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Loans and Leases and the Allowance for Credit Losses - Loan Modification Activities to Borrowers Experiencing Financial Difficulty on Financing Receivables (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | $ 330,000 | $ 592,000 | $ 996,000 | $ 1,198,000
Percent of Total Loan Class | 0.24% | 0.45% | 0.73% | 0.91%
Commercial and industrial |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | $ 117,000 | $ 41,000 | $ 270,000 | $ 127,000
Percent of Total Loan Class | 0.19% | 0.07% | 0.44% | 0.23%
Commercial | Commercial Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | $ 164,000 | $ 278,000 | $ 425,000 | $ 423,000
Percent of Total Loan Class | 0.73% | 1.07% | 1.90% | 1.63%
Residential builder and developer | Commercial Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | $ 2,000 | $ 0 | $ 13,000 | $ 71,000
Percent of Total Loan Class | 0.17% | 0.00% | 1.27% | 6.42%
Other commercial construction | Commercial Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | $ 2,000 | $ 216,000 | $ 139,000 | $ 440,000
Percent of Total Loan Class | 0.03% | 3.20% | 2.62% | 6.54%
Residential | Residential Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | $ 42,000 | $ 55,000 | $ 139,000 | $ 125,000
Percent of Total Loan Class | 0.19% | 0.24% | 0.63% | 0.56%
Residential — limited documentation | Residential Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | $ 3,000 | $ 2,000 | $ 7,000 | $ 11,000
Percent of Total Loan Class | 0.41% | 0.18% | 0.86% | 1.11%
Home equity lines and loans | Consumer: |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | $ 0 | $ 0 | $ 2,000 | $ 1,000
Percent of Total Loan Class | 0.00% | 0.00% | 0.04% | 0.02%
Recreational finance | Consumer: |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | $ 0 | $ 0 | $ 1,000 | $ 0
Percent of Total Loan Class | 0.00% | 0.00% | 0.01% | 0.00%
Automobile | Consumer: |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | $ 0 | $ 0 | $ 0 | $ 0
Percent of Total Loan Class | 0.00% | 0.00% | 0.00% | 0.00%
Other | Consumer: |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | $ 0 | $ 0 | $ 0 | $ 0
Percent of Total Loan Class | 0.00% | 0.00% | 0.00% | 0.00%
Term Extension |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | $ 295,000 | $ 576,000 | $ 892,000 | $ 1,137,000
Term Extension | Commercial and industrial |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 92,000 | 40,000 | 190,000 | 115,000
Term Extension | Commercial | Commercial Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 163,000 | 272,000 | 420,000 | 409,000
Term Extension | Residential builder and developer | Commercial Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 2,000 | 0 | 13,000 | 70,000
Term Extension | Other commercial construction | Commercial Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 2,000 | 216,000 | 139,000 | 432,000
Term Extension | Residential | Residential Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 34,000 | 47,000 | 123,000 | 104,000
Term Extension | Residential — limited documentation | Residential Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 2,000 | 1,000 | 5,000 | 6,000
Term Extension | Home equity lines and loans | Consumer: |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 0 | 1,000 | 1,000
Term Extension | Recreational finance | Consumer: |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 0 | 1,000 | 0
Term Extension | Automobile | Consumer: |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 0 | 0 | 0
Term Extension | Other | Consumer: |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 0 | 0 | 0
Other (a) |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 29,000 | 8,000 | 91,000 | 32,000
Other (a) | Commercial and industrial |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 23,000 | 0 | 78,000 | 10,000
Other (a) | Commercial | Commercial Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 1,000 | 0 | 1,000 | 0
Other (a) | Residential builder and developer | Commercial Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 0 | 0 | 1,000
Other (a) | Other commercial construction | Commercial Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 0 | 0 | 0
Other (a) | Residential | Residential Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 4,000 | 7,000 | 10,000 | 17,000
Other (a) | Residential — limited documentation | Residential Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 1,000 | 1,000 | 2,000 | 4,000
Other (a) | Home equity lines and loans | Consumer: |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 0 | 0 | 0
Other (a) | Recreational finance | Consumer: |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 0 | 0 | 0
Other (a) | Automobile | Consumer: |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 0 | 0 | 0
Other (a) | Other | Consumer: |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 0 | 0 | 0
Combination of Modification Types |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 6,000 | 8,000 | 13,000 | 29,000
Combination of Modification Types | Commercial and industrial |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 2,000 | 1,000 | 2,000 | 2,000
Combination of Modification Types | Commercial | Commercial Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 6,000 | 4,000 | 14,000
Combination of Modification Types | Residential builder and developer | Commercial Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 0 | 0 | 0
Combination of Modification Types | Other commercial construction | Commercial Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 0 | 0 | 8,000
Combination of Modification Types | Residential | Residential Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 4,000 | 1,000 | 6,000 | 4,000
Combination of Modification Types | Residential — limited documentation | Residential Real Estate |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 0 | 0 | 1,000
Combination of Modification Types | Home equity lines and loans | Consumer: |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 0 | 1,000 | 0
Combination of Modification Types | Recreational finance | Consumer: |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 0 | 0 | 0
Combination of Modification Types | Automobile | Consumer: |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | 0 | 0 | 0 | 0
Combination of Modification Types | Other | Consumer: |  |  |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |  |  |
Modified in period | $ 0 | $ 0 | $ 0 | $ 0

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- Definition Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
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