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Loans and Allowance for Credit Losses on Loans - Schedule of Loans Outstanding and Aging Analysis (Details) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 USD ($) loan | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) loan | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | $ 2,090,091,000 |  | $ 2,090,091,000 |  | $ 2,073,720,000
Number of loans 90 days past due and still accruing | loan | 0 |  | 0 |  | 0
Financing receivable, nonaccrual, earning interest on cash basis | $ 0 |  | $ 0 |  | $ 0
Nonaccrual interest income reversal | 257,000 | $ 131,000 | 523,000 | $ 158,000 |
Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 2,090,091,000 |  | 2,090,091,000 |  | 2,073,720,000
Non-accrual loans | 39,883,000 |  | 39,883,000 |  | 7,992,000
Non-accrual loans with no allowance | 4,042,000 |  | 4,042,000 |  | 3,091,000
Total past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 27,013,000 |  | 27,013,000 |  | 7,664,000
30-59 days past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 4,220,000 |  | 4,220,000 |  | 3,930,000
60-89 days past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 3,577,000 |  | 3,577,000 |  | 2,274,000
90 days or more past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 19,216,000 |  | 19,216,000 |  | 1,460,000
Current | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 2,063,078,000 |  | 2,063,078,000 |  | 2,066,056,000
Commercial loans | Commercial and industrial |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 160,390,000 |  | 160,390,000 |  | 153,750,000
Commercial loans | Commercial and industrial | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 160,390,000 |  | 160,390,000 |  | 153,750,000
Non-accrual loans | 7,483,000 |  | 7,483,000 |  | 4,008,000
Non-accrual loans with no allowance | 0 |  | 0 |  | 1,311,000
Commercial loans | Commercial and industrial | Total past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 8,035,000 |  | 8,035,000 |  | 4,371,000
Commercial loans | Commercial and industrial | 30-59 days past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 547,000 |  | 547,000 |  | 2,991,000
Commercial loans | Commercial and industrial | 60-89 days past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 4,000 |  | 4,000 |  | 69,000
Commercial loans | Commercial and industrial | 90 days or more past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 7,484,000 |  | 7,484,000 |  | 1,311,000
Commercial loans | Commercial and industrial | Current | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 152,355,000 |  | 152,355,000 |  | 149,379,000
Commercial real estate loans | Commercial owner-occupied |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 318,712,000 |  | 318,712,000 |  | 333,181,000
Commercial real estate loans | Commercial owner-occupied | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 318,712,000 |  | 318,712,000 |  | 333,181,000
Non-accrual loans | 1,578,000 |  | 1,578,000 |  | 434,000
Non-accrual loans with no allowance | 1,578,000 |  | 1,578,000 |  | 434,000
Commercial real estate loans | Commercial owner-occupied | Total past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 2,392,000 |  | 2,392,000 |  | 767,000
Commercial real estate loans | Commercial owner-occupied | 30-59 days past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 2,270,000 |  | 2,270,000 |  | 618,000
Commercial real estate loans | Commercial owner-occupied | 60-89 days past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 0 |  | 0 |  | 0
Commercial real estate loans | Commercial owner-occupied | 90 days or more past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 122,000 |  | 122,000 |  | 149,000
Commercial real estate loans | Commercial owner-occupied | Current | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 316,320,000 |  | 316,320,000 |  | 332,414,000
Commercial real estate loans | Commercial non-owner occupied |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 1,266,377,000 |  | 1,266,377,000 |  | 1,219,385,000
Commercial real estate loans | Commercial non-owner occupied | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 1,266,377,000 |  | 1,266,377,000 |  | 1,219,385,000
Non-accrual loans | 29,229,000 |  | 29,229,000 |  | 3,081,000
Non-accrual loans with no allowance | 871,000 |  | 871,000 |  | 877,000
Commercial real estate loans | Commercial non-owner occupied | Total past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 14,146,000 |  | 14,146,000 |  | 2,204,000
Commercial real estate loans | Commercial non-owner occupied | 30-59 days past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 89,000 |  | 89,000 |  | 0
Commercial real estate loans | Commercial non-owner occupied | 60-89 days past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 2,917,000 |  | 2,917,000 |  | 2,204,000
Commercial real estate loans | Commercial non-owner occupied | 90 days or more past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 11,140,000 |  | 11,140,000 |  | 0
Commercial real estate loans | Commercial non-owner occupied | Current | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 1,252,231,000 |  | 1,252,231,000 |  | 1,217,181,000
Commercial real estate loans | Construction |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 39,326,000 |  | 39,326,000 |  | 99,164,000
Commercial real estate loans | Construction | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 39,326,000 |  | 39,326,000 |  | 99,164,000
Non-accrual loans | 0 |  | 0 |  | 0
Non-accrual loans with no allowance | 0 |  | 0 |  | 0
Commercial real estate loans | Construction | Total past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 0 |  | 0 |  | 0
Commercial real estate loans | Construction | 30-59 days past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 0 |  | 0 |  | 0
Commercial real estate loans | Construction | 60-89 days past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 0 |  | 0 |  | 0
Commercial real estate loans | Construction | 90 days or more past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 0 |  | 0 |  | 0
Commercial real estate loans | Construction | Current | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 39,326,000 |  | 39,326,000 |  | 99,164,000
Residential loans | Home equity |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 86,479,000 |  | 86,479,000 |  | 82,087,000
Residential loans | Home equity | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 86,479,000 |  | 86,479,000 |  | 82,087,000
Non-accrual loans | 1,161,000 |  | 1,161,000 |  | 469,000
Non-accrual loans with no allowance | 1,161,000 |  | 1,161,000 |  | 469,000
Residential loans | Home equity | Total past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 2,060,000 |  | 2,060,000 |  | 43,000
Residential loans | Home equity | 30-59 days past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 1,152,000 |  | 1,152,000 |  | 43,000
Residential loans | Home equity | 60-89 days past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 654,000 |  | 654,000 |  | 0
Residential loans | Home equity | 90 days or more past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 254,000 |  | 254,000 |  | 0
Residential loans | Home equity | Current | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 84,419,000 |  | 84,419,000 |  | 82,044,000
Residential loans | Other residential |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 150,573,000 |  | 150,573,000 |  | 118,508,000
Residential loans | Other residential | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 150,573,000 |  | 150,573,000 |  | 118,508,000
Non-accrual loans | 0 |  | 0 |  | 0
Non-accrual loans with no allowance | 0 |  | 0 |  | 0
Residential loans | Other residential | Total past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 0 |  | 0 |  | 83,000
Residential loans | Other residential | 30-59 days past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 0 |  | 0 |  | 83,000
Residential loans | Other residential | 60-89 days past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 0 |  | 0 |  | 0
Residential loans | Other residential | 90 days or more past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 0 |  | 0 |  | 0
Residential loans | Other residential | Current | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 150,573,000 |  | 150,573,000 |  | 118,425,000
Consumer loans | Installment and other consumer loans |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 68,234,000 |  | 68,234,000 |  | 67,645,000
Consumer loans | Installment and other consumer loans | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 68,234,000 |  | 68,234,000 |  | 67,645,000
Non-accrual loans | 432,000 |  | 432,000 |  | 0
Non-accrual loans with no allowance | 432,000 |  | 432,000 |  | 0
Consumer loans | Installment and other consumer loans | Total past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 380,000 |  | 380,000 |  | 196,000
Consumer loans | Installment and other consumer loans | 30-59 days past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 162,000 |  | 162,000 |  | 195,000
Consumer loans | Installment and other consumer loans | 60-89 days past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 2,000 |  | 2,000 |  | 1,000
Consumer loans | Installment and other consumer loans | 90 days or more past due | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | 216,000 |  | 216,000 |  | 0
Consumer loans | Installment and other consumer loans | Current | Financial asset, other than financial asset acquired with credit deterioration |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Loans, at amortized cost | $ 67,854,000 |  | $ 67,854,000 |  | $ 67,449,000

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