Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENT - Narrative (Details)

v3.19.2
FAIR VALUE MEASUREMENT - Narrative (Details)
$ in Millions
6 Months Ended
Sep. 20, 2018
Jun. 30, 2019
USD ($)
Jul. 03, 2018
USD ($)
earnout_payment
Fair Value, Measurements, Nonrecurring      
Schedule of Equity Method Investments [Line Items]      
Assets, fair value   $ 1,000.0  
Minimum      
Schedule of Equity Method Investments [Line Items]      
Broker price discount   10.00%  
Maximum      
Schedule of Equity Method Investments [Line Items]      
Broker price discount   25.00%  
Residential Mortgage Loans | Fair Value, Measurements, Nonrecurring      
Schedule of Equity Method Investments [Line Items]      
Assets, fair value   $ 955.3  
Real Estate Acquired in Satisfaction of Debt | Fair Value, Measurements, Nonrecurring      
Schedule of Equity Method Investments [Line Items]      
Assets, fair value   56.5  
Loans Held-for-sale and Held-for-investment      
Schedule of Equity Method Investments [Line Items]      
Asset fair value adjustment   1.5  
Real Estate Owned      
Schedule of Equity Method Investments [Line Items]      
Asset fair value adjustment   $ 1.5  
Mortgage Servicing Rights Financing Receivable      
Schedule of Equity Method Investments [Line Items]      
Discount rate   9.50%  
MSRs      
Schedule of Equity Method Investments [Line Items]      
Discount rate   8.00%  
MSRs | Excess MSRs Investees      
Schedule of Equity Method Investments [Line Items]      
Discount rate   8.30%  
London Interbank Offered Rate (LIBOR) | Mortgage Servicing Rights Financing Receivable      
Schedule of Equity Method Investments [Line Items]      
Variable interest rate spread   0.90%  
Shellpoint Acquisition      
Schedule of Equity Method Investments [Line Items]      
Cash earnout payments | earnout_payment     3
Contingent consideration     $ 60.0
Contingent consideration, discount rate 8.00%    
Shellpoint Acquisition | Maximum      
Schedule of Equity Method Investments [Line Items]      
Contingent consideration     $ 60.0