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Borrowings and Financing Activities - Schedule of Debt (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Instrument [Line Items] |  |
Total secured borrowings | $ 484,665 | $ 119,476
FHLB, floating SOFR advances | $ 13,000 | $ 13,000
FHLB, weighted average interest rate | 5.542% | 5.602%
Senior notes |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 1,513,782 | $ 1,417,781
Senior notes | Senior Notes due 2024 |  |
Debt Instrument [Line Items] |  |
Interest rate on senior notes | 4.50% |
Long-term debt | $ 449,675 | 449,037
Senior notes | Senior Notes due 2025 |  |
Debt Instrument [Line Items] |  |
Interest rate on senior notes | 6.625% |
Long-term debt | $ 0 | 522,343
Senior notes | Senior Notes due 2027 |  |
Debt Instrument [Line Items] |  |
Interest rate on senior notes | 4.875% |
Long-term debt | $ 446,924 | 446,401
Senior notes | Senior Notes due 2029 |  |
Debt Instrument [Line Items] |  |
Interest rate on senior notes | 6.20% |
Long-term debt | $ 617,183 | 0
FHLB advances |  |
Debt Instrument [Line Items] |  |
FHLB advances due 2024, average interest rate | 5.22% |
FHLB advances due 2025, average interest rate | 2.34% |
FHLB advances due 2026, average interest rate | 4.469% |
FHLB advances due 2027, average interest rate | 2.562% |
2024 | $ 40,125 | 72,871
2025 | 12,684 | 12,684
2026 | 1,835 | 1,835
2027 | 7,887 | 7,887
Total FHLB advances | 62,531 | 95,277
Mortgage loan financing facilities |  |
Debt Instrument [Line Items] |  |
Long-term debt | $ 422,134 | $ 24,199
Mortgage financing facilities, average interest rate | 7.073% |

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