Major Operators (Details)	3 Months Ended
	Mar. 31, 2017 property item
Major Operators
Number of major operators	3
Prestige Healthcare | SNF
Major Operators
Number of beds | property	22
Number of beds/units	2,862
Prestige Healthcare | ALF
Major Operators
Number of beds/units	93
Senior Lifestyle Corporation | ALF
Major Operators
Number of beds | property	27
Number of beds/units	1,632
Brookdale Senior Living | ALF
Major Operators
Number of beds | property	37
Number of beds/units	1,702
Operator Concentration Risk | SNF
Major Operators
Number of beds | property	22
Number of beds/units	2,862
Operator Concentration Risk | ALF
Major Operators
Number of beds | property	64
Number of beds/units	3,427
Total Revenue | Operator Concentration Risk
Major Operators
Concentration risk (as a percent)	37.90%
Total Revenue | Operator Concentration Risk | Prestige Healthcare
Major Operators
Concentration risk (as a percent)	16.30%
Total Revenue | Operator Concentration Risk | Senior Lifestyle Corporation
Major Operators
Concentration risk (as a percent)	12.00%
Total Revenue | Operator Concentration Risk | Brookdale Senior Living
Major Operators
Concentration risk (as a percent)	9.60%
Total Assets | Operator Concentration Risk
Major Operators
Concentration risk (as a percent)	34.20%
Total Assets | Credit Concentration Risk | Prestige Healthcare
Major Operators
Concentration risk (as a percent)	16.20%
Total Assets | Credit Concentration Risk | Senior Lifestyle Corporation
Major Operators
Concentration risk (as a percent)	12.60%
Total Assets | Credit Concentration Risk | Brookdale Senior Living
Major Operators
Concentration risk (as a percent)	5.40%