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IMPAIRMENT OF REAL ESTATE INVESTMENTS, ASSETS HELD FOR SALE, NET AND ASSET SALES - Schedule of Company's Dispositions (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2024
USD ($)
facility
Mar. 31, 2023
USD ($)
facility
Jan. 31, 2024
USD ($)
facility
Dec. 31, 2023
facility
Dec. 31, 2022
facility
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Net sales proceeds $ 46 $ 3,230      
Net gain (loss) on sale $ 11 $ (70)      
Disposed of by Sale          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Number of facilities | facility 2 1      
Net sales proceeds $ 1,046 $ 3,230      
Net carrying value 1,035 3,300      
Net gain (loss) on sale $ 11 $ (70)      
Disposed of by Sale | ALF          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Number of facilities | facility     1    
Disposal Group, Held-for-sale, Not Discontinued Operations          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Number of facilities | facility 13 6   14 5
Disposal Group, Held-for-sale, Not Discontinued Operations | ALF          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Principal amount     $ 1,000