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OTHER ASSETS - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Servicing Asset at Amortized Cost [Line Items]      
Contractually Specified Servicing Fee Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Non-interest income Non-interest income  
Capitalized servicing rights $ 16.7 $ 16.6  
Continuing Operations      
Servicing Asset at Amortized Cost [Line Items]      
Mortgage loans sold and serviced for others 1,500.0 1,600.0 $ 1,500.0
Servicing fees $ 5.5 $ 8.0 5.5
Discontinued Operations      
Servicing Asset at Amortized Cost [Line Items]      
Mortgage loans sold and serviced for others     600.0
Servicing fees     $ 2.1