Real Estate Activities - Summary of Capitalized Salaries, Commissions and Benefits, Real Estate Taxes and Interest (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Interest | Development/Redevelopment Activities:
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	$ 17	$ 445	$ 147	$ 1,355
Compensation | Development/Redevelopment Activities:
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	25	47	62	391
Real estate taxes | Development/Redevelopment Activities:
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	29	$ 226	58	423
Compensation, including commissions(1) | Leasing Activities:
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	$ 27		$ 27	$ 164