Annual report pursuant to Section 13 and 15(d)

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

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Real Estate and Lease Intangibles - Weighted Average Amortization Period for Intangible Assets Acquired and Liabilities Assumed (Detail)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets 6 years 2 months 12 days 3 years 3 months 18 days
In-place Leases [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets 4 years 1 month 6 days 2 years 2 months 12 days
Leasing Costs [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets 5 years 6 months 5 years
Tenant Relationships [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets 9 years 6 months 4 years 8 months 12 days
Above-Market Lease Values [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets   3 years
Below Market Leases and Sale Inducements [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets 6 years 2 months 12 days 1 year 6 months