Residential Loans, at Fair Value - Statement of Operations of Consolidated SLST (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Schedule of Investments [Line Items]
Interest expense	$ 163,531	$ 121,779
NET INTEREST INCOME	47,082	26,203
Unrealized (losses) gains, net	(396,780)	$ 2,708
Consolidated SLST \| VIE, Primary Beneficiary
Schedule of Investments [Line Items]
Interest income	12,123
Interest expense	8,535
NET INTEREST INCOME	3,588
Unrealized (losses) gains, net	(66,134)
Net loss	62,546
Consolidated SLST \| VIE, Primary Beneficiary
Schedule of Investments [Line Items]
Unrealized (losses) gains, net	22,000
Unrealized losses held	$ (88,100)

Unrealized Gain (Loss) On Real Estate Mortgage Loans, Net

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Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest.

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The amount of interest income and other income recognized during the period. Included in this element is interest derived from investments in debt securities, cash and cash equivalents, and other investments which reflect the time value of money or transactions in which the payments are for the use or forbearance of money and other income from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business).

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Amount of the cost of borrowed funds accounted for as interest expense.

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The net amount of operating interest income (expense).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments, not including unrealized gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, held at each balance sheet date and included in earnings for the period.

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