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Loans and Leases and the Allowance for Credit Losses - Summary of Loan grades applied various classes of Commercial and Real Estate Loans (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | $ 15,279,000 |  | $ 15,279,000 |  | $ 18,423,000
Year two | 15,890,000 |  | 15,890,000 |  | 21,683,000
Year three | 18,767,000 |  | 18,767,000 |  | 15,025,000
Year four | 12,542,000 |  | 12,542,000 |  | 10,555,000
Year five | 8,957,000 |  | 8,957,000 |  | 10,062,000
Prior | 30,732,000 |  | 30,732,000 |  | 27,464,000
Total | 135,920,000 |  | 135,920,000 |  | 134,068,000
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
Year one | 12,000 |  | 19,000 |  |
Year two | 20,000 |  | 55,000 |  |
Year three | 35,000 |  | 76,000 |  |
Year four | 10,000 |  | 42,000 |  |
Year five | 7,000 |  | 31,000 |  |
Prior | 39,000 |  | 127,000 |  |
Total | 154,000 | $ 122,000 | 497,000 | $ 379,000 |
Commercial and industrial |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 7,020,000 |  | 7,020,000 |  | 9,010,000
Year two | 7,474,000 |  | 7,474,000 |  | 8,434,000
Year three | 6,992,000 |  | 6,992,000 |  | 5,133,000
Year four | 4,089,000 |  | 4,089,000 |  | 2,465,000
Year five | 1,991,000 |  | 1,991,000 |  | 2,332,000
Prior | 6,355,000 |  | 6,355,000 |  | 5,474,000
Revolving Loans | 26,958,000 |  | 26,958,000 |  | 24,048,000
Revolving Loans Converted to Term Loans | 133,000 |  | 133,000 |  | 114,000
Total | 61,012,000 |  | 61,012,000 |  | 57,010,000
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
Year one | 3,000 |  | 4,000 |  |
Year two | 10,000 |  | 24,000 |  |
Year three | 25,000 |  | 44,000 |  |
Year four | 4,000 |  | 19,000 |  |
Year five | 2,000 |  | 12,000 |  |
Prior | 8,000 |  | 22,000 |  |
Revolving Loans | 12,000 |  | 95,000 |  |
Revolving Loans Converted to Term Loans | 0 |  | 0 |  |
Total | 64,000 |  | 220,000 |  |
Commercial and industrial | Pass |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 6,885,000 |  | 6,885,000 |  | 8,689,000
Year two | 7,018,000 |  | 7,018,000 |  | 8,087,000
Year three | 6,491,000 |  | 6,491,000 |  | 4,800,000
Year four | 3,825,000 |  | 3,825,000 |  | 2,248,000
Year five | 1,802,000 |  | 1,802,000 |  | 2,169,000
Prior | 5,440,000 |  | 5,440,000 |  | 4,843,000
Revolving Loans | 25,290,000 |  | 25,290,000 |  | 22,345,000
Revolving Loans Converted to Term Loans | 78,000 |  | 78,000 |  | 70,000
Total | 56,829,000 |  | 56,829,000 |  | 53,251,000
Commercial and industrial | Criticized accrual |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 128,000 |  | 128,000 |  | 292,000
Year two | 400,000 |  | 400,000 |  | 279,000
Year three | 419,000 |  | 419,000 |  | 277,000
Year four | 218,000 |  | 218,000 |  | 142,000
Year five | 122,000 |  | 122,000 |  | 127,000
Prior | 641,000 |  | 641,000 |  | 481,000
Revolving Loans | 1,408,000 |  | 1,408,000 |  | 1,460,000
Revolving Loans Converted to Term Loans | 37,000 |  | 37,000 |  | 31,000
Total | 3,373,000 |  | 3,373,000 |  | 3,089,000
Commercial and industrial | Criticized nonaccrual |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 7,000 |  | 7,000 |  | 29,000
Year two | 56,000 |  | 56,000 |  | 68,000
Year three | 82,000 |  | 82,000 |  | 56,000
Year four | 46,000 |  | 46,000 |  | 75,000
Year five | 67,000 |  | 67,000 |  | 36,000
Prior | 274,000 |  | 274,000 |  | 150,000
Revolving Loans | 260,000 |  | 260,000 |  | 243,000
Revolving Loans Converted to Term Loans | 18,000 |  | 18,000 |  | 13,000
Total | 810,000 |  | 810,000 |  | 670,000
Commercial Real Estate |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
Total | 24,000 | $ 52,000 | 92,000 | $ 180,000 |
Commercial Real Estate | Commercial |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 1,008,000 |  | 1,008,000 |  | 2,275,000
Year two | 1,957,000 |  | 1,957,000 |  | 2,679,000
Year three | 2,099,000 |  | 2,099,000 |  | 1,835,000
Year four | 1,545,000 |  | 1,545,000 |  | 2,580,000
Year five | 2,545,000 |  | 2,545,000 |  | 4,118,000
Prior | 12,809,000 |  | 12,809,000 |  | 11,340,000
Revolving Loans | 408,000 |  | 408,000 |  | 450,000
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 22,371,000 |  | 22,371,000 |  | 25,277,000
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  |
Year two | 0 |  | 4,000 |  |
Year three | 0 |  | 0 |  |
Year four | 0 |  | 0 |  |
Year five | 0 |  | 5,000 |  |
Prior | 24,000 |  | 67,000 |  |
Revolving Loans | 0 |  | 0 |  |
Revolving Loans Converted to Term Loans | 0 |  | 0 |  |
Total | 24,000 |  | 76,000 |  |
Commercial Real Estate | Commercial | Pass |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 1,003,000 |  | 1,003,000 |  | 2,048,000
Year two | 1,648,000 |  | 1,648,000 |  | 1,742,000
Year three | 1,296,000 |  | 1,296,000 |  | 1,367,000
Year four | 1,190,000 |  | 1,190,000 |  | 2,011,000
Year five | 1,861,000 |  | 1,861,000 |  | 3,059,000
Prior | 10,308,000 |  | 10,308,000 |  | 8,491,000
Revolving Loans | 383,000 |  | 383,000 |  | 440,000
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 17,689,000 |  | 17,689,000 |  | 19,158,000
Commercial Real Estate | Commercial | Criticized accrual |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 5,000 |  | 5,000 |  | 227,000
Year two | 308,000 |  | 308,000 |  | 891,000
Year three | 752,000 |  | 752,000 |  | 465,000
Year four | 323,000 |  | 323,000 |  | 456,000
Year five | 648,000 |  | 648,000 |  | 966,000
Prior | 2,044,000 |  | 2,044,000 |  | 2,238,000
Revolving Loans | 24,000 |  | 24,000 |  | 7,000
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 4,104,000 |  | 4,104,000 |  | 5,250,000
Commercial Real Estate | Commercial | Criticized nonaccrual |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 1,000 |  | 1,000 |  | 46,000
Year three | 51,000 |  | 51,000 |  | 3,000
Year four | 32,000 |  | 32,000 |  | 113,000
Year five | 36,000 |  | 36,000 |  | 93,000
Prior | 457,000 |  | 457,000 |  | 611,000
Revolving Loans | 1,000 |  | 1,000 |  | 3,000
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 578,000 |  | 578,000 |  | 869,000
Commercial Real Estate | Residential builder and developer |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 342,000 |  | 342,000 |  | 531,000
Year two | 366,000 |  | 366,000 |  | 270,000
Year three | 124,000 |  | 124,000 |  | 74,000
Year four | 26,000 |  | 26,000 |  | 6,000
Year five | 4,000 |  | 4,000 |  | 61,000
Prior | 28,000 |  | 28,000 |  | 12,000
Revolving Loans | 102,000 |  | 102,000 |  | 119,000
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 992,000 |  | 992,000 |  | 1,073,000
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  |
Year two | 0 |  | 0 |  |
Year three | 0 |  | 0 |  |
Year four | 0 |  | 0 |  |
Year five | 0 |  | 0 |  |
Prior | 0 |  | 2,000 |  |
Revolving Loans | 0 |  | 0 |  |
Revolving Loans Converted to Term Loans | 0 |  | 0 |  |
Total | 0 |  | 2,000 |  |
Commercial Real Estate | Residential builder and developer | Pass |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 333,000 |  | 333,000 |  | 530,000
Year two | 323,000 |  | 323,000 |  | 252,000
Year three | 78,000 |  | 78,000 |  | 41,000
Year four | 19,000 |  | 19,000 |  | 6,000
Year five | 4,000 |  | 4,000 |  | 2,000
Prior | 11,000 |  | 11,000 |  | 12,000
Revolving Loans | 101,000 |  | 101,000 |  | 116,000
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 869,000 |  | 869,000 |  | 959,000
Commercial Real Estate | Residential builder and developer | Criticized accrual |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 9,000 |  | 9,000 |  | 1,000
Year two | 43,000 |  | 43,000 |  | 18,000
Year three | 46,000 |  | 46,000 |  | 30,000
Year four | 6,000 |  | 6,000 |  | 0
Year five | 0 |  | 0 |  | 59,000
Prior | 16,000 |  | 16,000 |  | 0
Revolving Loans | 1,000 |  | 1,000 |  | 3,000
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 121,000 |  | 121,000 |  | 111,000
Commercial Real Estate | Residential builder and developer | Criticized nonaccrual |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 0
Year three | 0 |  | 0 |  | 3,000
Year four | 1,000 |  | 1,000 |  | 0
Year five | 0 |  | 0 |  | 0
Prior | 1,000 |  | 1,000 |  | 0
Revolving Loans | 0 |  | 0 |  | 0
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 2,000 |  | 2,000 |  | 3,000
Commercial Real Estate | Other commercial construction |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 87,000 |  | 87,000 |  | 866,000
Year two | 1,377,000 |  | 1,377,000 |  | 1,771,000
Year three | 1,891,000 |  | 1,891,000 |  | 1,051,000
Year four | 746,000 |  | 746,000 |  | 1,110,000
Year five | 521,000 |  | 521,000 |  | 1,261,000
Prior | 644,000 |  | 644,000 |  | 562,000
Revolving Loans | 54,000 |  | 54,000 |  | 32,000
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 5,320,000 |  | 5,320,000 |  | 6,653,000
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, by Origination Year [Abstract] |  |  |  |  |
Year one | 0 |  | 0 |  |
Year two | 0 |  | 0 |  |
Year three | 0 |  | 2,000 |  |
Year four | 0 |  | 0 |  |
Year five | 0 |  | 0 |  |
Prior | 0 |  | 10,000 |  |
Revolving Loans | 0 |  | 2,000 |  |
Revolving Loans Converted to Term Loans | 0 |  | 0 |  |
Total | 0 |  | 14,000 |  |
Commercial Real Estate | Other commercial construction | Pass |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 68,000 |  | 68,000 |  | 813,000
Year two | 1,290,000 |  | 1,290,000 |  | 1,366,000
Year three | 1,213,000 |  | 1,213,000 |  | 651,000
Year four | 283,000 |  | 283,000 |  | 373,000
Year five | 161,000 |  | 161,000 |  | 646,000
Prior | 339,000 |  | 339,000 |  | 187,000
Revolving Loans | 46,000 |  | 46,000 |  | 30,000
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 3,400,000 |  | 3,400,000 |  | 4,066,000
Commercial Real Estate | Other commercial construction | Criticized accrual |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 19,000 |  | 19,000 |  | 53,000
Year two | 87,000 |  | 87,000 |  | 391,000
Year three | 673,000 |  | 673,000 |  | 390,000
Year four | 454,000 |  | 454,000 |  | 691,000
Year five | 311,000 |  | 311,000 |  | 565,000
Prior | 284,000 |  | 284,000 |  | 326,000
Revolving Loans | 8,000 |  | 8,000 |  | 0
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | 1,836,000 |  | 1,836,000 |  | 2,416,000
Commercial Real Estate | Other commercial construction | Criticized nonaccrual |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Year one | 0 |  | 0 |  | 0
Year two | 0 |  | 0 |  | 14,000
Year three | 5,000 |  | 5,000 |  | 10,000
Year four | 9,000 |  | 9,000 |  | 46,000
Year five | 49,000 |  | 49,000 |  | 50,000
Prior | 21,000 |  | 21,000 |  | 49,000
Revolving Loans | 0 |  | 0 |  | 2,000
Revolving Loans Converted to Term Loans | 0 |  | 0 |  | 0
Total | $ 84,000 |  | $ 84,000 |  | $ 171,000

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