Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Additional Information (Detail)

v3.7.0.1
Real Estate and Intangible Assets - Additional Information (Detail)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
USD ($)
property
Jun. 30, 2016
USD ($)
property
Jun. 30, 2017
USD ($)
property
Jun. 30, 2016
USD ($)
property
Real Estate Properties [Line Items]        
Number of properties acquired | property 1 1 1 1
Number of leased properties | property     1 3
Total amortization expense related to lease intangible assets $ 3.5 $ 3.3 $ 7.0 $ 6.6
Amortization related to below-market lease 0.3 0.2 0.7 0.5
Above market leases        
Real Estate Properties [Line Items]        
Amortization related to above-market lease 0.1 0.1 0.3 0.2
Building and Tenant Improvements        
Real Estate Properties [Line Items]        
Real estate depreciation expense $ 6.4 $ 5.9 $ 12.8 $ 11.8