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Borrowings - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Debt Instrument
FHLB advances maximum amount available	$ 4,800,000	$ 4,700,000
Federal Home Loan Bank Advances And Letters Of Credit Amount Used	600,000	500,000
Assets sold under agreements to repurchase	56,853	54,833
Other short-term borrowings	400,000	225,000
Advances with FRB
Debt Instrument
Line Of Credit Facility Current Borrowing Capacity	11,200,000	7,000,000
Federal Home Loan Bank
Debt Instrument
Federal Home Loan Bank Advances And Letters Of Credit Amount Used		300,000
Other short-term borrowings	$ 400,000	$ 225,000

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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