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Fair Values of Financial Instruments (Fair Value Measurements, Recurring) (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities Available for Sale | $ 82,603 | $ 99,756
Fair Value, Recurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities Available for Sale | 82,603 | 99,756
Marketable Equities | 23,534 | 17,717
Total Securities | 106,137 | 117,473
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Marketable Equities | 23,534 | 17,717
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fair Value, Recurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities Available for Sale |  |
Marketable Equities | 23,534 | 17,717
Total Securities | 23,534 | 17,717
Significant Other Observable Inputs (Level 2) [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities Available for Sale | 82,603 | 99,756
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Recurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities Available for Sale | 82,603 | 99,756
Total Securities | 82,603 | 99,756
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Recurring [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Debt Securities Available for Sale |  |
Marketable Equities |  |
Total Securities |  |

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