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Loans, Allowance for Credit Losses and Credit Quality Schedule of Debtor Troubled Debt Restructurings, Subsequent Period (Details) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2019 USD ($) contract | Dec. 31, 2021 USD ($) contract | Dec. 31, 2020 USD ($) contract
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items] |  |  |
Troubled Debt Restructurings On Financing Receivables Post Modifications |  | The following table shows the troubled debt restructurings which occurred for the periods indicated and the change in the recorded investment subsequent to the modifications occurring:
| Year Ended
| December 31, 2021
| Number of Contracts |  | Pre-Modification Outstanding Recorded Investment |  | Post-Modification Outstanding Recorded Investment
Troubled debt restructurings |  |  | (Dollars in thousands)
Commercial and industrial | 1 |  |  | $ | 14,148 |  |  | $ | 14,148 |
Commercial real estate | 5 |  |  | 3,964 |  |  | 3,964 |
Small business | 2 |  |  | 189 |  |  | 189 |
Total (1) | 8 |  |  | $ | 18,301 |  |  | $ | 18,301 |
| Year Ended
| December 31, 2020
| Number of Contracts |  | Pre-Modification Outstanding Recorded Investment |  | Post-Modification Outstanding Recorded Investment
Troubled debt restructurings |  |  | (Dollars in thousands)
Commercial and industrial | 8 |  |  | $ | 732 |  |  | $ | 732 |
Commercial real estate | 10 |  |  | 2,865 |  |  | 2,865 |
Small business | 10 |  |  | 752 |  |  | 728 |
Residential real estate | 2 |  |  | 559 |  |  | 642 |
Total (1) | 30 |  |  | $ | 4,908 |  |  | $ | 4,967 |
| Year Ended
| December 31, 2019
| Number of Contracts |  | Pre-Modification Outstanding Recorded Investment |  | Post-Modification Outstanding Recorded Investment
Troubled debt restructurings |  |  | (Dollars in thousands)
Commercial and industrial | 3 |  |  | $ | 268 |  |  | $ | 268 |
Commercial real estate | 4 |  |  | 819 |  |  | 819 |
Small business | 1 |  |  | 14 |  |  | 14 |
Residential real estate | 3 |  |  | 967 |  |  | 1,009 |
Home equity | 2 |  |  | 121 |  |  | 121 |
Total (1) | 13 |  |  | $ | 2,189 |  |  | $ | 2,231 |
(1)The pre-modification and post-modification balances represent the legal principal balance of the loan. Activity presented in the tables above includes $14.3 million, $1.9 million, and $855,000 of modifications on existing TDRs during the years ended December 31, 2021, 2020 and 2019, respectively. |
Financing Receivable, Modifications, Number of Contracts | contract | 13 | 8 | 30
Financing Receivable, Troubled Debt Restructuring, Premodification | $ 2,189 | $ 18,301 | $ 4,908
Post-Modification Outstanding Recorded Investment | $ 2,231 | $ 18,301 | $ 4,967
Commercial And Industrial [Member] |  |  |
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 3 | 1 | 8
Financing Receivable, Troubled Debt Restructuring, Premodification | $ 268 | $ 14,148 | $ 732
Post-Modification Outstanding Recorded Investment | $ 268 | $ 14,148 | $ 732
Commercial Real Estate [Member] |  |  |
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 4 | 5 | 10
Financing Receivable, Troubled Debt Restructuring, Premodification | $ 819 | $ 3,964 | $ 2,865
Post-Modification Outstanding Recorded Investment | $ 819 | $ 3,964 | $ 2,865
Small Business [Member] |  |  |
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 1 | 2 | 10
Financing Receivable, Troubled Debt Restructuring, Premodification | $ 14 | $ 189 | $ 752
Post-Modification Outstanding Recorded Investment | $ 14 | $ 189 | $ 728
Residential Real Estate [Member] |  |  |
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 3 |  | 2
Financing Receivable, Troubled Debt Restructuring, Premodification | $ 967 |  | $ 559
Post-Modification Outstanding Recorded Investment | $ 1,009 |  | $ 642
Home Equity Line of Credit [Member] |  |  |
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | contract | 2 |  |
Financing Receivable, Troubled Debt Restructuring, Premodification | $ 121 |  |
Post-Modification Outstanding Recorded Investment | $ 121 |  |

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
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