Annual report pursuant to Section 13 and 15(d)

DISCONTINUED OPERATIONS - Narrative (Details)

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DISCONTINUED OPERATIONS - Narrative (Details) - Suburban Office Portfolio
ft² in Thousands, $ in Millions
 12 Months Ended 36 Months Ended
Dec. 31, 2022
USD ($)
ft²
Dec. 31, 2021
USD ($)
property
Sep. 30, 2022
ft²
Dec. 19, 2019
ft²
Discontinued Operations, Held-for-sale        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Area of property (in square feet) | ft²     350 6,600
Number of buildings on properties sold | property   1    
Unrealized loss on real estate held for sale | $ $ 4.4      
Discontinued Operations, Disposed of by Sale        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Area of property (in square feet) | ft² 6,300      
Number of buildings on properties sold | property   37    
Sales proceeds | $   $ 1,000.0