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Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Narrative Disclosures) (Details) | 3 Months Ended | 6 Months Ended |
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Jun. 30, 2022 USD ($) loans | Jun. 30, 2021 USD ($) loans | Jun. 30, 2022 USD ($) loans | Jun. 30, 2021 USD ($) loans | Dec. 31, 2021 USD ($) loans
Financing Receivable, Recorded Investment |  |  |  |  |
SBA Paycheck Protection Program Loans Outstanding, Gross Amount | $ 8,300,000 |  | $ 8,300,000 |  | $ 27,900,000
Paycheck Protection Loans and Leases Receivable, Deferred Income | 113,000 |  | 113,000 |  | 557,000
SBA loans, considered impaired | 944,000 |  | 944,000 |  | 1,700,000
Guaranteed portion of SBA loans sold to third parties | 11,900,000 | $ 9,000,000 | 17,400,000 | $ 19,600,000 |
Total amount of outstanding SBA loans sold | 95,900,000 |  | 95,900,000 |  | 93,000,000
Loans and leases transferred to third parties total principal amount | 23,000,000 | $ 11,800,000 | 45,200,000 | $ 16,900,000 |
Gain (Loss) Recognized on Participation Interest in Originated Loans |  |  | 0 |  |
Total amount of outstanding loans transferred to third parties as loan participations | 199,000,000 |  | 199,000,000 |  | 195,200,000
Total amount of loan participations remaining on the Corporations balance sheet | 320,200,000 |  | 320,200,000 |  | 314,500,000
Loans in the participation sold portfolio, considered impaired, gross amount | 0 |  | 0 |  | 0
Loan participations purchased on the Corporation's balance sheet | 0 |  | 0 |  | 0
Non-accrual troubled debt restructurings | 615,000 |  | 615,000 |  | 627,000
Specific Reserves on Troubled Debt Restructurings | 138,000 |  | 138,000 |  | $ 134,000
Unfunded commitments, troubled debt restructurings | $ 0 |  | $ 0 |  |
Number of Loans | loans | 0 |  | 0 |  |
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | loans | 0 | 1 | 0 | 1 |
Financing Receivable, Troubled Debt Restructuring, Subsequent Default |  | $ 269,000 |  | $ 269,000 |
Number of Short-Term Loan Modifications | loans | 0 |  | 0 |  | 3
Gross Loans and Leases Outstanding, Short-Term Modification |  |  |  |  | $ 293,000
Loans and leases receivable, difference between recorded investment and unpaid principal balance | $ 144,000 |  | $ 144,000 |  | 145,000
Performing troubled debt restructurings | $ 188,000 |  | $ 188,000 |  | $ 217,000
Commercial and industrial |  |  |  |  |
Financing Receivable, Recorded Investment |  |  |  |  |
Number of Loans | loans |  | 0 |  | 1 |

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