Annual report pursuant to Section 13 and 15(d)

REAL ESTATE AND OTHER SECURITIES - Summary of Real Estate Securities in an Unrealized Loss Position - Associated Intent to Sell (Details)

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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, 2020
Dec. 31, 2019
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
Securities No Intent To Sell - Credit Impaired    
Debt Securities, Available-for-sale [Line Items]    
Fair Value 21,326 228,228
Amortized Cost Basis After Credit Impairment 21,326 237,626
Gross Unrealized Credit Losses (8,672) (3,232)
Gross Unrealized Non-Credit Losses 0 (9,398)
Securities No Intent To Sell - Non-Credit    
Debt Securities, Available-for-sale [Line Items]    
Fair Value 270,821 4,726,409
Amortized Cost Basis After Credit Impairment 331,638 4,767,837
Gross Unrealized Credit Losses 0 0
Gross Unrealized Non-Credit Losses (60,817) (41,428)
Securities in an Unrealized Loss Position    
Debt Securities, Available-for-sale [Line Items]    
Fair Value 292,147 4,954,637
Amortized Cost Basis After Credit Impairment 352,964 5,005,463
Gross Unrealized Credit Losses (8,672) (3,232)
Gross Unrealized Non-Credit Losses $ (60,817) $ (50,826)