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SERVICING - Narrative (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Borrower Payments    
Servicing Liabilities at Fair Value [Line Items]    
Servicing liability $ 326.9 $ 198.8
Loan Purchase Commitments    
Servicing Liabilities at Fair Value [Line Items]    
Servicing liability $ 14.6 $ 13.8