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Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock [Member]
Additional Paid-in-Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Beginning Balance at Dec. 31, 2013 $ 161,173 $ 1,265 $ 83,317 $ 76,591  
Beginning Balance, shares at Dec. 31, 2013   12,652      
Issuance of restricted stock awards   $ 7 (7)    
Issuance of restricted stock awards, shares   73      
Exercise of stock options 123 $ 5 118    
Exercise of stock options, shares   46      
Excess tax benefit (deficiency) from stock option exercises, net 161   161    
Shares withheld related to net share settlement (196) $ (2) (194)    
Shares withheld related to net share settlement, shares   (23)      
Share-based compensation 2,260   2,260    
Net income 14,802     14,802  
Ending Balance at Dec. 31, 2014 178,323 $ 1,275 85,655 91,393  
Ending Balance, shares at Dec. 31, 2014   12,748      
Issuance of restricted stock awards   $ 11 (11)    
Issuance of restricted stock awards, shares   108      
Exercise of stock options 14 $ 14      
Exercise of stock options, shares   145      
Excess tax benefit (deficiency) from stock option exercises, net 378   378    
Shares withheld related to net share settlement (543) $ (9) (534)    
Shares withheld related to net share settlement, shares   (87)      
Share-based compensation 3,690   3,690    
Net income 23,365     23,365  
Ending Balance at Dec. 31, 2015 205,227 $ 1,291 89,178 114,758  
Ending Balance, shares at Dec. 31, 2015   12,914      
Issuance of restricted stock awards   $ 4 (4)    
Issuance of restricted stock awards, shares   37      
Exercise of stock options $ 20 $ 20      
Exercise of stock options, shares 203 203      
Excess tax benefit (deficiency) from stock option exercises, net $ (35)   (35)    
Repurchase of common stock (25,046)       $ (25,046)
Shares withheld related to net share settlement (508) $ (15) (493)    
Shares withheld related to net share settlement, shares   (158)      
Share-based compensation 3,786   3,786    
Net income 24,031     24,031  
Ending Balance at Dec. 31, 2016 $ 207,475 $ 1,300 $ 92,432 $ 138,789 $ (25,046)
Ending Balance, shares at Dec. 31, 2016   12,996