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Loans and ACL - Summary of Amortized Cost of TLMs (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($) Loan	Mar. 31, 2024 USD ($) Loan
Loans and Leases Receivable Disclosure [Line Items]
Number of Loans, Term Extension and Deferral | Loan	0	1
Number of Loans, Interest forgiveness | Loan	1	0
Number of Loans, Payment Deferral | Loan	2	1
Number of Loans | Loan	3	2
Term Extension and Forbearance Amortized Cost | $	$ 0	$ 2,548
Modified Interest Forgiveness Amortized Cost | $	141	0
Payment Deferral Amortized Cost | $	502	565
Total Modified Loan Amortized Cost | $	$ 643	$ 3,113
Commercial and Industrial [Member] | Term extension and Forbearance [Member]
Loans and Leases Receivable Disclosure [Line Items]
Number of Loans, Term Extension and Deferral | Loan	0	1
Term Extension and Forbearance Amortized Cost | $	$ 0	$ 2,548
Amortized Cost of Modified Loans to Gross Loans by Category	0.00%	0.52%
Residential [Member] | Interest Forgiveness [Member] | Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Number of Loans, Interest forgiveness | Loan	1	0
Modified Interest Forgiveness Amortized Cost | $	$ 141	$ 0
Amortized Cost of Modified Loans to Gross Loans by Category	0.02%	0.00%
Residential [Member] | Payment Deferral [Member] | Real Estate [Member]
Loans and Leases Receivable Disclosure [Line Items]
Number of Loans, Payment Deferral | Loan	1	1
Payment Deferral Amortized Cost | $	$ 493	$ 565
Amortized Cost of Modified Loans to Gross Loans by Category	0.07%	0.08%
Consumer [Member] | Payment Deferral [Member]
Loans and Leases Receivable Disclosure [Line Items]
Number of Loans, Payment Deferral | Loan	1	0
Payment Deferral Amortized Cost | $	$ 9	$ 0
Amortized Cost of Modified Loans to Gross Loans by Category	0.02%	0.00%

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