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Residential Loans, at Fair Value - Statement of Operations of Consolidated SLST (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Schedule of Investments [Line Items]
Interest expense	$ 19,444	$ 141,567	$ 182,976	$ 263,344
NET INTEREST INCOME	28,526	25,691	75,607	51,896
Unrealized gains (losses), net	102,872	$ 78	(293,908)	$ 2,786
Consolidated SLST | VIE, Primary Beneficiary
Schedule of Investments [Line Items]
Interest income	11,522		23,646
Interest expense	8,158		16,693
NET INTEREST INCOME	3,364		6,953
Unrealized gains (losses), net	4,096		(62,038)
Net loss	(7,460)		55,085
Consolidated SLST | VIE, Primary Beneficiary
Schedule of Investments [Line Items]
Unrealized gains (losses), net	71,000		49,000
Unrealized gains (losses) held	$ 75,051		$ (13,049)

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