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Loans and Allowance for Loan and Lease Losses (Narrative) (Details) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2022 USD ($) Loan | Dec. 31, 2021 USD ($) Loan | Mar. 31, 2021 USD ($)
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing receivable deferred fees and costs | $ 3,619,000 | $ 6,264,000 |
Allowance for loan losses | 15,147,000 | 14,597,000 |
Loans outstanding, net | 3,106,384,000 | 3,089,799,000 |
Financing receivable, modifications, recorded investment | $ 774,000 | $ 819,000 |
Number of troubled debt restructured loans | Loan | 0 | 0 |
Loans and leases receivable, gross, carrying amount | $ 3,121,531,000 | $ 3,104,396,000 | $ 2,646,236,000
CARES Act [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Loans and leases receivable, gross, carrying amount | $ 3,571,000 | $ 3,571,000 |
CARES Act [Member] | Maximum [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Qualifying deferment status percentage of loan portfolio | 1.00% | 1.00% |
Nonaccruing [Member] | Six Loans With Four Relationships [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing receivable, modifications, recorded investment | $ 344,000 |  |
Nonaccruing [Member] | Eight Loans With Six Relationships [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing receivable, modifications, recorded investment |  | $ 384,000 |
Residential Portfolio [Member] | Residential Mortgage [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing receivable, modifications, recorded investment | 465,000 | 472,000 |
Loans and leases receivable, gross, carrying amount | 305,311,000 | 323,223,000 | $ 197,788,000
Residential Portfolio [Member] | Residential Mortgage [Member] | Accruing | Two Unrelated Borrowers [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing receivable, modifications, recorded investment | 430,000 | 435,000 |
Residential Portfolio [Member] | Residential Mortgage [Member] | Nonaccruing [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing receivable, modifications, recorded investment | 35,000 | 37,000 |
PPP Loans [Member] | Small Business Administration [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Allowance for loan losses | 0 |  |
Loans outstanding, net | 34,124,000 | 111,286,000 |
Commercial Real Estate [Member] | Residential Portfolio [Member] | Residential Mortgage [Member] | Nonaccruing [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing receivable, modifications, recorded investment | $ 309,000 |  |
Commercial Real Estate [Member] | Residential Portfolio [Member] | Residential Mortgage [Member] | Nonaccruing [Member] | Two Borrowers [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing receivable, modifications, recorded investment |  | 320,000 |
Commercial Real Estate - Construction [Member] | Residential Portfolio [Member] | Residential Mortgage [Member] | Nonaccruing [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing receivable, modifications, recorded investment |  | 22,000 |
Commercial and Industrial [Member] | Residential Portfolio [Member] | Residential Mortgage [Member] | Nonaccruing [Member] |  |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |  |
Financing receivable, modifications, recorded investment |  | $ 5,000 |

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