ACQUISITIONS - Intangible Assets Recorded in Connection With Acquisitions (Detail) (USD $)	9 Months Ended
	Sep. 30, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets acquired	$ 69,793
Leases, Acquired-in-Place [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets acquired	35,718	[1]
Weighted Average Amortization Period (in Years)	6 years
Tenant relations [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total intangible assets acquired	$ 34,075
Weighted Average Amortization Period (in Years)	10 years 7 months 6 days

[1] Includes above-market leases valued at $8.1 million.