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Commitments and Contingencies (Details) - USD ($)	Oct. 05, 2018	Dec. 31, 2019
Real Estate Technology Venture Capital Fund
Loss Contingencies
Commitment to fund amount	$ 20,000,000.0
Contributions to date		$ 2,800,000
Amount remaining to be contributed		17,200,000
Revolving Credit Facility | Unsecured Debt
Loss Contingencies
Letters of credit outstanding		$ 3,400,000

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