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
Jun. 30, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]    
Below market leases and deferred revenue, gross $ (24,207) $ (21,606)
Below market leases and deferred revenue, accumulated amortization 9,626 8,959
Lease Intangibles    
Finite-Lived Intangible Assets [Line Items]    
Intangibles 170,452 169,734
Intangibles, accumulated amortization (69,417) (64,181)
In-place leases    
Finite-Lived Intangible Assets [Line Items]    
Intangibles 71,149 71,482
Intangibles, accumulated amortization (30,343) (28,182)
Leasing costs    
Finite-Lived Intangible Assets [Line Items]    
Intangibles 49,051 48,000
Intangibles, accumulated amortization (20,712) (18,599)
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Intangibles 50,252 50,252
Intangibles, accumulated amortization (18,362) (17,400)
Above market leases and below market leases and deferred revenue    
Finite-Lived Intangible Assets [Line Items]    
Finite-lived intangible assets (liabilities), gross (13,606) (11,127)
Finite-lived intangible assets (liabilities), accumulated amortization 2,075 1,663
Above market leases    
Finite-Lived Intangible Assets [Line Items]    
Intangibles 10,601 10,479
Intangibles, accumulated amortization $ (7,551) $ (7,296)