SERVICER ADVANCE INVESTMENTS - Schedule of Interest Income Related to Investments in Servicer Advances (Details) - Servicer Advance Investments - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Schedule of Equity Method Investments [Line Items]
Interest income, gross of amounts attributable to servicer compensation	$ 7,969	$ 3,544	$ 21,344	$ 17,505
Amounts attributable to base servicer compensation	(826)	(590)	(2,306)	(1,746)
Amounts attributable to incentive servicer compensation	(4,445)	(3,043)	(12,184)	(9,036)
Interest income (expense) from servicer advance investments	$ 2,698	$ (89)	$ 6,854	$ 6,723