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Investment Securities Narrative (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
May 31, 2024 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Schedule of Investments [Line Items] |  |  |  |  |  |
Debt Securities, Held-to-Maturity, Fair Value |  | $ 1,033,439 |  | $ 1,033,439 |  | $ 1,072,207
Proceeds from sales of AFS securities | $ 345,700 |  |  | 2,261,028 | $ 80,666 |
Debt securities, realized loss | $ 20,300 | 20,373 | $ 4 | 20,373 | $ 264 |
Collateral Pledged [Member] |  |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |  |
Securities pledged as collateral |  | $ 1,200,000 |  | $ 1,200,000 |  | $ 400,000

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