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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
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | $ 517,000 | $ 638,000
Percent of Total Loan Class | 0.38% | 0.47%
Guaranteed by Government-Related Entities |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | $ 36,000 | $ 44,000
Commercial and industrial |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | $ 111,000 | $ 184,000
Percent of Total Loan Class | 0.18% | 0.32%
Commercial | Commercial Real Estate |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | $ 131,000 | $ 270,000
Percent of Total Loan Class | 0.65% | 1.07%
Residential builder and developer | Commercial Real Estate |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | $ 0 | $ 2,000
Percent of Total Loan Class | 0.00% | 0.18%
Other commercial construction | Commercial Real Estate |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | $ 225,000 | $ 131,000
Percent of Total Loan Class | 4.53% | 2.11%
Residential | Residential Real Estate |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | $ 50,000 | $ 51,000
Percent of Total Loan Class | 0.22% | 0.22%
Home equity lines and loans | Consumer: |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | $ 0 | $ 0
Percent of Total Loan Class | 0.00% | 0.00%
Recreational finance | Consumer: |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | $ 0 | $ 0
Percent of Total Loan Class | 0.00% | 0.00%
Automobile | Consumer: |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | $ 0 | $ 0
Percent of Total Loan Class | 0.00% | 0.00%
Other | Consumer: |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | $ 0 | $ 0
Percent of Total Loan Class | 0.00% | 0.00%
Unfunded Loan Commitment |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | $ 9,000 | $ 29,000
Term Extension |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 431,000 | 584,000
Term Extension | Commercial and industrial |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 35,000 | 139,000
Term Extension | Commercial | Commercial Real Estate |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 131,000 | 267,000
Term Extension | Residential builder and developer | Commercial Real Estate |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 0 | 2,000
Term Extension | Other commercial construction | Commercial Real Estate |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 225,000 | 131,000
Term Extension | Residential | Residential Real Estate |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 40,000 | 45,000
Term Extension | Home equity lines and loans | Consumer: |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 0 | 0
Term Extension | Recreational finance | Consumer: |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 0 | 0
Term Extension | Automobile | Consumer: |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 0 | 0
Term Extension | Other | Consumer: |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 0 | 0
Other (a) |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 5,000 | 50,000
Other (a) | Commercial and industrial |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 2,000 | 45,000
Other (a) | Commercial | Commercial Real Estate |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 0 | 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
Other (a) | Other commercial construction | Commercial Real Estate |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 0 | 0
Other (a) | Residential | Residential Real Estate |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 3,000 | 5,000
Other (a) | Home equity lines and loans | Consumer: |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 0 | 0
Other (a) | Recreational finance | Consumer: |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 0 | 0
Other (a) | Automobile | Consumer: |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 0 | 0
Other (a) | Other | Consumer: |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 0 | 0
Combination of Modification Types |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 81,000 | 4,000
Combination of Modification Types | Commercial and industrial |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 74,000 | 0
Combination of Modification Types | Commercial | Commercial Real Estate |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 0 | 3,000
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
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
Combination of Modification Types | Residential | Residential Real Estate |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 7,000 | 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
Combination of Modification Types | Recreational finance | Consumer: |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 0 | 0
Combination of Modification Types | Automobile | Consumer: |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | 0 | 0
Combination of Modification Types | Other | Consumer: |  |
Financing Receivable, Modifications other than Troubled Debt Restructuring [Line Items] |  |
Modified in period | $ 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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