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Fair Value Measurements and Fair Values of Financial Instruments (Fair Value Measurements, Recurring) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Debt Securities Available for Sale $ 87,769 $ 91,715 $ 85,186
Marketable Equities 9,093 17,686 25,187
Total Securities 96,862 109,401 110,373
(Level 1) Quoted Prices in Active Markets for Identical Assets [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Marketable Equities 9,093 17,686 25,187
Total Securities 9,093 17,686 25,187
(Level 2) Significant Other Observable Inputs [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Debt Securities Available for Sale 87,769 91,715 85,186
Total Securities $ 87,769 $ 91,715 $ 85,186