Major Operators (Details)	9 Months Ended
	Sep. 30, 2016 property item
Major Operators
Number of major operators | item	4
Prestige Healthcare | SNF
Major Operators
Number of properties | property	20
Number of beds/units | item	2,822
Prestige Healthcare | ALF
Major Operators
Number of beds/units | item	93
Prestige Healthcare | ROC
Major Operators
Number of properties | property	2
Senior Lifestyle Corporation | ALF
Major Operators
Number of properties | property	27
Number of beds/units | item	1,632
Brookdale Senior Living | ALF
Major Operators
Number of properties | property	37
Number of beds/units | item	1,704
Senior Care Centers | SNF
Major Operators
Number of properties | property	11
Number of beds/units | item	1,444
Operator Concentration Risk | SNF
Major Operators
Number of properties | property	31
Number of beds/units | item	4,266
Operator Concentration Risk | ALF
Major Operators
Number of properties | property	64
Number of beds/units | item	3,429
Operator Concentration Risk | ROC
Major Operators
Number of properties | property	2
Rental Revenue and Interest Income from Mortgage Loans | Operator Concentration Risk
Major Operators
Concentration risk (as a percent)	53.50%
Rental Revenue and Interest Income from Mortgage Loans | Operator Concentration Risk | Prestige Healthcare
Major Operators
Concentration risk (as a percent)	21.20%
Rental Revenue and Interest Income from Mortgage Loans | Operator Concentration Risk | Senior Lifestyle Corporation
Major Operators
Concentration risk (as a percent)	12.40%
Rental Revenue and Interest Income from Mortgage Loans | Operator Concentration Risk | Brookdale Senior Living
Major Operators
Concentration risk (as a percent)	10.00%
Rental Revenue and Interest Income from Mortgage Loans | Operator Concentration Risk | Senior Care Centers
Major Operators
Concentration risk (as a percent)	9.90%
Total Assets | Operator Concentration Risk
Major Operators
Concentration risk (as a percent)	43.20%
Total Assets | Credit Concentration Risk | Prestige Healthcare
Major Operators
Concentration risk (as a percent)	16.10%
Total Assets | Credit Concentration Risk | Senior Lifestyle Corporation
Major Operators
Concentration risk (as a percent)	12.90%
Total Assets | Credit Concentration Risk | Brookdale Senior Living
Major Operators
Concentration risk (as a percent)	5.60%
Total Assets | Credit Concentration Risk | Senior Care Centers
Major Operators
Concentration risk (as a percent)	8.60%