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Investment Securities - Narrative (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Investments in an unrealized loss position
Amount of pretax loss if securities in an unrealized loss position are sold	$ 36,800,000
Allowance for credit losses, continuous unrealized loss position	0
Asset Pledged as Collateral | Public Funds, Repurchase Agreements, and Potential Borrowings
Investments in an unrealized loss position
Amortized cost	$ 236,300,000	$ 223,400,000

X

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Amount of unrealized loss on investments in available-for-sale and held-to-maturity securities.

+ References

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Amount excluding accrued interest, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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