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DEBT OBLIGATIONS - Servicing Advance Facilities (Details) - Other secured financings - USD ($) $ in Millions	Sep. 30, 2025	Sep. 30, 2020
2020-VF1 Notes \| Advance Receivables Trust
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 100.0
2020-VF1 Notes \| Advance Receivables Trust \| Reimbursement For Advances Made
Debt Instrument [Line Items]
Outstanding balance	$ 23.0
Advances to affiliate	27.1
GMSR VFN \| Servicing Advance Reimbursement Amounts
Debt Instrument [Line Items]
Outstanding balance	30.4
Advances to affiliate	$ 44.6