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Stock Repurchases (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Equity [Abstract]        
Number of shares authorized to be repurchased 500,000 500,000 500,000 500,000
Shares repurchased 0 41,846 15,547 41,846
Remaining number of shares available for repurchase 484,453   484,453