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Investment Securities - Schedule of Income Earned on Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Non-taxable:
Total	$ 37,464	$ 53,220	$ 131,619	$ 166,271
Held-to-maturity
Taxable:
Taxable	2,370	10,533	22,993	32,378
Non-taxable:
Non-taxable	1,945	10,101	22,048	30,298
Available-for-sale
Taxable:
Taxable	26,813	26,940	69,007	86,576
Non-taxable:
Non-taxable	$ 6,336	$ 5,646	$ 17,571	$ 17,019

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Interest income, securities, operating, by non-0taxable status [abstract]

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- Definition

Amount of operating interest income, including amortization and accretion of premiums and discounts, on securities exempt from state, federal and other income tax.

+ References

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-Section 1402
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-Publisher SEC

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Amount of operating interest income, including amortization and accretion of premiums and discounts, on securities subject to state, federal and other income tax.

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Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
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