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Allowance for Credit Losses - Summary of Nonaccrual Loans Excluding Purchased Credit-Impaired (PCI) Loans (Detail) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	$ 11,508	$ 1,198
Nonaccrual loans without a related ACL	4,446	11,269
Total Nonaccrual loans	15,954	12,467
Commercial and Agriculture [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	1,903	914
Nonaccrual loans without a related ACL	2,296	4,891
Total Nonaccrual loans	4,199	5,805
Commercial Real Estate Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	129	269
Nonaccrual loans without a related ACL		3
Total Nonaccrual loans	129	272
Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	3,012
Nonaccrual loans without a related ACL		1,167
Total Nonaccrual loans	3,012	1,167
Residential Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	4,942
Nonaccrual loans without a related ACL	2,046	4,633
Total Nonaccrual loans	6,988	4,633
Real Estate Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans without a related ACL		41
Total Nonaccrual loans		41
Lease Financing Receivables [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	1,495	15
Nonaccrual loans without a related ACL	104	492
Total Nonaccrual loans	1,599	507
Consumer and Other [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	27
Nonaccrual loans without a related ACL		42
Total Nonaccrual loans	$ 27	$ 42

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