REAL ESTATE AND OTHER SECURITIES - Summary of Real Estate Securities in an Unrealized Loss Position - Associated Intent to Sell (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Securities New Residential intends to sell
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 0	$ 0
Amortized Cost Basis After Credit Impairment	0	0
Gross Unrealized Credit Losses	0	0
Gross Unrealized Non-Credit Losses	0	0
Securities New Residential is more likely than not to be required to sell
Debt Securities, Available-for-sale [Line Items]
Fair Value	0	0
Amortized Cost Basis After Credit Impairment	0	0
Gross Unrealized Credit Losses	0	0
Gross Unrealized Non-Credit Losses	0	0
Securities No Intent To Sell - Credit Impaired
Debt Securities, Available-for-sale [Line Items]
Fair Value	6,581	21,326
Amortized Cost Basis After Credit Impairment	6,581	21,326
Gross Unrealized Credit Losses	(3,471)	(8,672)
Gross Unrealized Non-Credit Losses	0	0
Securities No Intent To Sell - Non-Credit
Debt Securities, Available-for-sale [Line Items]
Fair Value	3,927	270,821
Amortized Cost Basis After Credit Impairment	4,044	331,638
Gross Unrealized Credit Losses	0	0
Gross Unrealized Non-Credit Losses	(117)	(60,817)
Securities in an Unrealized Loss Position
Debt Securities, Available-for-sale [Line Items]
Fair Value	10,508	292,147
Amortized Cost Basis After Credit Impairment	10,625	352,964
Gross Unrealized Credit Losses	(3,471)	(8,672)
Gross Unrealized Non-Credit Losses	$ (117)	$ (60,817)