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Stock-Based Compensation (Stock Option Activity) (Details) - $ / shares
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Stock-Based Compensation [Abstract]    
Outstanding 64,500 163,586
Weighted Average Exercise Price $ 8.67 $ 15.13
Issued
Issued, Weighted Average Exercise Price
Exercised 95,834
Exercised, Weighted Average Exercise Price $ 19.40
Forfeited
Forfeited, Weighted Average Exercise Price
Expired
Expired, Weighted Average Exercise Price
Outstanding 64,500 67,752
Weighted Average Exercise Price $ 8.67 $ 9.09