Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES - Narrative (Details)

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COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Loss Contingencies [Line Items]        
Estimated liability, representation and warranties $ 36.8   $ 36.8  
Residential mortgage loan repurchase liability 1,800.0   1,800.0  
Rent expense, net of sublease income 7.0 $ 3.4 14.0 $ 10.5
Sublease rentals 1.6   1.6  
Unfunded Loan Commitment | Consumer Portfolio Segment | Consumer Loan SPVs        
Loss Contingencies [Line Items]        
Financing receivable $ 250.1   $ 250.1