Real Estate Activities - Summary of Capitalized Salaries, Commissions and Benefits, Real Estate Taxes and Interest (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Interest | Development/Redevelopment Activities:
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	$ 2,004	$ 1,625
Compensation, including commissions | Development/Redevelopment Activities:
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	352	438
Real estate taxes | Development/Redevelopment Activities:
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	76	164
Compensation, including commissions(1) | Leasing Activities:
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	$ 320	$ 2,172