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DISPOSITIONS AND IMPAIRMENT CHARGES - Additional Information (Details)
$ in Thousands
12 Months Ended
Oct. 24, 2023
USD ($)
ft²
Dec. 31, 2023
USD ($)
ft²
lease
Dec. 31, 2022
USD ($)
ft²
Dec. 31, 2021
USD ($)
groundLease
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Impairment charges   $ 477 $ 0 $ 0
Number of properties subject to ground leases | lease   12    
Net proceeds from sales of operating properties   $ 137,687 $ 75,699 $ 26,556
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]       Gain on sales of operating properties, net
Disposal Group, Held-for-Sale, Not Discontinued Operations | Eastside        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Impairment charges   $ 500    
Square footage | ft²   43,640    
Real estate investment, fair value   $ 14,100    
Disposed of by sale        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Square footage | ft²   578,495 100,016  
Sales price   $ 142,050 $ 75,550  
Number of properties subject to ground leases | groundLease       17
Net proceeds from sales of operating properties       $ 42,000
Gain on disposal   $ 22,601 $ 27,069 $ 27,600
Disposed of by sale | Eastside        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Square footage | ft² 43,640      
Sales price $ 14,425      
Gain on disposal $ 0