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Concentration of Risk (Details) - tenant
9 Months Ended 12 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Concentration Risk [Line Items]    
Number of tenants representing more than 10% of rental revenue 0 0
Maximum [Member] | Tenant Concentration Risk [Member]    
Concentration Risk [Line Items]    
Concentration risk, percentage 10.00% 10.00%