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Securities - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Additional disclosures
Carrying amount of the securities pledged to collateralize repurchase agreements	$ 6,798,876,000	$ 7,463,871,000
Other investment securities	0
Asset Pledged as Collateral
Additional disclosures
Carrying amount of the securities pledged to collateralize repurchase agreements	$ 370,400,000	$ 410,400,000
Financing Receivable, Pledging Purpose [Extensible Enumeration]	Federal Funds Purchased	Federal Funds Purchased
Investment securities market value	$ 2,400,000,000	$ 3,000,000,000
Carrying value of public fund deposits	2,600,000,000	3,200,000,000
Asset Pledged as Collateral | Public Funds Deposits
Additional disclosures
Carrying value of public fund deposits	2,300,000,000	2,400,000,000
Asset Pledged as Collateral | FHLB Advances
Additional disclosures
Carrying value of public fund deposits	193,700,000	729,400,000
Asset Pledged as Collateral | Interest rate swap
Additional disclosures
Carrying value of public fund deposits	$ 101,500,000	$ 115,000,000

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