Major Operators (Details)	3 Months Ended
	Mar. 31, 2019 item property
Major Operators
Number of major operators	3
Prestige Healthcare | SNF
Major Operators
Number of beds | property	24
Number of beds/units	3,010
Prestige Healthcare | ALF
Major Operators
Number of beds/units	93
Senior Lifestyle Corporation | ALF
Major Operators
Number of beds | property	23
Number of beds/units	1,457
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	24
Number of beds/units	3,010
Operator Concentration Risk | ALF
Major Operators
Number of beds | property	60
Number of beds/units	3,252
Total Revenue | Operator Concentration Risk
Major Operators
Concentration risk (as a percent)	38.90%
Total Revenue | Operator Concentration Risk | Prestige Healthcare
Major Operators
Concentration risk (as a percent)	17.90%
Total Revenue | Operator Concentration Risk | Senior Lifestyle Corporation
Major Operators
Concentration risk (as a percent)	11.60%
Total Revenue | Operator Concentration Risk | Brookdale Senior Living
Major Operators
Concentration risk (as a percent)	9.40%
Total Assets | Operator Concentration Risk
Major Operators
Concentration risk (as a percent)	32.10%
Total Assets | Credit Concentration Risk | Prestige Healthcare
Major Operators
Concentration risk (as a percent)	17.00%
Total Assets | Credit Concentration Risk | Senior Lifestyle Corporation
Major Operators
Concentration risk (as a percent)	10.50%
Total Assets | Credit Concentration Risk | Brookdale Senior Living
Major Operators
Concentration risk (as a percent)	4.60%