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Related party transactions - Management fee (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Related Party Transaction [Line Items] |  |  |
Management fee expense |  | $ 9,266 | $ 7,533
Affiliated Entity |  |  |
Related Party Transaction [Line Items] |  |  |
Management fee expense | [1] | $ 9,266 | 7,533
Affiliated Entity | Western Asset Mortgage Capital Corporation |  |  |
Related Party Transaction [Line Items] |  |  |
Management fee amount waived |  |  | $ 1,800
[1] | Refer to Note 10 for additional details on related party transactions.

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