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Loans and Allowance for Loan Losses - Average Recorded Investment Of Impaired Loans And Related Interest Income By Loan Portfolio Class (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Commercial Portfolio | Commercial and industrial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Loans with Allowance: Average Recorded Investment | $ 847 | $ 211 | $ 205
Impaired Loans with Allowance: Interest Income Recognized | 0 | 0 | 0
Impaired Loans, Average Recorded Investment, Total | 892 | 514 | 1,342
Impaired Loans, Interest Income Recognized, Total | 0 | 2 | 0
Commercial Portfolio | Commercial and industrial | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 45 | 303 | 1,136
Impaired Loans with No Allowance: Interest Income Recognized | 0 | 2 | 0
Commercial Portfolio | Commercial and industrial | Financial Asset Acquired with Credit Deterioration |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 0 | 0 | 1
Impaired Loans with No Allowance: Interest Income Recognized | 0 | 0 | 0
Commercial Portfolio | Commercial real estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Loans with Allowance: Average Recorded Investment | 167 | 1,011 | 752
Impaired Loans with Allowance: Interest Income Recognized | 0 | 0 | 0
Impaired Loans, Average Recorded Investment, Total | 3,967 | 4,804 | 11,554
Impaired Loans, Interest Income Recognized, Total | 0 | 2 | 5
Commercial Portfolio | Commercial real estate | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 907 | 2,308 | 9,379
Impaired Loans with No Allowance: Interest Income Recognized | 0 | 2 | 5
Commercial Portfolio | Commercial real estate | Financial Asset Acquired with Credit Deterioration |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 2,893 | 1,485 | 1,423
Impaired Loans with No Allowance: Interest Income Recognized | 0 | 0 | 0
Commercial Portfolio | Commercial real estate - construction |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Loans, Average Recorded Investment, Total | 89 | 148 | 44
Impaired Loans, Interest Income Recognized, Total | 0 | 0 | 0
Commercial Portfolio | Commercial real estate - construction | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 89 | 26 | 44
Impaired Loans with No Allowance: Interest Income Recognized | 0 | 0 | 0
Commercial Portfolio | Commercial real estate - construction | Financial Asset Acquired with Credit Deterioration |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 0 | 122 | 0
Impaired Loans with No Allowance: Interest Income Recognized | 0 | 0 | 0
Consumer Portfolio Segment | Residential mortgage |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Loans, Average Recorded Investment, Total | 2,010 | 1,375 | 1,359
Impaired Loans, Interest Income Recognized, Total | 23 | 26 | 26
Consumer Portfolio Segment | Residential mortgage | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 845 | 974 | 998
Impaired Loans with No Allowance: Interest Income Recognized | 23 | 26 | 26
Consumer Portfolio Segment | Residential mortgage | Financial Asset Acquired with Credit Deterioration |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 1,165 | 401 | 361
Impaired Loans with No Allowance: Interest Income Recognized | 0 | 0 | 0
Consumer Portfolio Segment | Home equity |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Loans with Allowance: Average Recorded Investment | 153 | 0 | 0
Impaired Loans with Allowance: Interest Income Recognized | 0 | 0 | 0
Impaired Loans, Average Recorded Investment, Total | 750 | 2,375 | 1,802
Impaired Loans, Interest Income Recognized, Total | 185 | 2 | 0
Consumer Portfolio Segment | Home equity | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 468 | 2,367 | 1,801
Impaired Loans with No Allowance: Interest Income Recognized | 185 | 2 | 0
Consumer Portfolio Segment | Home equity | Financial Asset Acquired with Credit Deterioration |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Impaired Loans with No Allowance: Average Recorded Investment | 129 | 8 | 1
Impaired Loans with No Allowance: Interest Income Recognized | $ 0 | $ 0 | $ 0

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