INVESTMENTS IN EXCESS MORTGAGE SERVICING RIGHTS ASSETS - Summary of Financial Results of Excess MSR Joint Ventures (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Schedule of Investments in Mortgage Servicing Rights [Line Items]
Equity	$ 5,428,631	$ 7,262,117	$ 5,428,631	$ 7,262,117	$ 5,388,972	$ 7,236,260	$ 6,800,830	$ 6,088,295
New Residential’s investment	4,781,624		4,781,624			5,686,233
Net income (loss)	103,920	244,660	(1,459,206)	375,552
Excess MSRs Investees
Schedule of Investments in Mortgage Servicing Rights [Line Items]
Excess MSR assets	190,246		190,246			226,843
Other assets	25,158		25,158			25,035
New Residential’s investment	$ 107,359		$ 107,359			$ 125,596
New Residential’s ownership	50.00%		50.00%			50.00%
Interest income	$ 12,249	7,990	$ 20,099	12,251
Other income (loss)	(13,027)	1,528	(25,879)	(4,029)
Expenses	(8)	(16)	(24)	(48)
Excess MSRs Investees | Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Schedule of Investments in Mortgage Servicing Rights [Line Items]
Other liabilities	(687)		(687)			$ (687)
Equity	214,717		214,717			$ 251,191
Net income (loss)	(786)	$ 9,502	(5,804)	$ 8,174
MSRs
Schedule of Investments in Mortgage Servicing Rights [Line Items]
New Residential’s investment	$ 3,651,805		$ 3,651,805