IMPAIRMENT OF REAL ESTATE INVESTMENTS, ASSETS HELD FOR SALE, NET AND ASSET SALES - Schedule of Company's Assets Held for Sale Activity (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($) facility	Jun. 30, 2023 USD ($) facility
Increase Decrease in Assets Held for Sale [Roll Forward]
Beginning balance, at cost	$ 2,005,077
Ending balance, at cost	2,169,218
Disposal Group, Held-for-sale, Not Discontinued Operations
Increase Decrease in Assets Held for Sale [Roll Forward]
Beginning balance, at cost	15,011	$ 12,291
Additions to assets held for sale	43,305	47,047
Assets sold	(1,108)	(14,506)
Impairment of real estate held for sale	(28,455)	(23,278)
Ending balance, at cost	$ 28,753	$ 21,554
Number of facilities at beginning | facility	14	5
Number of facilities, Additions to assets held for sale | facility	9	14
Number of facilities, Assets sold | facility	(3)	(4)
Number of facilities, Impairment of real estate held for sale | facility	0	0
Number of facilities at end | facility	20	15