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Securities - Additional Information (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Additional disclosures |  |
Carrying amount of the securities pledged to collateralize repurchase agreements | $ 7,232,274,000 | $ 7,463,871,000
Other investment securities | 0 |
Asset Pledged as Collateral [Member] |  |
Additional disclosures |  |
Investment securities market value | 2,200,000,000 | 3,000,000,000.0
Carrying value of public fund deposits | 2,400,000,000 | 3,200,000,000
Asset Pledged as Collateral [Member] | Public Funds Deposits |  |
Additional disclosures |  |
Carrying value of public fund deposits | 2,200,000,000 | 2,400,000,000
Asset Pledged as Collateral [Member] | FHLB Advances |  |
Additional disclosures |  |
Carrying value of public fund deposits | 145,400,000 | 729,400,000
Asset Pledged as Collateral [Member] | Interest rate swap |  |
Additional disclosures |  |
Carrying value of public fund deposits | $ 111,200,000 | $ 115,000,000.0

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