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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 Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
General allowance for credit loss liability on unfunded | $ 3,900 | $ 4,000
General CECL allowance on unfunded commitments | $ 3,850 | $ 4,017
Germany |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage of Portfolio | 8.00% | 7.40%
Italy |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage of Portfolio | 2.30% | 4.90%
Spain |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage of Portfolio | 3.40% | 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 | 0.20% | 0.20%
Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage of Portfolio | 1.20% | 1.10%
Northeast |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Percentage of Portfolio | 0.10% | 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 | 1.70% | 1.10%
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 | 1.70% | 1.50%

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