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Stock Based Compensation, Stock Incentive Plan (Details) - Stock Incentive Plan [Member] - shares
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Stock Based Compensation [Abstract]        
Number of shares authorized (in shares) 350,000   350,000  
Stock Options [Member]        
Stock Based Compensation [Abstract]        
Award vesting period     3 years  
Stock options granted (in shares) 0 0 0 0
Stock options outstanding (in shares) 0 0 0 0
Stock Options [Member] | Minimum [Member]        
Stock Based Compensation [Abstract]        
Exercise price of options as percentage of market price     100.00%  
Stock Options [Member] | Maximum [Member]        
Stock Based Compensation [Abstract]        
Award term     10 years