Secured Financings on Investments in Real Estate Debt - Additional Information (Detail) - USD ($)	1 Months Ended
	Apr. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Weighted Average Interest Rate		1.50%	3.00%
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate		1.40%	1.30%
Barclays MRA [Member]
Debt Instrument [Line Items]
Maximum facility size		$ 750,000,000
DB Secured Financing [Member]
Debt Instrument [Line Items]
Maximum facility size	$ 252,700,000
DB Secured Financing [Member] | Three-month EURIBOR [Member]
Debt Instrument [Line Items]
Weighted Average Interest Rate	1.80%