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Loans - Summary of Average of Impaired Loans and Related Interest Income by Loan Portfolio Class (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with Allowance: Average Recorded Investment | $ 2,236 | $ 36 | $ 1,414 | $ 18
Impaired Loans with Allowance: Interest Income | 0 | 0 | 0 | 0
Impaired Loans with No Allowance: Average Recorded Investment | 7,394 | 6,640 | 7,472 | 6,942
Impaired Loans with No Allowance: Interest Income | 45 | 144 | 167 | 462
Commercial and industrial |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with Allowance: Average Recorded Investment | 26 | 36 | 44 | 18
Impaired Loans with Allowance: Interest Income | 0 | 0 | 0 | 0
Impaired Loans with No Allowance: Average Recorded Investment | 23 | 0 | 12 | 0
Impaired Loans with No Allowance: Interest Income | 0 | 0 | 0 | 0
Commercial real estate |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with Allowance: Average Recorded Investment | 2,210 | 0 | 1,370 | 0
Impaired Loans with Allowance: Interest Income | 0 | 0 | 0 | 0
Impaired Loans with No Allowance: Average Recorded Investment | 6,075 | 6,163 | 6,707 | 6,435
Impaired Loans with No Allowance: Interest Income | 42 | 136 | 157 | 454
Commercial real estate construction |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with Allowance: Average Recorded Investment | 0 | 0 | 0 | 0
Impaired Loans with Allowance: Interest Income | 0 | 0 | 0 | 0
Impaired Loans with No Allowance: Average Recorded Investment | 1,173 | 0 | 586 | 0
Impaired Loans with No Allowance: Interest Income | 0 | 0 | 0 | 0
Residential mortgage |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with Allowance: Average Recorded Investment | 0 | 0 | 0 | 0
Impaired Loans with Allowance: Interest Income | 0 | 0 | 0 | 0
Impaired Loans with No Allowance: Average Recorded Investment | 101 | 430 | 118 | 484
Impaired Loans with No Allowance: Interest Income | 0 | 8 | 7 | 8
Home equity lines of credit |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Impaired Loans with Allowance: Average Recorded Investment | 0 | 0 | 0 | 0
Impaired Loans with Allowance: Interest Income | 0 | 0 | 0 | 0
Impaired Loans with No Allowance: Average Recorded Investment | 22 | 47 | 49 | 23
Impaired Loans with No Allowance: Interest Income | $ 3 | $ 0 | $ 3 | $ 0

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