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Allowance for Credit Losses - Summary of Nonaccrual Loans Excluding Purchased Credit-Impaired (PCI) Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	$ 16,278	$ 16,849
Nonaccrual loans without a related ACL	6,464	14,101
Total, Non-Accrual Status	22,742	30,950
Commercial and Agriculture [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	9,986	8,901
Nonaccrual loans without a related ACL	1,937	3,370
Total, Non-Accrual Status	11,923	12,271
Commercial Real Estate Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	7	36
Nonaccrual loans without a related ACL	2,903
Total, Non-Accrual Status	2,910	36
Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	545	2,514
Nonaccrual loans without a related ACL		8,000
Total, Non-Accrual Status	545	10,514
Residential Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	4,911	4,745
Nonaccrual loans without a related ACL	1,624	2,131
Total, Non-Accrual Status	6,535	6,876
Lease Financing Receivable [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	799	638
Nonaccrual loans without a related ACL		600
Total, Non-Accrual Status	799	1,238
Consumer and Other [Member]
Financing Receivable Recorded Investment [Line Items]
Nonaccrual loans with a related ACL	30	15
Total, Non-Accrual Status	$ 30	$ 15

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