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Stock-Based Compensation (Stock Option Activity) (Details) - $ / shares
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Stock-Based Compensation [Abstract]    
Beginning balance, Outstanding 16,450 49,700
Beginning balance, Weighted Average Exercise Price $ 10.31 $ 9.18
Issued
Issued, Weighted Average Exercise Price
Exercised 16,450 19,150
Exercised, Weighted Average Exercise Price $ 10.31 $ 7.39
Forfeited
Forfeited, Weighted Average Exercise Price
Expired
Expired, Weighted Average Exercise Price
Ending balance, Outstanding   30,550
Ending balance, Weighted Average Exercise Price   $ 10.31