EXCESS MORTGAGE SERVICING RIGHTS - Summary of Excess MSRs Made Through Equity Method Investees (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of MSRs [Line Items]
Carrying Value	$ 6,858,803	$ 4,585,841	$ 5,686,233
Weighted Average Life (Years)	1 year 3 months 18 days
Excess MSRs Investees
Schedule of MSRs [Line Items]
New Residential Interest in Investees	50.00%
Carrying Value	$ 85,749	99,917
Excess MSRs Investees | Agency
Schedule of MSRs [Line Items]
New Residential Interest in Investees	50.00%
Excess MSRs Investees | Agency | Original and Recaptured Pools
Schedule of MSRs [Line Items]
Unpaid Principal Balance	$ 23,039,453	$ 28,453,512
Investee Interest in Excess MSR	66.70%	66.70%
New Residential Interest in Investees	50.00%	50.00%
Amortized Cost Basis	$ 112,840	$ 139,251
Carrying Value	$ 152,383	$ 179,762
Weighted Average Life (Years)	5 years 8 months 12 days	5 years 9 months 18 days