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Securities - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Apr. 01, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Allowance for credit losses - held to maturity securities	$ 32		$ 32
The First
Debt Securities, Available-for-sale [Line Items]
Securities		$ 1,457,377
Secure government, public and trust deposits
Debt Securities, Available-for-sale [Line Items]
Available for sale securities pledged as collateral	1,210,564		818,344
Short-term borrowings
Debt Securities, Available-for-sale [Line Items]
Available for sale securities pledged as collateral	13,639		13,083
Derivative Instruments
Debt Securities, Available-for-sale [Line Items]
Available for sale securities pledged as collateral	$ 16,935		$ 12,443

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Amount of investment in debt and equity securities acquired in business combination and recognized at acquisition date, classified as current.

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