Basis of Presentation - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jul. 01, 2022	Dec. 31, 2022	[1]	Dec. 31, 2021	[1]	Dec. 31, 2020
Allocated to:
Goodwill		$ 23,373		$ 0		$ 0
Riverbend
Purchase price:
Cash	$ 44,126
Provisional consideration payable	153
Total consideration	44,279
Allocated to:
Business purpose loans, at fair value	59,748
Other investments	2,443
Cash and cash equivalents	3,490
Other assets	12,982
Goodwill	23,373
Intangible assets	13,300
Total assets acquired	115,336
Short-term debt, net	67,423
Accrued expenses and other liabilities	3,634
Total liabilities assumed	71,057
Total net assets acquired	$ 44,279

[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 December 31, 2022 and 2021, assets of consolidated VIEs totaled $9,257,291 and $10,661,081, respectively. At December 31, 2022 and 2021, liabilities of consolidated VIEs totaled $8,270,276 and $9,619,347, respectively. See Note 4 for further discussion.