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Equity-Based Compensation (Equity Based Awards - Settled in Stock) (Details) - Performance stock units - shares
1 Months Ended 9 Months Ended
Feb. 29, 2020
Apr. 30, 2017
Feb. 28, 2017
Sep. 30, 2018
Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Units awarded (in shares)       135,540 108,748
Performance period       1 year  
2015 Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Units awarded that will convert to shares (in shares)     78,482    
Shares to be issued on conversion as percentage of total award     30.00%    
Units awarded (in shares)   10,266 20,000    
Performance period     3 years    
Scenario, Forecast | 2015 Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares to be issued on conversion (in shares) 23,546