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Short-Term Debt - Remaining Maturities of Short Term Debt (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Short-term Debt [Line Items]
Short-term debt	[1]	$ 1,750,941	$ 522,609
Within 30 days
Short-term Debt [Line Items]
Short-term debt		43,800
31 to 90 days
Short-term Debt [Line Items]
Short-term debt		466,540
Over 90 days
Short-term Debt [Line Items]
Short-term debt		1,240,601
Facilities
Short-term Debt [Line Items]
Short-term debt		1,599,030	314,234
Facilities | Within 30 days
Short-term Debt [Line Items]
Short-term debt		43,800
Facilities | 31 to 90 days
Short-term Debt [Line Items]
Short-term debt		314,629
Facilities | Over 90 days
Short-term Debt [Line Items]
Short-term debt		1,240,601
Facilities | Held-for-sale residential loans
Short-term Debt [Line Items]
Short-term debt		1,335,464	137,269
Facilities | Held-for-sale residential loans | Within 30 days
Short-term Debt [Line Items]
Short-term debt		0
Facilities | Held-for-sale residential loans | 31 to 90 days
Short-term Debt [Line Items]
Short-term debt		278,663
Facilities | Held-for-sale residential loans | Over 90 days
Short-term Debt [Line Items]
Short-term debt		1,056,801
Facilities | Business purpose loans
Short-term Debt [Line Items]
Short-term debt		183,800
Facilities | Business purpose loans | Within 30 days
Short-term Debt [Line Items]
Short-term debt		0
Facilities | Business purpose loans | 31 to 90 days
Short-term Debt [Line Items]
Short-term debt		0
Facilities | Business purpose loans | Over 90 days
Short-term Debt [Line Items]
Short-term debt		183,800
Facilities | Real estate securities
Short-term Debt [Line Items]
Short-term debt		79,766
Facilities | Real estate securities | Within 30 days
Short-term Debt [Line Items]
Short-term debt		43,800
Facilities | Real estate securities | 31 to 90 days
Short-term Debt [Line Items]
Short-term debt		35,966
Facilities | Real estate securities | Over 90 days
Short-term Debt [Line Items]
Short-term debt		0
Servicer advance financing
Short-term Debt [Line Items]
Short-term debt		151,911	$ 208,375
Servicer advance financing | Within 30 days
Short-term Debt [Line Items]
Short-term debt		0
Servicer advance financing | 31 to 90 days
Short-term Debt [Line Items]
Short-term debt		151,911
Servicer advance financing | Over 90 days
Short-term Debt [Line Items]
Short-term debt		$ 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 September 30, 2021 and December 31, 2020, assets of consolidated VIEs totaled $9,358,317 and $8,141,069, respectively. At September 30, 2021 and December 31, 2020, liabilities of consolidated VIEs totaled $8,391,761 and $7,348,713, respectively. See Note 4 for further discussion.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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