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Loans and ACL - Summary of Amortized Cost of TLMs (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2025 USD ($) Loan	Sep. 30, 2024 USD ($) Loan
Loans and Leases Receivable Disclosure [Line Items]
Number of Loans, Interest forgiveness | Loan	1	0
Number of Loans | Loan	1	0
Modified Interest Forgiveness Amortized Cost | $	$ 139	$ 0
Total Modified Loan Amortized Cost | $	$ 139	$ 0
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 | $	$ 139	$ 0
Amortized Cost of Modified Loans to Gross Loans by Category	0.02%	0.00%

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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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