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v3.25.4

Borrowings - Narrative (Details) - USD ($) $ in Thousands |  |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 11, 2025 | Dec. 30, 2024 | Oct. 30, 2020 | Mar. 25, 2019 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 16, 2019 | Sep. 17, 2003
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Market value pledged to repurchase agreements |  |  |  |  | $ 625,300 | $ 358,400 |  |  |
Repaid outstanding balance |  |  |  |  | 499,000 | 132,550 | $ 16,752 |  |
Total senior and subordinated debt |  |  |  |  | 744,718 | 899,071 |  |  |
Gains (losses) on debt extinguishment |  |  |  |  | 9,767 | $ 0 | $ 698 |  |
Senior Notes Due 2029 | Senior Notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Notes and subordinated debt |  |  |  | $ 300,000 |  |  |  |  |
Debt instrument, stated interest rate, percentage |  |  |  | 4.10% |  |  |  |  |
Senior Notes Due 2029 | Senior Notes | US Treasury (UST) Interest Rate |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread |  |  |  | 0.25% |  |  |  |  |
2029 subordinated notes | Sterling |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  |  |  |  |  |  | $ 274,000 |
Fixed-to-floating rate |  |  |  |  |  |  |  | 4.00% |
Interest rate on notes |  |  |  |  |  | 6.84% |  |  |
2029 subordinated notes | Subordinated Debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Repaid outstanding balance |  |  |  |  | 274,000 |  |  |  |
Total senior and subordinated debt |  |  |  |  | 0 | $ 274,000 |  |  |
Gains (losses) on debt extinguishment |  |  |  |  | 3,600 |  |  |  |
2029 subordinated notes | Subordinated Debt | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread |  | 2.53% |  |  |  |  |  |  |
2030 subordinated notes | Sterling |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  | $ 225,000 |  |  |  |  |  |
Fixed-to-floating rate |  |  | 3.875% |  |  |  |  |  |
2030 subordinated notes | Subordinated Debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Repaid outstanding balance |  |  |  |  | 225,000 |  |  |  |
Total senior and subordinated debt |  |  |  |  | 0 | 225,000 |  |  |
Gains (losses) on debt extinguishment |  |  |  |  | 6,200 |  |  |  |
2030 subordinated notes | Subordinated Debt | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread |  |  | 3.69% |  |  |  |  |  |
2035 subordinated notes | Subordinated Debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Notes and subordinated debt | $ 350,000 |  |  |  |  |  |  |  |
Debt instrument, stated interest rate, percentage | 5.784% |  |  |  |  |  |  |  |
Total senior and subordinated debt |  |  |  |  | $ 350,000 | $ 0 |  |  |
Fixed-Rate Subordinated Notes Due 2035 | Subordinated Debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread | 2.125% |  |  |  |  |  |  |  |
Maturity | 5 years |  |  |  |  |  |  |  |
Redemption price percentage | 100.00% |  |  |  |  |  |  |  |
2033 Junior Subordinated Notes | 2033 junior subordinated notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Notes and subordinated debt |  |  |  |  |  |  |  |  | $ 77,300
2033 Junior Subordinated Notes | 2033 junior subordinated notes | Secured Overnight Financing Rate (SOFR) |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  |  |  | 6.92% | 7.56% |  |  |
Interest rate spread of LIBOR plus (as a percent) |  |  |  |  |  |  |  |  | 2.95%

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