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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Preferred Stock
Common Stock
Additional Paid-In Capital
Retained Earnings
Preferred stock, shares outstanding, beginning of period at Dec. 31, 2013   0      
Common stock, shares outstanding, beginning of period at Dec. 31, 2013     12,366,000    
Balance, beginning of period at Dec. 31, 2013 $ 192,737 $ 0 $ 123 $ 91,344 $ 101,270
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of common stock options, shares     3,000    
Exercise of common stock options 59     59  
Compensation expense on common stock options 426     426  
Issuance of restricted stock, shares     97,000    
Issuance of restricted stock 0        
Tax benefit (expense) of equity compensation 419     419  
Compensation expense on restricted common stock 2,818   $ 1 2,817  
Net income 14,128       14,128
Common stock, shares outstanding, end of period at Dec. 31, 2014     12,466,000    
Balance, end of period at Dec. 31, 2014 210,587   $ 124 95,065 115,398
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of common stock options, shares     66,000    
Exercise of common stock options 776   $ 1 775  
Compensation expense on common stock options 601     601  
Issuance of restricted stock, shares     71,000    
Issuance of restricted stock 0        
Tax benefit (expense) of equity compensation (379)     (379)  
Compensation expense on restricted common stock 2,944   $ 1 2,943  
Taxes paid related to net shares settlement of equity awards (695)     (695)  
Net income $ 10,147       10,147
Preferred stock, shares outstanding, end of period at Dec. 31, 2015 0 0      
Common stock, shares outstanding, end of period at Dec. 31, 2015 12,603,000   12,603,000    
Balance, end of period at Dec. 31, 2015 $ 223,981 $ 0 $ 126 98,310 125,545
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of common stock options, shares     62,000    
Exercise of common stock options 1,042   $ 1 1,041  
Compensation expense on common stock options 506     506  
Issuance of restricted stock, shares     99,000    
Issuance of restricted stock 0        
Tax benefit (expense) of equity compensation 72     72  
Compensation expense on restricted common stock 1,793   $ 1 1,792  
Taxes paid related to net shares settlement of equity awards (909)     (909)  
Net income $ 6,469       6,469
Preferred stock, shares outstanding, end of period at Dec. 31, 2016 0 0      
Common stock, shares outstanding, end of period at Dec. 31, 2016 12,764,000   12,764,000    
Balance, end of period at Dec. 31, 2016 $ 232,954 $ 0 $ 128 $ 100,812 $ 132,014