Fair Value - Carrying amounts and estimated fair value of financial instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Carrying amount and estimated fair value of financial instruments
Cash and due from banks	$ 96,887	$ 130,369
Federal funds sold		475
Securities available-for-sale	1,170,768	1,149,526
Restricted stock	18,553	18,536
Loans, net	4,327,017	3,949,043
Accrued interest receivable	27,881	27,762
Deposits	(4,838,894)	(4,554,207)
Short-term borrowings	(349,781)	(292,468)
Other borrowings	(208,756)	(188,208)
Accrued interest payable	(3,534)	(3,084)
Level 1
Carrying amount and estimated fair value of financial instruments
Cash and due from banks	32,253	38,587
Level 2
Carrying amount and estimated fair value of financial instruments
Cash and due from banks	64,634	91,782
Federal funds sold		475
Securities available-for-sale	1,168,126	1,146,676
Accrued interest receivable	6,926	6,482
Deposits	(4,838,894)	(4,554,207)
Short-term borrowings	(349,781)	(292,468)
Other borrowings	(208,756)	(188,208)
Accrued interest payable	(3,534)	(3,084)
Level 3
Carrying amount and estimated fair value of financial instruments
Securities available-for-sale	2,642	2,850
Loans, net	4,327,017	3,949,043
Accrued interest receivable	20,955	21,280
Carrying Value
Carrying amount and estimated fair value of financial instruments
Cash and due from banks	96,887	130,369
Federal funds sold		475
Securities available-for-sale	1,170,768	1,149,526
Restricted stock	18,553	18,536
Loans, net	4,371,583	4,007,308
Accrued interest receivable	27,881	27,762
Deposits	(4,842,386)	(4,551,111)
Short-term borrowings	(349,781)	(292,468)
Other borrowings	(208,756)	(188,208)
Accrued interest payable	$ (3,534)	$ (3,084)

Fair value portion of other borrowings at at the end of the reporting period.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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

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Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

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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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Fair value portion of federal funds sold and securities borrowed or purchased under agreements to resell.

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Amount of interest payable on debt, including, but not limited to, trade payables.

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Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet.

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of short-term debt existing as of the balance sheet date.

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