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Commitments and Contingent Liabilities - Commitments to Extend Credit, Guarantees and Various Letters of Credit Outstanding (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Lines of credit	$ 4,739,420	$ 3,960,185
Loans approved but not closed	716,161	365,529
Overdraft limits	533,204	387,591
Letters of credit	54,775	47,879
Contingent obligations and other guarantees	$ 16,558	$ 16,574

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- References

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Balance Type:	credit
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- Definition

Contingent obligations to purchase loans funded by other entities.

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No definition available.

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- Definition

Unused portions of various lines of credit products.

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No definition available.

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Balance Type:	credit
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- Definition

Credit offerings by the bank to customer in which the customer has either not completed the closing or accepted the offer.

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No definition available.

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- Definition

Unused portion of available funds under overdraft programs on deposit programs.

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No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant