CONCENTRATION OF CREDIT RISK - Triple-Net Leased Properties (Details) - Customer Concentration Risk	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Revenues | Brookdale Senior Living
Concentration Risk
Concentration percentage	3.60%	4.10%
Revenues | Ardent
Concentration Risk
Concentration percentage	3.20%	3.40%
Revenues | Kindred
Concentration Risk
Concentration percentage	3.30%	3.60%
NOI | Brookdale Senior Living
Concentration Risk
Concentration percentage	8.40%	8.80%
NOI | Ardent
Concentration Risk
Concentration percentage	7.30%	7.40%
NOI | Kindred
Concentration Risk
Concentration percentage	7.60%	7.80%