MORTGAGE SERVICING RIGHTS AND MSR FINANCING RECEIVABLES (AS RESTATED) - Schedule of Components of Servicing Revenue, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Servicing Asset at Amortized Cost [Line Items]
Contractually Specified Servicing Fee Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Ancillary Fee Income, Servicing Financial Asset, Statement of Income or Comprehensive Income [Extensible Enumeration]	Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Change in valuation inputs and assumptions, net of realized gains (losses)	$ (201,014)
MSRs
Servicing Asset at Amortized Cost [Line Items]
Servicing fee revenue, net and interest income from MSRs and MSR financing receivables	430,114	$ 439,050
Ancillary and other fees	39,777	30,607
Servicing fee revenue, net and fees	469,891	469,657
Realization of cash flows	(116,839)	(105,691)
Change in valuation inputs and assumptions, net of realized gains (losses)	201,014	(36,613)
Servicing revenue, net	$ 554,066	$ 327,353