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FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Jan. 13, 2021
Aug. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Proceeds from the sale of businesses     $ 3,307 $ 38,632 $ 15,000
Ocwen | Revenue | Customer Concentration Risk          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Concentration risk     54.00% 56.00% 52.00%
Altisource Residential Corporation          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Number of securities outstanding (in shares)     0 3,500,000  
Discontinued Operations, Disposed of by Sale | Rental Property Management Business          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Future proceeds from the sale of business   $ 3,000      
Proceeds from the sale of businesses   $ 15,000      
Discontinued Operations, Disposed of by Sale | Rental Property Management Business | Subsequent Event          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Proceeds from the sale of businesses $ 3,000