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Commitments and Contingent Liabilities (Details) - Commitments and Unused Lines of Credit - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Fixed Rate    
The contractual amounts of financial instruments with off-balance-sheet risk at year end    
Total contractual amounts of financial instruments with off-balance-sheet risk $ 85,558 $ 86,952
Variable Rate    
The contractual amounts of financial instruments with off-balance-sheet risk at year end    
Total contractual amounts of financial instruments with off-balance-sheet risk $ 286,876 $ 287,551