Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Summary of Total Operating Revenues and Earnings (Loss) Recognized on Properties Acquired (Detail)

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Real Estate and Intangible Assets - Summary of Total Operating Revenues and Earnings (Loss) Recognized on Properties Acquired (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Real Estate Properties [Line Items]        
Operating Revenues $ 5,994 $ 4,241 $ 11,742 $ 7,921
2017 New Real Estate Activity        
Real Estate Properties [Line Items]        
Operating Revenues 883   1,528  
Earnings (Loss) 429   $ 809  
2017 New Real Estate Activity | Citrus Boulevard        
Real Estate Properties [Line Items]        
Acquisition Date     Jan. 12, 2017  
Operating Revenues 732   $ 1,377  
Earnings (Loss) 430   $ 810  
2017 New Real Estate Activity | Spot Road(4)        
Real Estate Properties [Line Items]        
Acquisition Date     Jun. 01, 2017  
Operating Revenues 141   $ 141  
Earnings (Loss) (5)   $ (5)  
2017 New Real Estate Activity | Poplar Street        
Real Estate Properties [Line Items]        
Acquisition Date     Jun. 02, 2017  
Operating Revenues 10   $ 10  
Earnings (Loss) $ 4   $ 4  
2016 New Real Estate Activity        
Real Estate Properties [Line Items]        
Operating Revenues   582   706
Earnings (Loss)   (54)   (155)
Non-recurring acquisition-related costs   5   $ 89
2016 New Real Estate Activity | Gunbarrel Road        
Real Estate Properties [Line Items]        
Acquisition Date       Mar. 03, 2016
Operating Revenues   398   $ 522
Earnings (Loss)   (51)   $ (152)
2016 New Real Estate Activity | Calaveras Avenue        
Real Estate Properties [Line Items]        
Acquisition Date       Apr. 05, 2016
Operating Revenues   184   $ 184
Earnings (Loss)   $ (3)   $ (3)