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Loans and Allowance for Loan and Lease Losses (Narrative) (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) Loan contract Borrower | Dec. 31, 2019 USD ($) Loan contract | Dec. 31, 2018 USD ($) contract | Sep. 30, 2020 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Financing receivable deferred fees and costs | $ 9,084,000 | $ 1,081,000 |  |
Loans and leases receivable, impaired, interest lost on nonaccrual loans | 638,000 | 333,000 | $ 536,000 |
Loans and leases receivable, impaired, commitment to lend | 0 |  |  |
Financing receivable, modifications, recorded investment | $ 1,480,000 | $ 2,238,000 |  |
Number of troubled debt restructured loans | Loan | 0 | 0 |  |
Loan modifications to number of borrowers affected by Covid | Borrower | 1,000 |  |  |
Loans and leases receivable, gross, carrying amount | $ 2,384,041,000 | $ 1,762,756,000 | 1,624,067,000 |
Loans to certain executive officers, directors, and their related interests | 12,567,000 | 11,220,000 |  |
Loans to certain executive officers, directors, and their related interests, new loans and advances | 6,511,000 |  |  |
Loans to certain executive officers, directors, and their related interests, Repayments | $ 5,164,000 |  |  |
CARES Act [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Qualifying deferment status percentage of loan portfolio | 1.00% |  |  |
Loans and leases receivable, gross, carrying amount | $ 11,681,000 |  |  | $ 32,851,000
Entity Loan Modification Program [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Financing receivable, modifications, recorded investment | $ 582,000 | $ 43,000 | $ 266,000 |
Number of troubled debt restructured loans | contract | 3 | 2 | 1 |
Nonaccruing [Member] | Nine Loans With Sven Relationships [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Financing receivable, modifications, recorded investment | $ 1,017,000 |  |  |
Nonaccruing [Member] | One Large Relationships [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Financing receivable, modifications, recorded investment | 535,000 | $ 1,252,000 |  |
Nonaccruing [Member] | Eight Loans with Five Relationships [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Financing receivable, modifications, recorded investment |  | 1,748,000 |  |
Residential Mortgage [Member] | Residential Portfolio [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Financing receivable, modifications, recorded investment | 510,000 | 490,000 |  |
Loans and leases receivable, gross, carrying amount | 201,841,000 | 236,724,000 | $ 253,543,000 |
Residential Mortgage [Member] | Residential Portfolio [Member] | Entity Loan Modification Program [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Financing receivable, modifications, recorded investment | $ 47,000 |  |  |
Number of troubled debt restructured loans | contract | 2 |  |  |
Residential Mortgage [Member] | Residential Portfolio [Member] | Accruing | Three Unrelated Borrowers [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |  |
Financing receivable, modifications, recorded investment | $ 463,000 | $ 490,000 |  |

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