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Share-Based Payments (Details) - $ / shares
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Number of Shares    
Nonvested options - beginning of period 401,440  
Nonvested options granted 5,000  
Nonvested options vested or forfeited (11,825)  
Nonvested options - end of period 394,615  
Weighted Average Grant Date Fair Value    
Nonvested options - beginning of period $ 7.14  
Nonvested options granted 7.67 $ 6.50
Nonvested options vested or forfeited 6.9  
Nonvested options - end of period $ 7.15