v3.25.2
FAIR VALUE MEASUREMENTS - Schedule of Non-Recurring Basis Assets (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Mortgage Servicing Rights            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Other assets $ 85.5 $ 84.8 $ 86.3 $ 78.0 $ 75.2 $ 71.8
Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Other assets 0.0   0.0      
Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Other assets 0.0   0.0      
Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Other assets 87.0   88.0      
Fair Value, Nonrecurring            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Collateral dependent loans 98.0   105.0      
Other real estate owned     2.0      
Fair Value, Nonrecurring | Mortgage Servicing Rights            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Other assets 1.0   1.0      
Fair Value, Nonrecurring | SBA-Guaranteed Loan Servicing            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Other assets 1.0   1.0      
Fair Value, Nonrecurring | Level 1            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Collateral dependent loans 0.0   0.0      
Other real estate owned     0.0      
Fair Value, Nonrecurring | Level 1 | Mortgage Servicing Rights            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Other assets 0.0   0.0      
Fair Value, Nonrecurring | Level 1 | SBA-Guaranteed Loan Servicing            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Other assets 0.0   0.0      
Fair Value, Nonrecurring | Level 2            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Collateral dependent loans 0.0   0.0      
Other real estate owned     0.0      
Fair Value, Nonrecurring | Level 2 | Mortgage Servicing Rights            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Other assets 0.0   0.0      
Fair Value, Nonrecurring | Level 2 | SBA-Guaranteed Loan Servicing            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Other assets 0.0   0.0      
Fair Value, Nonrecurring | Level 3            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Collateral dependent loans 98.0   105.0      
Other real estate owned     2.0      
Fair Value, Nonrecurring | Level 3 | Mortgage Servicing Rights            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Other assets 1.0   1.0      
Fair Value, Nonrecurring | Level 3 | SBA-Guaranteed Loan Servicing            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Other assets $ 1.0   $ 1.0