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Loans and Allowance for Credit Losses on Loans (Troubled Debt Restructuring by Portfolio Segment) (Details) | 12 Months Ended
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Dec. 31, 2021 USD ($) loan | Dec. 31, 2020 USD ($) loan | Dec. 31, 2019 USD ($) loan
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | 3 | 0 | 2
Pre-Modification Outstanding Recorded Investment | $ 346,000 | $ 0 | $ 64,000
Post-Modification Outstanding Recorded Investment | 357,000 | 0 | 69,000
Specific Reserve | $ 6,000 | $ 0 | $ 15,000
Home equity | Interest Rate Concession and Payment Deferral |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | loan | 1 | 0 |
Pre-Modification Outstanding Recorded Investment | $ 159,000 | $ 0 |
Post-Modification Outstanding Recorded Investment | 170,000 | 0 |
Specific Reserve | $ 0 | $ 0 |
Home equity | Extended Maturity |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | loan | 2 | 0 | 0
Pre-Modification Outstanding Recorded Investment | $ 187,000 | $ 0 | $ 0
Post-Modification Outstanding Recorded Investment | 187,000 | 0 | 0
Specific Reserve | $ 6,000 | $ 0 | $ 0
Home Equity Loan | Interest Rate and Maturity Concession |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Number of Contracts | loan | 0 | 0 | 2
Pre-Modification Outstanding Recorded Investment | $ 0 | $ 0 | $ 64,000
Post-Modification Outstanding Recorded Investment | 0 | 0 | 69,000
Specific Reserve | $ 0 | $ 0 | $ 15,000

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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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- Definition Amount, after troubled debt restructuring, of modified financing receivable. + 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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