Quarterly report pursuant to Section 13 or 15(d)

Real Estate and Intangible Assets - Schedule of Revenue and Earnings Recognized on Properties Acquired (Detail)

v3.5.0.2
Real Estate and Intangible Assets - Schedule of Revenue and Earnings Recognized on Properties Acquired (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Business Acquisition [Line Items]        
Rental Revenue $ 464 $ 1,762 $ 603 $ 2,971
Earnings (82) (71) (203) $ 166
Richardson, TX [Member]        
Business Acquisition [Line Items]        
Real estate acquisition costs     100  
Acquisition Date       Mar. 06, 2015
Rental Revenue   656   $ 1,496
Earnings   (57)   $ (22)
Birmingham, AL [Member]        
Business Acquisition [Line Items]        
Real estate acquisition costs     80  
Acquisition Date       Mar. 20, 2015
Rental Revenue   83   $ 177
Earnings   (28)   $ 6
Columbus, OH [Member]        
Business Acquisition [Line Items]        
Real estate acquisition costs     70  
Acquisition Date       May 28, 2015
Rental Revenue   177   $ 244
Earnings   (28)   $ 32
Salt Lake City UT [Member]        
Business Acquisition [Line Items]        
Real estate acquisition costs     $ 100  
Acquisition Date     May 26, 2016 May 29, 2015
Rental Revenue 358 572 $ 497 $ 780
Earnings (22) 14 (143) $ 122
Atlanta, GA [Member]        
Business Acquisition [Line Items]        
Real estate acquisition costs 100   100  
Acquisition Date       Jul. 15, 2015
Rental Revenue   274   $ 274
Earnings   $ 28   $ 28
Fort Lauderdale, FL [Member]        
Business Acquisition [Line Items]        
Real estate acquisition costs 70   $ 70  
Acquisition Date     Sep. 12, 2016  
Rental Revenue 106   $ 106  
Earnings $ (60)   $ (60)