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Subsequent Events (Details) - USD ($)		1 Months Ended	3 Months Ended
		May 13, 2020	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2020	Dec. 31, 2019
Subsequent Event [Line Items]
Associated borrowings repaid			$ 2,960,444,000	$ 1,459,648,000
Short-term debt	[1]		2,341,648,000			$ 2,329,145,000
Short-term debt facilities
Subsequent Event [Line Items]
Short-term debt			2,082,717,000			2,176,591,000
Residential loan warehouse | Short-term debt facilities
Subsequent Event [Line Items]
Short-term debt			$ 841,186,000			$ 185,894,000
Residential loan warehouse | Short-term debt facilities | Forecast
Subsequent Event [Line Items]
Short-term debt					$ 145,000,000
Subsequent Event
Subsequent Event [Line Items]
Proceeds from sale of residential mortgage loans		$ 1,800,000,000
Associated borrowings repaid		1,500,000,000
Principal balance of residential mortgage loans sold		$ 203,000,000
Subsequent Event | Forecast
Subsequent Event [Line Items]
Federal home loan bank advances outstanding					$ 0
[1] Our consolidated balance sheets include assets of consolidated variable interest entities (“VIEs”) that can only be used to settle obligations of these VIEs and liabilities of consolidated VIEs for which creditors do not have recourse to Redwood Trust, Inc. or its affiliates. At March 31, 2020 and December 31, 2019, assets of consolidated VIEs totaled $7,470,706 and $11,931,869, respectively. At March 31, 2020 and December 31, 2019, liabilities of consolidated VIEs totaled $6,759,260 and $10,717,072, respectively. See Note 4 for further discussion.

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