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Short-Term Borrowings and Long-Term Debt (Schedule of Maturities of Long-term Debt) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
2022 $ 65  
2023 0  
2024 0  
2025 0  
2026 0  
Thereafter 12,166  
Long-term debt, total 12,231 $ 27,302
Fixed-Rate    
Debt Instrument [Line Items]    
2022 65  
2023 0  
2024 0  
2025 0  
2026 0  
Thereafter 166  
Long-term debt, total 231  
Fixed-Rate Convertible    
Debt Instrument [Line Items]    
2022 0  
2023 0  
2024 0  
2025 0  
2026 0  
Thereafter 12,000  
Long-term debt, total $ 12,000