INVESTMENT IN REAL ESTATE PROPERTIES - Net Investment in Sales-Type Lease Narrative (Details) - Skilled nursing transitional care facility $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) property	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) property	Jun. 30, 2021 USD ($)
Real Estate Properties [Line Items]
Net investment in sales type lease	$ 25,400		$ 25,400
Properties in sales-type | property	1		1
Total rental payments	$ 1,900		$ 1,900
Estimated purchase price	25,600		25,600
Unearned lease income			2,000
Allowance for credit losses related to sales-type lease	100		100
Lease income	600	$ 600	1,200	$ 1,200
(Reduction) increase in allowance for credit losses related to sales-type lease	(31)	$ (21)	(100)	100
Future minimum lease payments contractually due under the direct financing lease for the remainder of this year	1,200		1,200
Future minimum lease payments contractually due under the direct financing lease due for next year	$ 800		$ 800
Sales-type lease
Real Estate Properties [Line Items]
Gain on sale of real estate prior to sale for lease modification and assessment				$ 1,000