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Commercial Mortgage Loans, Subordinate Loans and Other Lending Assets, Net - Schedule of Mortgage Loans by Property Type and Geographic Distribution (Parenthetical) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
General allowance for credit loss liability on unfunded | $ 5.9 | $ 4.0 | $ 4.3
Germany |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 8.40% | 7.40% |
Italy |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 2.40% | 4.90% |
Spain |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 3.50% | 4.20% |
Sweden |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 3.10% | 2.90% |
Ireland |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio |  | 0.50% |
Netherlands |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 0.30% | 0.20% |
Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 1.30% | 1.10% |
Northeast |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 0.60% | 5.00% |
Southwest |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 1.50% | 1.70% |
Mid-Atlantic |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 1.40% | 1.10% |
Residential-for-Sale |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 5.50% | 8.10% |
Senior Care Facilities |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 4.70% | 1.90% |
Multifamily |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 4.70% | 2.10% |
Student Housing |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 4.60% | 2.70% |
Vacation Rentals |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 2.30% | 2.00% |
Pubs |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 2.90% |  |
Parking Garage |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio |  | 2.30% |
Caravan Park |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 2.70% | 2.40% |
Urban Predevelopment |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 1.90% | 1.50% |

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