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Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Equity, Class of Treasury Stock [Line Items] |  |
Common Stock, Par Value Per Share | $ 1.00 | $ 1.00
Repurchase plan period, in years | 1 year |
Shares held at cost | 269,529 | 321,517
Common stock shares authorized | 15,000,000 | 15,000,000
Dividend Reinvestment Plan (DRIP) [Member] |  |
Equity, Class of Treasury Stock [Line Items] |  |
Common stock shares authorized | 1,000,000 |
Addition to capital from dividend reinvestment plan | $ 2.4 |
Shares purchased through DRIP, shares | 77,851 |
Dividend Reinvestment plan shares remain to be issues | 311,853 |
Dividend Reinvestment Plan (DRIP) - Quarterly Dividends [Member] |  |
Equity, Class of Treasury Stock [Line Items] |  |
Addition to capital from dividend reinvestment plan | $ 1.0 |
Dividend Reinvestment Plan (DRIP) - Optional Cash Contributions [Member] |  |
Equity, Class of Treasury Stock [Line Items] |  |
Addition to capital from dividend reinvestment plan | $ 1.4 |

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