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Mortgage Servicing Rights - Additional Information (Details) - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Transfers and Servicing [Abstract]    
Unpaid principal balance of mortgage loans serviced for others, amount $ 495.8 $ 491.9
Fair value of servicing rights, weighted average discount rate 8.00% 8.10%
Fair value of servicing rights, weighted average constant prepayment rate 6.40% 6.30%