CONCENTRATION OF CREDIT RISK - Triple-Net Leased Properties (Details) - Customer Concentration Risk	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenues | Brookdale Senior Living
Concentration Risk
Concentration percentage	3.50%	3.70%
Revenues | Ardent
Concentration Risk
Concentration percentage	3.10%	3.20%
Revenues | Kindred
Concentration Risk
Concentration percentage	3.00%	3.30%
NOI | Brookdale Senior Living
Concentration Risk
Concentration percentage	8.00%	7.80%
NOI | Ardent
Concentration Risk
Concentration percentage	7.10%	6.80%
NOI | Kindred
Concentration Risk
Concentration percentage	7.00%	7.00%