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Derivative Financial Instruments (Narrative) (Details) - Interest Rate Swaps on Trust Preferred Securities [Member] - Not Designated as Hedging Instrument [Member] - Riverview [Member] - USD ($) |  | 12 Months Ended
--- | --- | ---
Nov. 30, 2021 | Dec. 31, 2021
Derivative [Line Items] |  |
Notional amount | $ 9,279,000 |
Derivative, weighted average rate calculation period | 10 years |
Derivative, weighted average rate | 2.99% |
Derivative, weighted average remaining maturity |  | 8 years 6 months
Derivative, estimated fair value |  | $ 629,000
Other Income [Member] |  |
Derivative [Line Items] |  |
Derivative, change in fair value recoded as a component of other income |  | $ 34,000

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- Definition Average remaining period until maturity of the derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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