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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, 2013 $ 108 $ 7,137 $ 31,629 $ 28 $ 38,902
Beginning 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 $ 109 14,550 77,985 88 92,732
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 $ 110 24,738 118,008   142,856
Ending balance, shares at Dec. 31, 2015 11,027,177        
Tax shortfall associated with stock-based compensation arrangements   (51)     (51)
Restricted stock grants, net of forfeitures $ 1 (1)      
Restricted stock grants, net of forfeitures, shares 66,312        
Stock-based compensation   10,767     10,767
Net income     34,802   34,802
Ending balance at Dec. 31, 2016 $ 111 $ 35,453 $ 152,810   $ 188,374
Ending balance, shares at Dec. 31, 2016 11,093,489