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Mortgage Servicing Rights - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Transfers and Servicing of Financial Assets [Abstract]          
Residential mortgage loans serviced for third parties $ 2,600.0   $ 2,600.0   $ 2,600.0
Servicing income, including late and ancillary fees $ 1.4 $ 1.5 $ 4.2 $ 4.5