Annual report pursuant to Section 13 and 15(d)

Real Estate and Intangible Assets - Fair Value of Acquired Assets and Liabilities Assumed (Detail)

v3.6.0.2
Real Estate and Intangible Assets - Fair Value of Acquired Assets and Liabilities Assumed (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]    
Total Purchase Price on all Acquisitions $ 66,570 $ 77,798
Business Combinations [Member]    
Business Acquisition [Line Items]    
Total Purchase Price on all Acquisitions 40,900 77,798
Asset Acquisitions [Member]    
Business Acquisition [Line Items]    
Total Purchase Price on all Acquisitions 25,670 0
Customer Relationships [Member] | Business Combinations [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 3,090 5,408
Customer Relationships [Member] | Asset Acquisitions [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 1,406 0
Above Market Leases [Member] | Business Combinations [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 0 1,712
Above Market Leases [Member] | Asset Acquisitions [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 188 0
Below Market Leases [Member] | Business Combinations [Member]    
Business Acquisition [Line Items]    
Liabilities Assumed (281) (1,246)
Land [Member] | Business Combinations [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 7,125 10,528
Land [Member] | Asset Acquisitions [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 3,681 0
Building and Improvements [Member] | Business Combinations [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 22,934 42,652
Building and Improvements [Member] | Asset Acquisitions [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 11,682 0
Tenant Improvements [Member] | Business Combinations [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 3,240 6,996
Tenant Improvements [Member] | Asset Acquisitions [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 4,057 0
In-Place Leases [Member] | Business Combinations [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 3,355 7,410
In-Place Leases [Member] | Asset Acquisitions [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 2,669 0
Leasing Costs [Member] | Business Combinations [Member]    
Business Acquisition [Line Items]    
Total Purchase Price 1,437 4,338
Leasing Costs [Member] | Asset Acquisitions [Member]    
Business Acquisition [Line Items]    
Total Purchase Price $ 1,987 $ 0