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DESCRIPTION OF BUSINESS - Schedule of Reportable Business Segments and Non-Segment Assets (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($) property	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) property segment	Sep. 30, 2023 USD ($)
Real estate properties
NOI	$ 513,150	$ 489,129	$ 1,531,388	$ 1,436,066
Percentage of Total NOI			100.00%
Number of real estate properties \| property	1,319		1,319
Number of Reportable Segments \| segment			3
Operating Segments \| Senior housing operating portfolio (SHOP)
Real estate properties
Number of real estate properties \| property	591		591
Operating Segments \| Senior housing operating portfolio (SHOP) \| Net Operating Income Benchmark \| Customer Concentration Risk
Real estate properties
Concentration percentage			41.30%
Operating Segments \| OM&R
Real estate properties
Number of real estate properties \| property	426		426
Operating Segments \| OM&R \| Net Operating Income Benchmark \| Customer Concentration Risk
Real estate properties
Concentration percentage			28.50%
Operating Segments \| NNN
Real estate properties
Number of real estate properties \| property	302		302
Operating Segments \| NNN \| Net Operating Income Benchmark \| Customer Concentration Risk
Real estate properties
Concentration percentage			29.60%
Operating Segments \| Senior housing operating portfolio (SHOP)
Real estate properties
NOI	$ 213,982
Operating Segments \| OM&R
Real estate properties
NOI	144,096	148,073	$ 435,938	428,987
Operating Segments \| NNN
Real estate properties
NOI	150,970	155,965	453,028	452,726
Operating Segments \| SHOP
Real estate properties
NOI		180,702	631,706	525,977
Non-Segment
Real estate properties
NOI	$ 4,102	$ 4,389	$ 10,716	$ 28,376
Non-Segment \| Non-Segment
Real estate properties
Percentage of Total NOI			0.70%
Number of real estate properties \| property	0		0