Commitments and Contingencies - Additional Information (Details) $ in Millions	Jun. 30, 2020 USD ($)
Greens of Pine Glen [Member]
Commitments And Other Guarantees [Line Items]
Percentage of loss contingency, range of possible loss, maximum	75.00%
Midland, TX [Member] | Scharbauer Flats Apartments [Member]
Commitments And Other Guarantees [Line Items]
Property loan commitment	$ 24.2
Property loan remaining maximum commitment	$ 22.5