CONCENTRATION OF CREDIT RISK - Triple-Net Leased Properties (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025 USD ($) property	Jun. 30, 2024 USD ($) property	Jun. 30, 2025 USD ($) property	Jun. 30, 2024 USD ($) property
Concentration Risk
Number of real estate properties	1,357		1,357
Other Noncash Income (Expense) | $			$ (2,752)	$ 129
Ardent | LTAC | NNN
Concentration Risk
Number of real estate properties	11		11
Ardent | LTAC | OM&R
Concentration Risk
Number of real estate properties	19		19
Brookdale (1)(2) | SHOP
Concentration Risk
Number of real estate properties	9	10	9	10
Brookdale Senior Living
Concentration Risk
Other Noncash Income (Expense) | $	$ 6,600	$ 10,700	$ 13,200	$ 21,300
Customer Concentration Risk | Revenues | Brookdale (1)(2)
Concentration Risk
Concentration percentage	2.80%	3.10%	2.90%	3.10%
Customer Concentration Risk | Revenues | Ardent
Concentration Risk
Concentration percentage	2.70%	3.10%	2.80%	3.10%
Customer Concentration Risk | Revenues | Kindred
Concentration Risk
Concentration percentage	2.50%	2.80%	2.60%	2.80%
Customer Concentration Risk | NOI | Brookdale (1)(2)
Concentration Risk
Concentration percentage	6.80%	7.20%	6.90%	7.30%
Customer Concentration Risk | NOI | Ardent
Concentration Risk
Concentration percentage	6.50%	7.30%	6.60%	7.30%
Customer Concentration Risk | NOI | Kindred
Concentration Risk
Concentration percentage	5.90%	6.60%	6.10%	6.60%