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Deposits - Schedule of Interest Expense on Deposit Liabilities (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Deposits      
Checking and savings accounts $ 7,096 $ 7,971 $ 5,982
Certificate accounts 25,453 37,723 22,149
Early withdrawal penalties (118) (124) (174)
Total interest expense on deposits $ 32,431 $ 45,570 $ 27,957