Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Carrying Value of Intangible Assets and Accumulated Amortization (Detail)

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Real Estate and Intangible Assets - Carrying Value of Intangible Assets and Accumulated Amortization (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]    
Lease Intangibles $ 131,668 $ 114,520
Accumulated Amortization (39,539) (34,888)
In-Place Leases [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Lease Intangibles 56,521 47,442
Accumulated Amortization (17,205) (15,158)
Leasing Costs [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Lease Intangibles 35,251 31,339
Accumulated Amortization (10,680) (9,323)
Customer Relationships [Member]
   
Finite-Lived Intangible Assets [Line Items]    
Lease Intangibles 39,896 35,739
Accumulated Amortization $ (11,654) $ (10,407)