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Loan Servicing - Summary of Activity for Mortgage Servicing Rights of Acquisition (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Servicing rights:      
Beginning balance $ 3,198 $ 1,721 $ 1,468
Additions 1,556 2,429 813
Amortization to expense (1,351) (952) (560)
Ending balance $ 3,403 $ 3,198 $ 1,721