INVESTMENTS IN REAL ESTATE SECURITIES - Summary of Real Estate Securities in an Unrealized Loss Position - Associated Intent to Sell (Details)	9 Months Ended
	Sep. 30, 2017 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses reflected in other comprehensive income	$ 0
Securities New Residential intends to sell
Schedule of Available-for-sale Securities [Line Items]
Fair Value	0
Amortized Cost Basis After Impairment	0
Unrealized Credit Losses	0
Unrealized Non-Credit Losses	0
Securities New Residential is more likely than not to be required to sell
Schedule of Available-for-sale Securities [Line Items]
Fair Value	0
Amortized Cost Basis After Impairment	0
Unrealized Credit Losses	0
Credit impaired securities
Schedule of Available-for-sale Securities [Line Items]
Fair Value	373,046,000
Amortized Cost Basis After Impairment	378,585,000
Unrealized Credit Losses	(1,509,000)
Unrealized Non-Credit Losses	(5,539,000)
Non-credit impaired securities
Schedule of Available-for-sale Securities [Line Items]
Fair Value	1,270,511,000
Amortized Cost Basis After Impairment	1,295,855,000
Unrealized Credit Losses	0
Unrealized Non-Credit Losses	(25,344,000)
Total debt securities in an unrealized loss position
Schedule of Available-for-sale Securities [Line Items]
Fair Value	1,643,557,000
Amortized Cost Basis After Impairment	1,674,440,000
Unrealized Credit Losses	(1,509,000)
Unrealized Non-Credit Losses	$ (30,883,000)