FAIR VALUE MEASUREMENTS - Financial Assets Measured at Fair Value on a Recurring Basis using Level 3 Inputs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Non-Agency RMBS
Gain (loss) included in net income
Gain (loss) on settlement of investments, net	$ (1,600)	$ (9,900)
Excess MSRs in Equity Method Investees
Purchases, sales and repayments
New Residential’s percentage ownership	50.00%		50.00%
Recurring Basis | Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	$ 13,425,847
Transfers
Transfers from Level 3	(295,142)
Transfers to Level 3	(13,552)
Gain (loss) included in net income
Reversal for credit losses on securities	(711)
Change in fair value of excess MSRs	(2,630)
Change in fair value of excess MSRs, equity method investees	1,703
Included in servicing revenue	645,018
Servicer advance investments	(483)
Residential mortgage loans	(106,920)
Consumer loans	(13,733)
Mortgage loans receivable	5,542
Gain (loss) on settlement of investments, net	(30,644)
Other income (loss), net	(143,241)
Gains (losses) included in other comprehensive income	(16,524)
Interest income	26,735
Purchases, sales and repayments
Purchases, net	1,464,837
Proceeds from sales	(1,358,670)
Proceeds from repayments	(918,498)
Originations and other	996,628
Balance, ending	13,665,561
Recurring Basis | Level 3 | Servicer Advance Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	421,807
Transfers
Transfers from Level 3	0
Transfers to Level 3	0
Gain (loss) included in net income
Reversal for credit losses on securities	0
Change in fair value of excess MSRs	0
Change in fair value of excess MSRs, equity method investees	0
Included in servicing revenue	0
Servicer advance investments	(483)
Residential mortgage loans	0
Consumer loans	0
Mortgage loans receivable
Gain (loss) on settlement of investments, net	0
Other income (loss), net	0
Gains (losses) included in other comprehensive income	0
Interest income	4,156
Purchases, sales and repayments
Purchases, net	257,807
Proceeds from sales
Proceeds from repayments	(292,517)
Originations and other	0
Balance, ending	390,770
Recurring Basis | Level 3 | Excess MSRs
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	344,947
Transfers
Transfers from Level 3	0
Transfers to Level 3	0
Gain (loss) included in net income
Reversal for credit losses on securities	0
Change in fair value of excess MSRs	(2,630)
Change in fair value of excess MSRs, equity method investees	1,703
Included in servicing revenue	0
Servicer advance investments	0
Residential mortgage loans	0
Consumer loans	0
Mortgage loans receivable
Gain (loss) on settlement of investments, net	1
Other income (loss), net	0
Gains (losses) included in other comprehensive income	0
Interest income	13,016
Purchases, sales and repayments
Purchases, net	0
Proceeds from sales	(6)
Proceeds from repayments	(15,844)
Originations and other	0
Balance, ending	341,187
Recurring Basis | Level 3 | MSRs and MSR Financing Receivables
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	6,858,803
Transfers
Transfers from Level 3	0
Transfers to Level 3	0
Gain (loss) included in net income
Reversal for credit losses on securities	0
Change in fair value of excess MSRs	0
Change in fair value of excess MSRs, equity method investees	0
Included in servicing revenue	645,018
Servicer advance investments	0
Residential mortgage loans	0
Consumer loans	0
Mortgage loans receivable
Gain (loss) on settlement of investments, net	0
Other income (loss), net	0
Gains (losses) included in other comprehensive income	0
Interest income	0
Purchases, sales and repayments
Purchases, net	(48)
Proceeds from sales	(760)
Proceeds from repayments	0
Originations and other	461,452
Balance, ending	7,964,465
Recurring Basis | Level 3 | Non-Agency RMBS
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	951,942
Transfers
Transfers from Level 3	0
Transfers to Level 3	0
Gain (loss) included in net income
Reversal for credit losses on securities	(711)
Change in fair value of excess MSRs	0
Change in fair value of excess MSRs, equity method investees	0
Included in servicing revenue	0
Servicer advance investments	0
Residential mortgage loans	0
Consumer loans	0
Mortgage loans receivable
Gain (loss) on settlement of investments, net	(1,560)
Other income (loss), net	(14,343)
Gains (losses) included in other comprehensive income	(16,524)
Interest income	2,234
Purchases, sales and repayments
Purchases, net	115,720
Proceeds from sales	0
Proceeds from repayments	(59,588)
Originations and other	0
Balance, ending	977,170
Recurring Basis | Level 3 | Derivatives
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	111,778
Transfers
Transfers from Level 3	0
Transfers to Level 3	0
Gain (loss) included in net income
Reversal for credit losses on securities	0
Change in fair value of excess MSRs	0
Change in fair value of excess MSRs, equity method investees	0
Included in servicing revenue	0
Servicer advance investments	0
Residential mortgage loans	0
Consumer loans	0
Mortgage loans receivable
Gain (loss) on settlement of investments, net	0
Other income (loss), net	(127,685)
Gains (losses) included in other comprehensive income	0
Interest income	0
Purchases, sales and repayments
Purchases, net	0
Proceeds from sales	0
Proceeds from repayments	0
Originations and other	0
Balance, ending	(15,908)
Recurring Basis | Level 3 | Properties and Residential Mortgage Loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	2,423,337
Transfers
Transfers from Level 3	0
Transfers to Level 3	(13,552)
Gain (loss) included in net income
Reversal for credit losses on securities	0
Change in fair value of excess MSRs	0
Change in fair value of excess MSRs, equity method investees	0
Included in servicing revenue	0
Servicer advance investments	0
Residential mortgage loans	(106,920)
Consumer loans	0
Mortgage loans receivable
Gain (loss) on settlement of investments, net	0
Other income (loss), net	(627)
Gains (losses) included in other comprehensive income	0
Interest income	0
Purchases, sales and repayments
Purchases, net	1,084,195
Proceeds from sales	(1,357,904)
Proceeds from repayments	(93,111)
Originations and other	(45)
Balance, ending	1,935,373
Recurring Basis | Level 3 | Consumer Loans
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	507,291
Transfers
Transfers from Level 3	0
Transfers to Level 3	0
Gain (loss) included in net income
Reversal for credit losses on securities	0
Change in fair value of excess MSRs	0
Change in fair value of excess MSRs, equity method investees	0
Included in servicing revenue	0
Servicer advance investments	0
Residential mortgage loans	0
Consumer loans	(13,733)
Mortgage loans receivable
Gain (loss) on settlement of investments, net	0
Other income (loss), net	0
Gains (losses) included in other comprehensive income	0
Interest income	4,006
Purchases, sales and repayments
Purchases, net	7,163
Proceeds from sales	0
Proceeds from repayments	(42,672)
Originations and other	0
Balance, ending	462,055
Recurring Basis | Level 3 | Notes and Loans Receivable
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	290,180
Transfers
Transfers from Level 3	0
Transfers to Level 3	0
Gain (loss) included in net income
Reversal for credit losses on securities	0
Change in fair value of excess MSRs	0
Change in fair value of excess MSRs, equity method investees	0
Included in servicing revenue	0
Servicer advance investments	0
Residential mortgage loans	0
Consumer loans	0
Mortgage loans receivable
Gain (loss) on settlement of investments, net	0
Other income (loss), net	(586)
Gains (losses) included in other comprehensive income	0
Interest income	3,323
Purchases, sales and repayments
Purchases, net	0
Proceeds from sales	0
Proceeds from repayments	(57,741)
Originations and other	0
Balance, ending	235,176
Recurring Basis | Level 3 | Mortgage Loans Receivable
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning	1,515,762
Transfers
Transfers from Level 3	(295,142)
Transfers to Level 3	0
Gain (loss) included in net income
Reversal for credit losses on securities	0
Change in fair value of excess MSRs	0
Change in fair value of excess MSRs, equity method investees	0
Included in servicing revenue	0
Servicer advance investments	0
Residential mortgage loans	0
Consumer loans	0
Mortgage loans receivable	5,542
Gain (loss) on settlement of investments, net	(29,085)
Other income (loss), net
Gains (losses) included in other comprehensive income	0
Interest income
Purchases, sales and repayments
Purchases, net	0
Proceeds from sales	0
Proceeds from repayments	(357,025)
Originations and other	535,221
Balance, ending	$ 1,375,273