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)

v2.4.0.8
Real Estate and Intangible Assets - Weighted Average Amortization Period for Intangible Assets Acquired and Liabilities Assumed (Detail)
 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets and liabilities 4 years 2 months 12 days 12 years 8 months 12 days
In-place Leases [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets and liabilities 3 years 8 months 12 days  
Leasing Commissions [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets and liabilities 6 years 3 months 18 days 12 years 8 months 12 days
Customer Relationships [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets and liabilities 6 years 10 months 24 days  
Above-Market Leases [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets and liabilities 3 years  
Below-Market Leases [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
All intangible assets and liabilities 1 year 6 months