Real Estate Activities - Summary of Capitalized Salaries, Commissions and Benefits, Real Estate Taxes and Interest (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Interest | Development/Redevelopment Activities:
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	$ 130	$ 910
Compensation | Development/Redevelopment Activities:
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	37	344
Real estate taxes | Development/Redevelopment Activities:
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	$ 29	197
Compensation, including commissions(1) | Leasing Activities:
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost		$ 164