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Commitments and Contingencies (Details)
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
Capital Addition Purchase Commitments  
Loss Contingencies  
Commitment to fund amount $ 153.9
Revolving Credit Facility | Unsecured debt  
Loss Contingencies  
Letters of credit outstanding 2.8
Real Estate Technology Venture Capital Fund  
Loss Contingencies  
Commitment to fund amount 28.0
Contributions to date 16.4
Amount remaining to be contributed $ 11.6