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Stock-Based Compensation (Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity) (Details) - Restricted Stock [Member]
6 Months Ended 12 Months Ended
Jun. 30, 2016
$ / shares
shares
Dec. 31, 2015
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Beginning period, nonvested | shares 37,048 29,472
Number of shares, granted | shares 22,403 28,040
Number of shares, vested | shares (15,912) (20,464)
Number of shares, cancelled | shares (658)  
Ending period, nonvested | shares 42,881 37,048
Beginning period, weighted average grant date fair value, nonvested | $ / shares $ 19.83 $ 20.83
Weighted average grant date fair value, granted | $ / shares 20.75 18.63
Weighted average grant date fair value, vested | $ / shares $ 20.09 19.62
Weighted average grant date fair value, cancelled | $ / shares 20.31  
Ending period, weighted average grant date fair value, nonvested | $ / shares $ 20.21 $ 19.83