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REAL ESTATE INVESTMENTS - Held for Use Impairment and Sale (Narrative) (Details) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 USD ($) property | Dec. 31, 2022 USD ($) | Jan. 20, 2022 USD ($) | Dec. 31, 2021 USD ($) a parcel
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Impairment of properties held for use |  | $ 4.7 |  |
Number of real estate properties | property | 72 |  |  |
Impairment long lived asset held for use statement of income or comprehensive income extensible enumeration not disclosed flag | impairment losses |  |  |
Other |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Impairment of properties held for use | $ 103.2 |  |  |
Number of real estate properties | property | 3 |  |  |
Other | Discount Rates | Valuation Technique, Discounted Cash Flow |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Debt securities, trading, measurement input | 0.1000 |  |  |
Other | Measurement Input, Capitalization Rate | Valuation Technique, Discounted Cash Flow |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Debt securities, trading, measurement input | 0.0850 |  |  |
Pennsylvania Suburbs | Office Properties |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Provision for impairment on assets held for sale | $ 11.7 |  |  |
Held for Sale Properties Included in Continuing Operations | Other Land |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Assets held for sale, net |  |  |  | $ 0.6
Aggregate sales price |  |  | $ 1.6 |
Held for Sale Properties Included in Continuing Operations | Other Land | Other |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Number of land parcels | parcel |  |  |  | 2
Land area | a |  |  |  | 10.0

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