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Earnings Per Share - Antidilutive securities excluded from the computation of net income per share (Details) - shares
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-Dilutive Weighted Average Shares Outstanding (in shares) 25,246,777 27,459,976
Holdings limited partnership units    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-Dilutive Weighted Average Shares Outstanding (in shares) 20,069,152 22,584,238
Unvested restricted share-based awards    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-Dilutive Weighted Average Shares Outstanding (in shares) 5,177,625 4,875,738