Quarterly report pursuant to Section 13 or 15(d)

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

v2.4.0.8
Real Estate and Intangible Assets - Schedule of Revenue and Earnings Recognized on Properties Acquired (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Business Acquisition [Line Items]        
Rental Revenue $ 896 $ 502 $ 910 $ 508
Earnings 431 233 440 236
Allen, TX [Member]
       
Business Acquisition [Line Items]        
Acquisition Date     Mar. 27, 2014  
Rental Revenue 142   150  
Earnings 81   86  
Colleyville, TX [Member]
       
Business Acquisition [Line Items]        
Acquisition Date     Mar. 27, 2014  
Rental Revenue 117   123  
Earnings 67   71  
Rancho Cordova, CA [Member]
       
Business Acquisition [Line Items]        
Acquisition Date     Apr. 22, 2014  
Rental Revenue 173   173  
Earnings 65   65  
Coppell, TX [Member]
       
Business Acquisition [Line Items]        
Acquisition Date     May 08, 2014  
Rental Revenue 89   89  
Earnings 52   52  
Columbus, OH [Member]
       
Business Acquisition [Line Items]        
Acquisition Date     May 13, 2014  
Rental Revenue 167   167  
Earnings 68   68  
Taylor, PA [Member]
       
Business Acquisition [Line Items]        
Acquisition Date     Jun. 09, 2014  
Rental Revenue 208   208  
Earnings 98   98  
Egg Harbor Township, NJ [Member]
       
Business Acquisition [Line Items]        
Acquisition Date       Mar. 28, 2013
Rental Revenue   122   128
Earnings   69   72
Vance, AL [Member]
       
Business Acquisition [Line Items]        
Acquisition Date       May 08, 2013
Rental Revenue   170   170
Earnings   70   70
Blaine, MN [Member]
       
Business Acquisition [Line Items]        
Acquisition Date       May 10, 2013
Rental Revenue   210   210
Earnings   $ 94   $ 94