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Loans and ACL - Summary of Amortized Cost of Collateral Dependent Loans (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Loans and Leases Receivable Disclosure [Line Items]
Amortized cost of collateral dependent loans	$ 113,752
Commercial and Industrial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized cost of collateral dependent loans	83,437
Real Estate [Member] | Commercial and Industrial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized cost of collateral dependent loans	6,635
Real Estate [Member] | Construction, Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized cost of collateral dependent loans	2,299
Real Estate [Member] | Mortgage, Commercial [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized cost of collateral dependent loans	18,352
Real Estate [Member] | Mortgage, Residential [Member]
Loans and Leases Receivable Disclosure [Line Items]
Amortized cost of collateral dependent loans	$ 3,029

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