Aggregate Principal Amounts due on Mortgage and Construction Notes Payable by Unconsolidated LLC's/LPs Accounted Under Equity Method (Detail) - Equity Method Investments - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Dec. 31, 2021
Schedule Of Equity Method Investments [Line Items]
Mortgage Loan Balance	[1]	$ 22,000	$ 22,068
Grayson Properties II LP
Schedule Of Equity Method Investments [Line Items]
Mortgage Loan Balance	[1],[2]	$ 13,075	13,075
Debt Instrument Maturity Date	[2]	2025-06
Brunswick Associates
Schedule Of Equity Method Investments [Line Items]
Mortgage Loan Balance	[1]	$ 8,925	$ 8,993
Debt Instrument Maturity Date		2030-12

[1] All mortgage loans require monthly principal payments through maturity and include a balloon principal payment upon maturity.

[2] This construction loan has a maximum commitment of $13.1 million and requires interest on the outstanding principal balance to be paid on a monthly basis through December 1, 2022.  Monthly principal and interest payments are scheduled to commence on January 1, 2023.