Real Estate Activities - Summary of Capitalized Salaries, Commissions and Benefits, Real Estate Taxes and Interest (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest | Development/Redevelopment Activities:
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	$ 489	$ 2,683	$ 1,844	$ 7,012
Compensation | Development/Redevelopment Activities:
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	25	281	416	969
Real estate taxes | Development/Redevelopment Activities:
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	$ 29	524	255	945
Compensation, including commissions(1) | Leasing Activities:
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost		$ 108	$ 164	$ 413