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Borrowed Funds (Contractual Maturities of Long-term Borrowings) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Due in 2021 $ 5,000 $ 20,000
Due in 2023 15,000 30,000
Due in 2024   20,000
Due in 2025 30,000  
Thereafter 50,929 30,929
Total long-term debt 100,929 $ 100,929
Fixed Rate [Member]    
Debt Instrument [Line Items]    
Due in 2021 5,000  
Due in 2023 15,000  
Due in 2025 30,000  
Thereafter 20,000  
Total long-term debt 70,000  
Floating Rate [Member]    
Debt Instrument [Line Items]    
Thereafter 30,929  
Total long-term debt $ 30,929