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Significant Tenant	9 Months Ended
Significant Tenant	Sep. 30, 2016
Risks and Uncertainties [Abstract]
Significant Tenant	Significant Tenant Five Star is our most significant tenant. Rental income from Five Star represented 19.1% of our total revenues for the three months ended September 30, 2016, and the properties Five Star leases from us represented 29.7% of our real estate investments, at cost, as of September 30, 2016. As of September 30, 2016, Five Star also managed 63 senior living communities for our account. See Note 10 for further information relating to our leases and management arrangements with Five Star.