $ 1 (1)
Restricted stock grants, net of forfeitures, shares   123,836      
Stock-based compensation $ 10,213 $ 10,213
Change in fair value of derivative instrument, net of income tax (88) $ (88)
Net income 40,023 $ 40,023
Ending balance at Dec. 31, 2015 $ 142,856 $ 110 $ 24,738 $ 118,008
Ending balance, shares at Dec. 31, 2015   11,027,177