Quarterly report pursuant to Section 13 or 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)
 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted-Average Amortization Period 7 years 6 days 14 years
Leasehold interest – land    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted-Average Amortization Period 6 years 11 months  
In-place leases    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted-Average Amortization Period 6 years 3 months 15 days 8 years 8 months 12 days
Leasing costs    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted-Average Amortization Period 8 years 9 months 24 days 10 years 7 months 6 days
Above-market lease values    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted-Average Amortization Period 2 years 30 days  
Below-market lease values and deferred revenue    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted-Average Amortization Period 4 years 8 months 16 days 20 years 10 months 24 days