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Stock-Based Compensation (Stock Option Activity) (Details) - $ / shares
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Stock-Based Compensation [Abstract]    
Balance   16,450
Beginning balance, Weighted Average Exercise Price   $ 10.31
Issued  
Issued, Weighted Average Exercise Price  
Exercised   2,100
Exercised, Weighted Average Exercise Price   $ 10.31
Forfeited  
Forfeited, Weighted Average Exercise Price  
Expired  
Expired, Weighted Average Exercise Price  
Balance 0 14,350
Ending balance, Weighted Average Exercise Price   $ 10.31