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Commitments and Contingencies - Additional Information (Details)
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
Agreement
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Commitments And Contingencies [Line Items]      
Equity method investment period 3 years    
Percentage of expected non-recourse construction debt 60.00%    
Initial minimum co-investment of combined equity | $ $ 750.0    
Number of joint venture agreements | Agreement 3    
Compensation expense, recognized | $ $ 0.1 $ 0.5 $ 0.4
Number of deferred compensation agreement with former executive officer | Agreement 1    
Equity Residential [Member]      
Commitments And Contingencies [Line Items]      
Ownership Percentage 75.00%    
Toll Brothers Inc. [Member]      
Commitments And Contingencies [Line Items]      
Ownership Percentage 25.00%