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SIGNIFICANT ACCOUNTING POLICIES (Details 5) (USD $)
12 Months Ended
Dec. 31, 2013
item
property
Dec. 31, 2012
Dec. 31, 2011
Concentration of Credit Risk      
Number of states in which properties are located 29    
Number of real estate investments 109    
Rental revenues $ 50,979,000 $ 43,793,000 $ 40,874,000
Rental income | Geographic concentration | Texas
     
Concentration of Credit Risk      
Concentration risk percentage 13.00% 10.80% 12.80%
Rental income | Geographic concentration | New York
     
Concentration of Credit Risk      
Concentration risk percentage 11.00% 12.80% 13.80%
Rental income | Geographic concentration | New Jersey
     
Concentration of Credit Risk      
Concentration risk percentage 10.70% 8.30% 5.90%
Rental income | Geographic concentration | Pennsylvania
     
Concentration of Credit Risk      
Concentration risk percentage 8.80% 10.10% 10.80%
Rental income | Customer concentration | Haverty Furniture Companies, Inc.
     
Concentration of Credit Risk      
Number of states in which properties are located 6    
Concentration risk percentage 9.50% 11.10% 11.90%
Number of real estate investments 11    
Real estate investments (as a percent) 9.50%    
Rental revenues $ 4,844,000 $ 4,844,000 $ 4,844,000