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)

v3.3.0.814
Real Estate and Intangible Assets - Weighted Average Amortization Period for Intangible Assets Acquired and Liabilities Assumed (Detail)
 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets, Amortization Period (in Years) 6 years 2 months 12 days 4 years 2 months 12 days
In-place Leases [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets, Amortization Period (in Years) 4 years 1 month 6 days 3 years 8 months 12 days
Leasing Commissions [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets, Amortization Period (in Years) 5 years 6 months 6 years 3 months 18 days
Tenant Relationships [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets, Amortization Period (in Years) 9 years 6 months 6 years 10 months 24 days
Above-Market Lease Values [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets, Amortization Period (in Years)   3 years
Above (Below)-Market Leases [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets, Amortization Period (in Years)   1 year 6 months