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Loans - Modification Statuses by Portfolio Segment (Details) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 USD ($) loan | Sep. 30, 2019 USD ($) loan | Dec. 31, 2019 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 78 | 82 | 81
Percentage of loans receivable, by type | 100.00% | 100.00% | 100.00%
Balance | $ | $ 1,436,646 | $ 1,263,459 | $ 1,297,075
Commercial/Municipal Portfolio Segment | Exemption from Troubled Debt Restructure Designation, CARES Act |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 582 |  |
Percentage of loans receivable, by type | 100.00% |  |
Balance | $ | $ 228,069 |  |
Percentage of balance | 100.00% |  |
Commercial/Municipal Portfolio Segment | Paid Off | Exemption from Troubled Debt Restructure Designation, CARES Act |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 34 |  |
Percentage of loans receivable, by type | 6.00% |  |
Balance | $ | $ 6,031 |  |
Percentage of balance | 3.00% |  |
Commercial/Municipal Portfolio Segment | Subsequent Modification | Exemption from Troubled Debt Restructure Designation, CARES Act |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 41 |  |
Percentage of loans receivable, by type | 7.00% |  |
Balance | $ | $ 20,443 |  |
Percentage of balance | 9.00% |  |
Commercial/Municipal Portfolio Segment | Still in Original Modification | Exemption from Troubled Debt Restructure Designation, CARES Act |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 55 |  |
Percentage of loans receivable, by type | 9.00% |  |
Balance | $ | $ 30,188 |  |
Percentage of balance | 13.00% |  |
Commercial/Municipal Portfolio Segment | Out of Modification | Exemption from Troubled Debt Restructure Designation, CARES Act |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 452 |  |
Percentage of loans receivable, by type | 78.00% |  |
Balance | $ | $ 171,407 |  |
Percentage of balance | 75.00% |  |
Residential Portfolio Segment | Exemption from Troubled Debt Restructure Designation, CARES Act |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 350 |  |
Percentage of loans receivable, by type | 100.00% |  |
Balance | $ | $ 50,473 |  |
Percentage of balance | 100.00% |  |
Residential Portfolio Segment | Paid Off | Exemption from Troubled Debt Restructure Designation, CARES Act |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 17 |  |
Percentage of loans receivable, by type | 5.00% |  |
Balance | $ | $ 3,102 |  |
Percentage of balance | 6.00% |  |
Residential Portfolio Segment | Subsequent Modification | Exemption from Troubled Debt Restructure Designation, CARES Act |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 97 |  |
Percentage of loans receivable, by type | 28.00% |  |
Balance | $ | $ 13,857 |  |
Percentage of balance | 27.00% |  |
Residential Portfolio Segment | Still in Original Modification | Exemption from Troubled Debt Restructure Designation, CARES Act |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 125 |  |
Percentage of loans receivable, by type | 35.00% |  |
Balance | $ | $ 15,565 |  |
Percentage of balance | 31.00% |  |
Residential Portfolio Segment | Out of Modification | Exemption from Troubled Debt Restructure Designation, CARES Act |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 111 |  |
Percentage of loans receivable, by type | 32.00% |  |
Balance | $ | $ 17,949 |  |
Percentage of balance | 36.00% |  |
Consumer |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 1 | 0 | 0
Percentage of loans receivable, by type | 1.90% | 2.10% | 2.00%
Balance | $ | $ 27,323 | $ 25,919 | $ 26,503
Consumer | Exemption from Troubled Debt Restructure Designation, CARES Act |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 64 |  |
Percentage of loans receivable, by type | 100.00% |  |
Balance | $ | $ 1,120 |  |
Percentage of balance | 100.00% |  |
Consumer | Paid Off | Exemption from Troubled Debt Restructure Designation, CARES Act |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 8 |  |
Percentage of loans receivable, by type | 13.00% |  |
Balance | $ | $ 95 |  |
Percentage of balance | 9.00% |  |
Consumer | Subsequent Modification | Exemption from Troubled Debt Restructure Designation, CARES Act |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 0 |  |
Percentage of loans receivable, by type | 0.00% |  |
Balance | $ | $ 0 |  |
Percentage of balance | 0.00% |  |
Consumer | Still in Original Modification | Exemption from Troubled Debt Restructure Designation, CARES Act |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 52 |  |
Percentage of loans receivable, by type | 81.00% |  |
Balance | $ | $ 967 |  |
Percentage of balance | 86.00% |  |
Consumer | Out of Modification | Exemption from Troubled Debt Restructure Designation, CARES Act |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Units | loan | 4 |  |
Percentage of loans receivable, by type | 6.00% |  |
Balance | $ | $ 58 |  |
Percentage of balance | 5.00% |  |

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