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Significant Tenant (Details) (Five Star)
9 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2014
Senior living communities
item
Sep. 30, 2014
Rental income
Rents from significant lessee
Sep. 30, 2014
Investment
Rents from significant lessee
Concentration of credit risk      
Percentage of total rents leased or managed   34.70% 34.50%
Number of properties acquired, referred to as managed properties 44