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, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Salaries and benefits | Development/Redevelopment Activities [Member]
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	$ 266	$ 219	$ 541	$ 373
Capitalized Real Estate Taxes [Member] | Development/Redevelopment Activities [Member]
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	6	276	25
Interest | Development/Redevelopment Activities [Member]
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	668	770	1,370	804
Salaries, commissions and benefits | Leasing Activities [Member]
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	$ 1,279	$ 1,573	$ 3,016	$ 3,228