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Allowance For Loan Losses (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2020 USD ($) contract | Dec. 31, 2019 USD ($) contract | Dec. 31, 2018 USD ($)
Receivables [Abstract] |  |  |
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down | $ 200,000 | $ 200,000 | $ 200,000
Financing Receivable, Troubled Debt Restructuring, Subsequent Default |  | 3,000,000.0 |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 0 |  |
Loan Review Selection Threshold ($) | 1,000,000 | 1,000,000 | 1,000,000
Impaired Financing Receivable, Interest Income, Accrual Method | 100,000 | 100,000 | 100,000
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Loan Review Selection Threshold ($) | 1,000,000 | 1,000,000 | 1,000,000
Impaired Financing Receivable, Interest Income Foregone |  | 200,000 | 200,000
Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | 1,600,000 | 800,000 |
Financing Receivable, Troubled Debt Restructurings, Provision for Credit Losses | 100,000 | 100,000 | 100,000
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down | $ 200,000 | $ 200,000 | 200,000
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contract | 0 | 1 |
Financing Receivable, Troubled Debt Restructuring, Subsequent Default |  | $ 3,000,000.0 |
Total Troubled Debt Restructurings | $ 26,142,000 | 29,630,000 |
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Charge-Off |  | 700,000 |
Impaired Financing Receivable, Interest Income, Accrual Method | 100,000 | $ 100,000 | $ 100,000
Payment Deferral [Member] | COVID-19 [Member] | Consumer Borrower [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Loan Restructuring, Trial Modifications, Amount | 135,000,000 |  |
Loan Restructuring, Trial Modifications, Period End Amount | 9,000,000 |  |
Loan Restructuring, Trial Modifications, Resumed Payment, Amount | 126,000,000 |  |
Total Troubled Debt Restructurings | 4,000,000 |  |
Payment Deferral [Member] | COVID-19 [Member] | Commercial Borrower [Member] |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Loan Restructuring, Trial Modifications, Amount | 455,000,000 |  |
Loan Restructuring, Trial Modifications, Period End Amount | 99,000,000 |  |
Loan Restructuring, Trial Modifications, Resumed Payment, Amount | 356,000,000 |  |
Payment Deferral [Member] | COVID-19 [Member] | Commercial Real Estate Hotels |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Loan Restructuring, Trial Modifications, Period End Amount | $ 88,000,000 |  |

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