Acquisition and Disposition Activity - Intangible Assets Acquired and Intangible Liabilities Assumed (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Intangible assets carrying value	$ 10,773
Intangible assets acquired and intangible liabilities assumed, weighted average amortization period	5 years 10 months 24 days
In Place Lease Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets carrying value	7,059
Intangible assets acquired and intangible liabilities assumed, weighted average amortization period	5 years
Above Market Lease Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets carrying value	1,769
Intangible assets acquired and intangible liabilities assumed, weighted average amortization period	8 years 8 months 12 days
Lease Commissions, Legal and Marketing Fees [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets carrying value	1,945
Intangible assets acquired and intangible liabilities assumed, weighted average amortization period	5 years
Below Market Lease Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets carrying value	$ (8,595)
Intangible assets acquired and intangible liabilities assumed, weighted average amortization period	8 years 8 months 12 days