Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Additional Information (Detail)

v3.3.0.814
Subsequent Events - Additional Information (Detail)
$ in Thousands
9 Months Ended
Oct. 20, 2015
USD ($)
ft²
Option
Tenants
Oct. 02, 2015
USD ($)
ft²
Sep. 30, 2015
USD ($)
ft²
Tenants
Sep. 30, 2014
USD ($)
ft²
Subsequent Event [Line Items]        
Acquired area of real estate property | ft²     429,427 1,406,054
Lease expiration date     Dec. 31, 2015  
Straight line rents     $ 3,034 $ 2,808
Extended lease term maturity date     Mar. 31, 2019  
Atlanta, GA [Member]        
Subsequent Event [Line Items]        
Acquired area of real estate property | ft²     78,151  
Percentage of building occupied by tenant     100.00%  
Number of tenant | Tenants     1  
Subsequent Event [Member]        
Subsequent Event [Line Items]        
Acquired area of real estate property | ft²   1,427    
Extended lease term   3 years    
Straight line rents   $ 20    
Subsequent Event [Member] | Atlanta, GA [Member]        
Subsequent Event [Line Items]        
Acquired area of real estate property | ft² 90,626      
Acquisition price of real estate property $ 6,600      
Acquisition expenses 100      
Issuance of mortgage debt on property $ 3,800      
Percentage of building occupied by tenant 100.00%      
Number of tenant | Tenants 1      
Lease expiration period 18 years      
Number of options for renewal of lease | Option 2      
Renew the lease for additional periods 5 years      
Annualized straight line rent escalations $ 600      
Average cap rate 9.20%