Real Estate Activities - Summary of Capitalized Salaries, Commissions and Benefits, Real Estate Taxes and Interest (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Development/Redevelopment Activities [Member] | Salaries and benefits [Member]
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	$ 136	$ 349	$ 313	$ 482
Development/Redevelopment Activities [Member] | Real estate taxes [Member]
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost		92		485
Development/Redevelopment Activities [Member] | Interest [Member]
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	213	557	289	1,105
Leasing Activities [Member] | Salaries, commissions and benefits [Member]
Real Estate Capitalized Costs [Line Items]
Real estate capitalized cost	$ 1,185	$ 1,176	$ 2,722	$ 2,501