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Subsequent Events (Details) (USD $)
0 Months Ended
Mar. 31, 2014
Mar. 31, 2014
Giant Center
Apr. 24, 2014
Subsequent Event
Olney Center
sqft
Apr. 29, 2014
Subsequent Event
Giant Center
sqft
Apr. 24, 2014
Subsequent Event
1582 Rockville Pike
sqft
Subsequent Event [Line Items]          
Purchase price         $ 11,000,000
Area of real estate property (in sq ft)     53,765 70,040 40,700
Location of property     Olney, Maryland Milford Mill, Maryland Rockville, Maryland
Proceeds from sale of real estate     11,000,000 7,500,000  
Property acquisition costs         183,000
Lease term     20 years    
Assets held-for-sale   500,000      
Liabilities of assets held-for-sale $ 100,000 $ 100,000