Loans and Allowance for Credit Losses - Summary of financial effects of TLMs (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Commercial And Industrial [Member] \| Extended Maturity [Member]
Loans and Leases Receivable Disclosure [Line Items]
Weighted Average Term Extension	20 months	56 months
Commercial And Industrial [Member] \| Interest Rate Below Market Reduction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Weighted Average Interest Rate Reduction	0.00%	11.28%
Commercial And Industrial [Member] \| Payment Deferral [Member]
Loans and Leases Receivable Disclosure [Line Items]
Weighted Average Payment Amount	$ 0	$ 44
Commercial And Industrial [Member] \| Interest Forgiveness [Member]
Loans and Leases Receivable Disclosure [Line Items]
Weighted Average Payment Amount	$ 0	$ 0
Consumer Loans [Member] \| Extended Maturity [Member]
Loans and Leases Receivable Disclosure [Line Items]
Weighted Average Term Extension		0 months
Consumer Loans [Member] \| Interest Rate Below Market Reduction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Weighted Average Interest Rate Reduction		0.00%
Consumer Loans [Member] \| Payment Deferral [Member]
Loans and Leases Receivable Disclosure [Line Items]
Weighted Average Payment Amount		$ 1
Consumer Loans [Member] \| Interest Forgiveness [Member]
Loans and Leases Receivable Disclosure [Line Items]
Weighted Average Payment Amount		$ 0
Real Estate Loan [Member] \| Commercial [Member] \| Extended Maturity [Member]
Loans and Leases Receivable Disclosure [Line Items]
Weighted Average Term Extension	13 months	84 months
Real Estate Loan [Member] \| Commercial [Member] \| Interest Rate Below Market Reduction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Weighted Average Interest Rate Reduction	0.00%	0.00%
Real Estate Loan [Member] \| Commercial [Member] \| Payment Deferral [Member]
Loans and Leases Receivable Disclosure [Line Items]
Weighted Average Payment Amount	$ 0	$ 0
Real Estate Loan [Member] \| Commercial [Member] \| Interest Forgiveness [Member]
Loans and Leases Receivable Disclosure [Line Items]
Weighted Average Payment Amount	$ 0	$ 0
Real Estate Loan [Member] \| Residential [Member] \| Extended Maturity [Member]
Loans and Leases Receivable Disclosure [Line Items]
Weighted Average Term Extension	15 months	84 months
Real Estate Loan [Member] \| Residential [Member] \| Interest Rate Below Market Reduction [Member]
Loans and Leases Receivable Disclosure [Line Items]
Weighted Average Interest Rate Reduction	0.00%	0.00%
Real Estate Loan [Member] \| Residential [Member] \| Payment Deferral [Member]
Loans and Leases Receivable Disclosure [Line Items]
Weighted Average Payment Amount	$ 0	$ 162
Real Estate Loan [Member] \| Residential [Member] \| Interest Forgiveness [Member]
Loans and Leases Receivable Disclosure [Line Items]
Weighted Average Payment Amount	$ 45	$ 0

Weighted average payment amount

No definition available.

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- Definition

Percentage of decrease in weighted average contractual interest rate of financing receivable modified for debtor experiencing financial difficulty.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481933/310-10-55-12A

+ Details

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- Definition

Period of increase in weighted average maturity of financing receivable modified for debtor experiencing financial difficulty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

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.

+ References

No definition available.

+ Details

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