DESCRIPTION OF BUSINESS - Schedule of Reportable Business Segments and Non-Segment Assets (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) property	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) property segment	Sep. 30, 2024 USD ($)
Real estate properties
NOI | $	$ 614,897	$ 513,150	$ 1,772,310	$ 1,531,388
Percentage of Total NOI			100.00%
Number of real estate properties	1,371		1,371
Number of Reportable Segments | segment			3
Operating Segments
Real estate properties
Number of real estate properties	1,371		1,371
Operating Segments | Senior housing operating portfolio (SHOP)
Real estate properties
Number of real estate properties	714		714
Operating Segments | OM&R
Real estate properties
Number of real estate properties	411		411
Operating Segments | NNN
Real estate properties
Number of real estate properties	246		246
Operating Segments | SHOP
Real estate properties
NOI | $	$ 302,296	213,982	$ 853,212	631,706
Percentage of Total NOI			48.10%
Operating Segments | OM&R
Real estate properties
NOI | $	147,745	144,096	$ 440,273	435,938
Percentage of Total NOI			24.80%
Operating Segments | NNN
Real estate properties
NOI | $	157,038	150,970	$ 458,360	453,028
Percentage of Total NOI			25.90%
Non-Segment
Real estate properties
NOI | $	$ 7,818	$ 4,102	$ 20,465	$ 10,716
Percentage of Total NOI			1.20%
Number of real estate properties	35		35