Fair Value Measurements - Summary of Estimated Fair Value of Financial Instruments that are not Required to be Measured or Reported at Fair Value (Detail) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financial assets:
Cash and cash equivalents (Level 1)	$ 191,232	$ 80,190
Securities held to maturity (Level 2)	34,626	36,735
Financial liabilities:
Long-term borrowings (Level 3)	102,415	72,034
Short-term borrowings (Level 1)	0	10,000
Note payable (Level 3)	572	590
Subordinated Notes (Level 3)	61,843	61,444
Carrying Amount [Member] \| Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and cash equivalents (Level 1)	191,232	80,190
Accrued interest receivable (Level 1)	9,588	9,831
Restricted investments in bank stock (Level 1)	4,904	3,965
Cash surrender value of life insurance (Level 1)	51,646	48,847
Financial liabilities:
Non-maturity deposits (Level 1)	1,762,697	1,604,535
Short-term borrowings (Level 1)		10,000
Accrued interest payable (Level 1)	2,479	1,466
Carrying Amount [Member] \| Fair Value, Inputs, Level 2 [Member]
Financial assets:
Securities held to maturity (Level 2)	34,626	36,735
Carrying Amount [Member] \| Fair Value, Inputs, Level 3 [Member]
Financial assets:
Loans, net of allowance for credit losses (Level 3)	2,189,326	2,104,517
Financial liabilities:
Time Deposits (Level 3)	609,955	594,264
Long-term borrowings (Level 3)	40,000
Note payable (Level 3)	572	590
Subordinated Notes (Level 3)	61,843	61,444
Fair Value [Member] \| Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and cash equivalents (Level 1)	191,232	80,190
Accrued interest receivable (Level 1)	9,588	9,831
Restricted investments in bank stock (Level 1)	4,904	3,965
Cash surrender value of life insurance (Level 1)	51,646	48,847
Financial liabilities:
Non-maturity deposits (Level 1)	1,762,697	1,604,535
Short-term borrowings (Level 1)		10,000
Accrued interest payable (Level 1)	2,479	1,466
Fair Value [Member] \| Fair Value, Inputs, Level 2 [Member]
Financial assets:
Securities held to maturity (Level 2)	32,823	34,236
Fair Value [Member] \| Fair Value, Inputs, Level 3 [Member]
Financial assets:
Loans, net of allowance for credit losses (Level 3)	2,208,344	2,027,937
Financial liabilities:
Time Deposits (Level 3)	608,781	589,699
Long-term borrowings (Level 3)	40,000
Note payable (Level 3)	572	590
Subordinated Notes (Level 3)	$ 59,197	$ 57,303

Accrued interest payable.

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- Definition

Accrued interest receivable fair value disclosure.

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Non maturity deposits.

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Amount 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. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value portion of the amount that could be realized under a life insurance contract or contracts owned by the entity, commonly known as corporate-owned life insurance (COLI) or bank-owned life insurance (BOLI).

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Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

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

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Net carrying amount of loans and leases receivable covered by loss sharing agreements.

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No definition available.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ References

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The aggregate value of all restricted investments.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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Amount of time deposit liabilities, including certificates of deposit.

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