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Stock Based Compensation (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of shares authorized         3,000,000  
Tax benefit recorded to additional paid in capital     $ 136,000 $ 16,000    
Weighted Average Grant Date Fair Value of Restricted Stock            
Shares Paid for Tax Withholding for Share Based Compensation     19,533 10,590    
Forfeiture Rate, Minimum     3.50%      
Forfeiture Rate, Maximum     6.50%      
Restricted Stock [Member]            
Restricted Stock Rollforward, Shares            
Unvested balance at December 31, 2016     158,261      
Granted     84,643      
Vested     (95,717)      
Forfeited     (6,092)      
Unvested balance at Period End 141,095   141,095      
Weighted Average Grant Date Fair Value of Restricted Stock            
Unvested balance at December 31, 2016, USD per share $ 16.84   $ 16.84   $ 16.84 $ 14.55
Granted, USD per share     19.17      
Vested, USD per share     15.12      
Forfeited, USD per share     17.93      
Unvested balance at Period End, USD per share $ 16.84   $ 16.84      
Unrecognized compensation expense   $ 1,580,000   $ 1,580,000 $ 1,871,000  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 1 year 7 months          
Restricted Stock [Member] | Selling, General and Administrative Expenses [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Compensation costs $ 270,000 $ 197,000 $ 1,061,000 $ 778,000