Annual report pursuant to Section 13 and 15(d)

Real Estate and Intangible Assets - Weighted Average Amortization Period for Intangible Assets Acquired and Liabilities Assumed (Detail)

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Real Estate and Intangible Assets - Weighted Average Amortization Period for Intangible Assets Acquired and Liabilities Assumed (Detail)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]    
Period for intangible assets and liabilities 14 years 3 months 18 days 11 years 6 months
In-Place Leases [Member]    
Finite-Lived Intangible Assets [Line Items]    
Period for intangible assets and liabilities 13 years 10 years 1 month 6 days
Leasing Costs [Member]    
Finite-Lived Intangible Assets [Line Items]    
Period for intangible assets and liabilities 13 years 10 years 1 month 6 days
Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Period for intangible assets and liabilities 17 years 6 months 15 years 1 month 6 days
Above Market Leases [Member]    
Finite-Lived Intangible Assets [Line Items]    
Period for intangible assets and liabilities 18 years 7 months 6 days 9 years 3 months 18 days
Below Market Leases [Member]    
Finite-Lived Intangible Assets [Line Items]    
Period for intangible assets and liabilities 13 years 6 months 10 years