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Short-Term Borrowings - Components and Selected Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Sep. 13, 2024
Short-term borrowings
Short-term borrowings	$ 250,000	$ 500,000
Short-term FHLB fixed-rate advances
Short-term borrowings
Borrowing capacity		2,500,000
Federal Reserve Bank Advances
Short-term borrowings
Borrowing capacity	3,000,000	3,300,000
Federal funds purchased:
Short-term borrowings
Weighted-average interest rate (as a percent)			4.35%
Highest month-end balance		150,000	$ 75,000
Average outstanding balance		$ 17,247	$ 11,521
Weighted-average interest rate paid (as a percent)		4.45%	4.08%
Short-term FHLB repo advance:
Short-term borrowings
Highest month-end balance		$ 400,000
Average outstanding balance		$ 116,918
Weighted-average interest rate paid (as a percent)		5.25%
Short-term FHLB fixed-rate advances
Short-term borrowings
Short-term borrowings	$ 250,000	$ 500,000
Weighted-average interest rate (as a percent)	4.16%	4.71%		4.71%
Borrowing capacity	$ 2,800,000
Highest month-end balance	500,000	$ 500,000
Average outstanding balance	$ 424,863	$ 144,932
Weighted-average interest rate paid (as a percent)	4.70%	4.75%

X

- Definition

The average effective interest rate during the reporting period.

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Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Weighted average interest rate of short-term debt outstanding calculated at point in time.

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For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period.

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For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, maximum month-end borrowings during the period.

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