Loans and Leases - Schedule of Financial Effect on Accruing and Nonaccruing Modified Loans to Borrowers Experiencing Financial Difficulty (Detail)	12 Months Ended
Dec. 31, 2023 loan
Accrual Modified Loans
Concessions granted on accruing and non-accrual loans restructured
No. of loans	2
Accrual Modified Loans \| Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of loans	2
Nonaccrual Modified Loans
Concessions granted on accruing and non-accrual loans restructured
No. of loans	1
Nonaccrual Modified Loans \| Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of loans	1
Real Estate-Commercial [Member] \| Accrual Modified Loans \| Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of loans	2
Financing Receivable, Modified, Weighted Average Term Increase from Modification	1 year 1 month 6 days
Real Estate-Commercial [Member] \| Nonaccrual Modified Loans
Concessions granted on accruing and non-accrual loans restructured
No. of loans	1
Real Estate-Commercial [Member] \| Nonaccrual Modified Loans \| Maturity Date Extension [Member]
Concessions granted on accruing and non-accrual loans restructured
No. of loans	1
Financing Receivable, Modified, Weighted Average Term Increase from Modification	1 year 3 months 18 days

Number of financing receivables that have been modified by troubled debt restructurings.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 33
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-33

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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

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

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- Definition

Concessions granted on accruing and nonaccrual loans restructured.

+ References

No definition available.

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