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Business Purpose Loans - Schedule of Geographic Concentration of Business Purpose Loans (Details) - Geographic Concentration Risk - Loan Benchmark | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
BPL bridge loans held-for-investment |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 100.00% | 100.00%
BPL bridge loans held-for-investment | Florida |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 10.00% | 6.00%
BPL bridge loans held-for-investment | California |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 5.00% | 2.00%
BPL bridge loans held-for-investment | Texas |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 13.00% | 13.00%
BPL bridge loans held-for-investment | Georgia |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 18.00% | 21.00%
BPL bridge loans held-for-investment | New Jersey |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 6.00% | 7.00%
BPL bridge loans held-for-investment | Tennessee |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 3.00% | 6.00%
BPL bridge loans held-for-investment | Alabama |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 6.00% | 6.00%
BPL bridge loans held-for-investment | Connecticut |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 2.00% | 4.00%
BPL bridge loans held-for-investment | New York |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 2.00% | 2.00%
BPL bridge loans held-for-investment | Illinois |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 13.00% | 8.00%
BPL bridge loans held-for-investment | Other states (none greater than 5%) |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 22.00% | 25.00%
Single-family rental loans, held-for-sale at fair value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 100.00% | 100.00%
Single-family rental loans, held-for-sale at fair value | Florida |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 7.00% | 5.00%
Single-family rental loans, held-for-sale at fair value | California |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 8.00% | 3.00%
Single-family rental loans, held-for-sale at fair value | Texas |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 22.00% | 1.00%
Single-family rental loans, held-for-sale at fair value | Georgia |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 13.00% | 14.00%
Single-family rental loans, held-for-sale at fair value | New Jersey |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 4.00% | 6.00%
Single-family rental loans, held-for-sale at fair value | Tennessee |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 7.00% | 2.00%
Single-family rental loans, held-for-sale at fair value | Alabama |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 3.00% | 33.00%
Single-family rental loans, held-for-sale at fair value | Connecticut |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 2.00% | 1.00%
Single-family rental loans, held-for-sale at fair value | New York |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 3.00% | 3.00%
Single-family rental loans, held-for-sale at fair value | Illinois |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 6.00% | 3.00%
Single-family rental loans, held-for-sale at fair value | Other states (none greater than 5%) |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 25.00% | 29.00%
HEI at Redwood | Single family rental loans held for investment at fair value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 100.00% | 100.00%
HEI at Redwood | Single family rental loans held for investment at fair value | Florida |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 10.00% | 4.00%
HEI at Redwood | Single family rental loans held for investment at fair value | California |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 8.00% | 34.00%
HEI at Redwood | Single family rental loans held for investment at fair value | Texas |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 8.00% | 3.00%
HEI at Redwood | Single family rental loans held for investment at fair value | Georgia |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 5.00% | 2.00%
HEI at Redwood | Single family rental loans held for investment at fair value | New Jersey |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 4.00% | 2.00%
HEI at Redwood | Single family rental loans held for investment at fair value | Tennessee |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 2.00% | 1.00%
HEI at Redwood | Single family rental loans held for investment at fair value | Alabama |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 1.00% | 2.00%
HEI at Redwood | Single family rental loans held for investment at fair value | Connecticut |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 0.00% | 10.00%
HEI at Redwood | Single family rental loans held for investment at fair value | New York |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 0.00% | 5.00%
HEI at Redwood | Single family rental loans held for investment at fair value | Illinois |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 0.00% | 6.00%
HEI at Redwood | Single family rental loans held for investment at fair value | Other states (none greater than 5%) |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 62.00% | 31.00%
Net investments in consolidated CAFL Term entities | Single family rental loans held for investment at fair value |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 100.00% | 100.00%
Net investments in consolidated CAFL Term entities | Single family rental loans held for investment at fair value | Florida |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 7.00% | 7.00%
Net investments in consolidated CAFL Term entities | Single family rental loans held for investment at fair value | California |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 4.00% | 4.00%
Net investments in consolidated CAFL Term entities | Single family rental loans held for investment at fair value | Texas |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 16.00% | 16.00%
Net investments in consolidated CAFL Term entities | Single family rental loans held for investment at fair value | Georgia |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 5.00% | 5.00%
Net investments in consolidated CAFL Term entities | Single family rental loans held for investment at fair value | New Jersey |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 7.00% | 8.00%
Net investments in consolidated CAFL Term entities | Single family rental loans held for investment at fair value | Tennessee |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 2.00% | 2.00%
Net investments in consolidated CAFL Term entities | Single family rental loans held for investment at fair value | Alabama |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 3.00% | 3.00%
Net investments in consolidated CAFL Term entities | Single family rental loans held for investment at fair value | Connecticut |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 8.00% | 8.00%
Net investments in consolidated CAFL Term entities | Single family rental loans held for investment at fair value | New York |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 7.00% | 5.00%
Net investments in consolidated CAFL Term entities | Single family rental loans held for investment at fair value | Illinois |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 5.00% | 5.00%
Net investments in consolidated CAFL Term entities | Single family rental loans held for investment at fair value | Other states (none greater than 5%) |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Concentration risk percentage | 36.00% | 37.00%

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