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v3.25.1

Securities Securities - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2022 | Mar. 31, 2020 | Sep. 30, 2018 | Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Available-for-sale securities transferred to Held-to-Maturity |  |  | $ 1,100,000 | $ 873,600 | $ 179,800 |
Unrealized after tax gain (loss) on available for sale securities transferred to the held to maturity portfolio |  |  | $ 1,500 | $ 69,000 | $ (2,200) |
Secured borrowing under agreement to repurchase | $ 264,000 |  |  |  |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | 222,461 |  |  |  |  | $ 221,614
Debt Securities, Available-for-sale, Unrealized Loss Position | 4,482,239 |  |  |  |  | $ 4,343,563
Sales | 188,486 | $ 0 |  |  |  |
Debt Securities, Available-for-Sale, Realized Gain | 42 |  |  |  |  |
Debt Securities, Available-for-sale, Realized Loss | 12,600 |  |  |  |  |
Debt Securities, Available-for-Sale, Allowance for Credit Loss | 0 |  |  |  |  |
Securities pledged as collateral |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Financial Instruments, Owned, at Fair Value | 3,500,000 |  |  |  |  |
Securities pledged as collateral |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Secured borrowing under agreement to repurchase | $ 264,000 |  |  |  |  |

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