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Investment securities - Pledged Securities (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Collateral Pledged
Available-for-sale and Held-to-maturity securities
Carrying value of securities pledged	$ 437.7	$ 441.5
U.S. government-sponsored enterprises
Available-for-sale and Held-to-maturity securities
Maximum percentage of stockholders' equity exceeded for securities of any individual issuer	10.00%

X

- Definition

The maximum percentage of stockholders' equity exceeded for securities of any individual issuer.

+ References

No definition available.

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- Definition

Amount of restricted investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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