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Related party transactions - Schedule of investments in debt and equity of affiliates (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Related Party Transaction [Line Items] |  |
Equity in earnings/(loss) from affiliates | $ 2,821 | $ 3,141
ARC Home |  |
Related Party Transaction [Line Items] |  |
Loan securitization, ownership interest | 66.00% |
Arc Home |  |
Related Party Transaction [Line Items] |  |
Equity in earnings/(loss) from affiliates | $ 4,125 | 1,141
Residential investments - Fair value / Net income /(loss) |  |
Related Party Transaction [Line Items] |  |
Equity in earnings/(loss) from affiliates | (1,304) | 2,000
Non-QM Loans |  |
Related Party Transaction [Line Items] |  |
Equity in earnings/(loss) from affiliates | (1,167) | 1,289
Re/Non-Performing Securities |  |
Related Party Transaction [Line Items] |  |
Equity in earnings/(loss) from affiliates | $ (137) | $ 711
Related Party | ARC Home |  |
Related Party Transaction [Line Items] |  |
Loan securitization, ownership interest | 66.00% | 44.60%
Assets | Related Party |  |
Related Party Transaction [Line Items] |  |
Investments, assets | $ 61,345 | $ 47,454
Cash and Other assets/(liabilities) | 1,291 | 910
Assets | Related Party | Arc Home |  |
Related Party Transaction [Line Items] |  |
Investments, assets | 50,016 | 30,778
Assets | Related Party | Residential investments - Fair value / Net income /(loss) |  |
Related Party Transaction [Line Items] |  |
Real Estate Securities, Excess MSRs and Loans, at fair value | 10,038 | 15,766
Assets | Related Party | Non-QM Loans |  |
Related Party Transaction [Line Items] |  |
Real Estate Securities, Excess MSRs and Loans, at fair value | 9,439 | 13,304
Assets | Related Party | Re/Non-Performing Securities |  |
Related Party Transaction [Line Items] |  |
Real Estate Securities, Excess MSRs and Loans, at fair value | 599 | 2,462
Liabilities | Related Party |  |
Related Party Transaction [Line Items] |  |
Investments, liabilities | (12) | (613)
Cash and Other assets/(liabilities) | (12) | (25)
Liabilities | Related Party | Arc Home |  |
Related Party Transaction [Line Items] |  |
Investments, liabilities | 0 | 0
Liabilities | Related Party | Residential investments - Fair value / Net income /(loss) |  |
Related Party Transaction [Line Items] |  |
Real Estate Securities, Excess MSRs and Loans, at fair value | 0 | (588)
Liabilities | Related Party | Non-QM Loans |  |
Related Party Transaction [Line Items] |  |
Real Estate Securities, Excess MSRs and Loans, at fair value | 0 | 0
Liabilities | Related Party | Re/Non-Performing Securities |  |
Related Party Transaction [Line Items] |  |
Real Estate Securities, Excess MSRs and Loans, at fair value | 0 | (588)
Equity | Related Party |  |
Related Party Transaction [Line Items] |  |
Investments, equity | 61,333 | 46,841
Cash and Other assets/(liabilities) | 1,279 | 885
Equity | Related Party | Arc Home |  |
Related Party Transaction [Line Items] |  |
Investments, equity | 50,016 | 30,778
Equity | Related Party | Residential investments - Fair value / Net income /(loss) |  |
Related Party Transaction [Line Items] |  |
Real Estate Securities, Excess MSRs and Loans, at fair value | 10,038 | 15,178
Equity | Related Party | Non-QM Loans |  |
Related Party Transaction [Line Items] |  |
Real Estate Securities, Excess MSRs and Loans, at fair value | 9,439 | 13,304
Equity | Related Party | Re/Non-Performing Securities |  |
Related Party Transaction [Line Items] |  |
Real Estate Securities, Excess MSRs and Loans, at fair value | $ 599 | $ 1,874

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