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Participations Sold - Additional Information (Details) - Dec. 31, 2020 - Mezzanine Loans - Office Building - London £ in Millions, $ in Millions | USD ($) | GBP (£)
--- | --- | ---
Participating Mortgage Loans [Line Items] |  |
Debt instrument, face amount | $ 8.9 | £ 6.7
Remaining unfunded commitment | $ 25.3 | £ 19.1

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