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Fair Value - Financial Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Financial assets: |  |  |  |
Loans and investments, net | $ 11,033,997 | $ 12,377,806 | $ 14,254,674 | $ 11,981,048
Loans held-for-sale, net | 438,233 | 552,325 |  |
Securities held-to-maturity, net | 157,154 | 155,279 |  |
Financial liabilities: |  |  |  |
Credit and repurchase facilities | 3,559,490 | 3,237,827 |  |
Securitized debt | 4,622,489 | 6,935,010 |  |
Senior unsecured notes | 1,236,147 | 1,333,968 |  |
Convertible senior unsecured notes | 285,853 | 283,118 |  |
Junior subordinated notes | 144,686 | 143,896 |  |
Level 1 |  |  |  |
Financial assets: |  |  |  |
Loans and investments, net | 0 |  |  |
Loans held-for-sale, net | 0 |  |  |
Capitalized mortgage servicing rights, net | 0 |  |  |
Securities held-to-maturity, net | 0 |  |  |
Financial liabilities: |  |  |  |
Credit and repurchase facilities | 0 |  |  |
Securitized debt | 0 |  |  |
Senior unsecured notes | 1,160,154 |  |  |
Convertible senior unsecured notes | 0 |  |  |
Junior subordinated notes | 0 |  |  |
Level 2 |  |  |  |
Financial assets: |  |  |  |
Loans and investments, net | 0 |  |  |
Loans held-for-sale, net | 444,201 |  |  |
Capitalized mortgage servicing rights, net | 0 |  |  |
Securities held-to-maturity, net | 0 |  |  |
Financial liabilities: |  |  |  |
Credit and repurchase facilities | 422,661 |  |  |
Securitized debt | 0 |  |  |
Senior unsecured notes | 0 |  |  |
Convertible senior unsecured notes | 287,500 |  |  |
Junior subordinated notes | 0 |  |  |
Level 3 |  |  |  |
Financial assets: |  |  |  |
Loans and investments, net | 11,122,205 |  |  |
Loans held-for-sale, net | 5,138 |  |  |
Capitalized mortgage servicing rights, net | 511,282 |  |  |
Securities held-to-maturity, net | 144,508 |  |  |
Financial liabilities: |  |  |  |
Credit and repurchase facilities | 3,169,459 |  |  |
Securitized debt | 4,616,409 |  |  |
Senior unsecured notes | 0 |  |  |
Convertible senior unsecured notes | 0 |  |  |
Junior subordinated notes | 109,099 |  |  |
Carrying Value |  |  |  |
Financial assets: |  |  |  |
Loans and investments, net | 11,033,997 | 12,377,806 |  |
Loans held-for-sale, net | 435,759 | 551,707 |  |
Capitalized mortgage servicing rights, net | 368,678 |  |  |
Securities held-to-maturity, net | 157,154 | 155,279 |  |
Financial liabilities: |  |  |  |
Credit and repurchase facilities | 3,559,490 | 3,237,827 |  |
Securitized debt | 4,622,489 | 6,935,010 |  |
Senior unsecured notes | 1,236,147 | 1,333,968 |  |
Convertible senior unsecured notes | 285,853 | 283,118 |  |
Junior subordinated notes | 144,686 | 143,896 |  |
Fair Value |  |  |  |
Financial assets: |  |  |  |
Loans and investments, net | 11,122,205 | 12,452,563 |  |
Loans held-for-sale, net | 449,339 | 566,451 |  |
Capitalized mortgage servicing rights, net | 511,282 |  |  |
Securities held-to-maturity, net | 144,508 | 129,390 |  |
Financial liabilities: |  |  |  |
Credit and repurchase facilities | 3,592,120 | 3,228,324 |  |
Securitized debt | 4,616,409 | 6,864,557 |  |
Senior unsecured notes | 1,160,154 | 1,214,331 |  |
Convertible senior unsecured notes | 287,500 | 301,156 |  |
Junior subordinated notes | $ 109,099 | $ 106,444 |  |

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