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Capital Notes (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 20, 2020
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]      
Proceeds used to pay off debt     $ 5,000
2020 Offering [Member]      
Debt Instrument [Line Items]      
Capital notes, interest rate   3.25%  
Capital notes, maturity date   Jun. 30, 2025  
Principal notes   $ 10,050  
Capital Notes 4% Due 1/24/2022 [Member]      
Debt Instrument [Line Items]      
Capital notes, interest rate 4.00%    
Proceeds used to pay off debt $ 5,000