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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Significant Accounting Policies [Line Items]    
Advisor fees on gross offering proceeds 1.00%  
Gross offering proceeds $ 3,483  
Cost incurred by advisor 4,478  
Cost reimbursed 35  
Mortgage indebtedness, carrying value 92,360 92,413
Taxable income distributable to stockholders 90.00%  
Building and Building Improvements
   
Significant Accounting Policies [Line Items]    
Useful life 40 years  
Equipment and fixtures | Minimum
   
Significant Accounting Policies [Line Items]    
Useful life 5 years  
Equipment and fixtures | Maximum
   
Significant Accounting Policies [Line Items]    
Useful life 10 years  
Mortgages
   
Significant Accounting Policies [Line Items]    
Mortgage indebtedness, fair value $ 92,876 $ 95,827