IMPAIRMENT OF REAL ESTATE INVESTMENTS, ASSETS HELD FOR SALE, NET AND ASSET SALES - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($) facility	Jun. 30, 2022 USD ($) facility	Jun. 30, 2023 USD ($) facility	Jun. 30, 2022 USD ($) facility
Real Estate [Line Items]
Number of facilities	1		1
Minimum | Level 3 | Valuation, Market Approach
Real Estate [Line Items]
Prices per unit input | $	$ 18		$ 18
Maximum | Level 3 | Valuation, Market Approach
Real Estate [Line Items]
Prices per unit input | $	35		35
Weighted average | Level 3 | Valuation, Market Approach
Real Estate [Line Items]
Prices per unit input | $	$ 21		$ 21
Held for sale
Real Estate [Line Items]
Number of facilities	15		15
Impairment expense to reduce carrying value to fair value less costs to sell | $	$ 21,400	$ 1,700	$ 23,300	$ 61,400
Held for sale | Minimum
Real Estate [Line Items]
Number of facilities	12		12
Number of properties impaired		1		1
Held for sale | Maximum
Real Estate [Line Items]
Number of facilities	15		15
Number of properties impaired		21		21