Allowance for Credit Losses - Summary of Nonaccrual Loans Excluding Purchased Credit-Impaired (PCI) Loans (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2024	Dec. 31, 2023
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	$ 2,658	$ 1,198
Nonaccrual loans without a related ACL	10,577	11,269
Total Nonaccrual loans	13,235	12,467
Interest Income Recognized	54	46
Commercial and Agriculture [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	982	914
Nonaccrual loans without a related ACL	2,843	4,891
Total Nonaccrual loans	3,825	5,805
Interest Income Recognized	6	9
Commercial Real Estate Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	32	269
Nonaccrual loans without a related ACL	447	3
Total Nonaccrual loans	479	272
Interest Income Recognized	21	7
Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	1,059
Nonaccrual loans without a related ACL	1,954	1,167
Total Nonaccrual loans	3,013	1,167
Residential Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans without a related ACL	4,646	4,633
Total Nonaccrual loans	4,646	4,633
Interest Income Recognized	24	26
Real Estate Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans without a related ACL		41
Total Nonaccrual loans		41
Interest Income Recognized	2
Lease Financing Receivables [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	585	15
Nonaccrual loans without a related ACL	643	492
Total Nonaccrual loans	1,228	507
Consumer and Other [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans without a related ACL	44	42
Total Nonaccrual loans	44	42
Interest Income Recognized	$ 1	$ 4

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- Definition

Amount of interest income on financing receivable on nonaccrual status.

+ References

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- Definition

Amortized cost of financing receivable on nonaccrual status with no allowance for credit loss. Excludes net investment in lease.

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- Definition

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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Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease.

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