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Derivative Financial Instruments - Net Gains and Losses Recognized in Income, Fair Value Hedges (Details) - Fair value hedges - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Interest rate swaps | Loans and lease financing      
Gains and losses related to derivatives      
Recognized on interest rate swap $ (594) $ (671)  
Interest rate swaps | Noninterest income, Other      
Gains and losses related to derivatives      
Recognized on interest rate swap     $ 629
Hedged item | Loans and lease financing      
Gains and losses related to derivatives      
Recognized on hedged item $ 470 $ 735  
Hedged item | Noninterest income, Other      
Gains and losses related to derivatives      
Recognized on hedged item     $ (723)