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Unconsolidated Entities - Summary of Operating Information and Financial Position of Unconsolidated Co-investment Ventures (Parenthetical) (Detail) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Equity Method Investments And Joint Ventures [Abstract]    
Receivables from unconsolidated co-investment ventures $ 143.7 $ 165.6