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Stock-Based Compensation (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Oct. 16, 2013
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Stock Based Compensation [Abstract]        
Increase in number of common stock shares authorized 233,334      
Percentage to retain annual restricted stock awards 50.00%      
Stock options exercise price description may not be exercised at a price which is less than 100% of the fair market value of shares at the date of grant.      
Intrinsic value of stock options exercised   $ 1,120,153 $ 100,300 $ 155,500
Proceeds from stock options exercised   101,200 291,600 311,500
Weighted average grant date fair value of restricted stock that vested during   1,522,000 769,000 99,000
Net value of unrecognized compensation cost related to unvested restricted stock awards   3,993,000 3,526,000 2,210,000
Restricted stock [Member]        
Stock Based Compensation [Abstract]        
Stock-Based Compensation expense   1,655,000 826,000 135,000
Recognized tax benefits   $ 662,000 $ 330,000 $ 53,000
Common Class A [Member] | Convert For Class B [Member]        
Stock Based Compensation [Abstract]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 280,000      
Common Class A [Member] | Stock Option [Member]        
Stock Based Compensation [Abstract]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 900,000      
Common Class A [Member] | Incentive Compensation Plan [Member]        
Stock Based Compensation [Abstract]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 620,000      
Common Class B [Member] | Stock Option [Member]        
Stock Based Compensation [Abstract]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 280,000