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FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Aug. 08, 2018
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Revenue | Customer Concentration Risk | Ocwen            
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]            
Percentage of revenue from largest customer   48.00% 63.00% 57.00% 54.00%  
Discontinued Operations, Disposed of by Sale | Rental Property Management Business            
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]            
Future proceeds from the sale of business, second installment $ 3.0          
RESI            
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]            
Number of securities outstanding (in shares)   3.5   3.5   3.5