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Affiliates - Schedule of Net Income, Assets and Liabilities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Net income/(loss) at the Company's share | $ (624) | $ (628) | $ (1,077) | $ (991) |
Assets at Company's share | 858,151 |  | 858,151 |  | $ 1,336,291
Liabilities at Company's share | 611,058 |  | 611,058 |  | 1,025,396
AS Ajax E LLC |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Assets at Company's share | 0 |  | 0 |  | 420
Liabilities at Company's share | 0 |  | 0 |  | 6
Great Ajax FS LLC |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Assets at Company's share | 0 |  | 0 |  | 6,854
Liabilities at Company's share | 0 |  | 0 |  | 5,748
Loan pool LLCs |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Assets at Company's share | 0 |  | 0 |  | 480
Liabilities at Company's share | 0 |  | 0 |  | 93
Gaea Real Estate Corp. |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Assets at Company's share | 0 |  | 0 |  | 37,272
Liabilities at Company's share | 0 |  | 0 |  | 16,346
Thetis Asset Management LLC |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Assets at Company's share | 531 |  | 531 |  | 919
Liabilities at Company's share | 17 |  | 17 |  | $ 258
AS Ajax E LLC |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Net income/(loss) at 100% | 0 | 52 | 81 | 174 |
Net income/(loss) at the Company's share | $ 0 | 9 | $ 13 | 29 |
Ownership percentage (in percent) | 0.00% |  | 0.00% |  | 16.50%
AS Ajax E LLC | Assets |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Assets and liabilities at 100% | $ 0 |  | $ 0 |  | $ 2,553
AS Ajax E LLC | Liabilities |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Assets and liabilities at 100% | 0 |  | 0 |  | $ 39
Great Ajax FS LLC |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Net income/(loss) at 100% | 0 | (92) | (269) | (1,066) |
Net income/(loss) at the Company's share | $ 0 | (9) | $ (26) | (96) |
Ownership percentage (in percent) | 0.00% |  | 0.00% |  | 9.72%
Great Ajax FS LLC | Assets |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Assets and liabilities at 100% | $ 0 |  | $ 0 |  | $ 71,477
Great Ajax FS LLC | Liabilities |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Assets and liabilities at 100% | 0 |  | 0 |  | $ 59,949
Loan pool LLCs |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Net income/(loss) at 100% | 0 | (16) | (34) | (56) |
Net income/(loss) at the Company's share | $ 0 | (6) | $ (14) | (22) |
Ownership percentage (in percent) | 0.00% |  | 0.00% |  | 40.00%
Loan pool LLCs | Assets |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Assets and liabilities at 100% | $ 0 |  | $ 0 |  | $ 1,200
Loan pool LLCs | Liabilities |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Assets and liabilities at 100% | 0 |  | 0 |  | $ 232
Gaea Real Estate Corp. |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Net income/(loss) at 100% | 0 | (4,584) | (594) | (6,916) |
Net income/(loss) at the Company's share | $ 0 | (1,007) | $ (108) | (1,520) |
Ownership percentage (in percent) | 22.20% |  | 22.20% |  | 22.20%
Gaea Real Estate Corp. | Assets |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Assets and liabilities at 100% | $ 0 |  | $ 0 |  | $ 167,591
Gaea Real Estate Corp. | Liabilities |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Assets and liabilities at 100% | 0 |  | 0 |  | $ 73,499
Thetis Asset Management LLC |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Net income/(loss) at 100% | (950) | 1,713 | 10,906 | 1,577 |
Net income/(loss) at the Company's share | $ (188) | $ 339 | $ 2,160 | $ 312 |
Ownership percentage (in percent) | 19.80% |  | 19.80% |  | 19.80%
Thetis Asset Management LLC | Assets |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Assets and liabilities at 100% | $ 2,682 |  | $ 2,682 |  | $ 4,643
Thetis Asset Management LLC | Liabilities |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Assets and liabilities at 100% | $ 84 |  | $ 84 |  | $ 1,305
Unconsolidated Affiliates |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
Ownership percentage (in percent) | 100.00% | 100.00% | 100.00% | 100.00% | 100.00%

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