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REAL ESTATE INVESTMENTS - Held for Use Impairment and Sale (Narrative) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($) property | Dec. 31, 2023 USD ($) property | Dec. 31, 2022 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Number of real estate properties | property | 64 |  |
Impairment long lived asset held for use statement of income or comprehensive income extensible enumeration not disclosed flag |  | impairment losses |
Assets held for sale | $ 0.0 | $ 0.0 |
Other |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Impairment of properties held for use | $ 23.5 | $ 103.2 | $ 4.7
Number of real estate properties | property | 1 | 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 Segment | 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 |

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