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Segment Information - Supplemental Information by Segment (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Segment Reporting Information [Line Items] |  |  |
Real estate securities | [1] | $ 1,099,874 | $ 1,452,494
Other investments | [1] | 358,130 | 438,518
Goodwill |  | 161,464 |
Total Assets | [1] | 17,995,440 | 11,937,406
Residential loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 7,714,850 | 7,254,742
Business purpose residential loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 3,506,743 | 141,258
Multifamily loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 4,408,524 | 2,144,598
Operating Segments | Residential Lending |  |  |
Segment Reporting Information [Line Items] |  |  |
Real estate securities |  | 229,074 | 364,308
Other investments |  | 42,224 | 99,984
Goodwill |  | 0 |
Total Assets |  | 5,410,540 | 6,186,889
Operating Segments | Residential Lending | Residential loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 4,939,745 | 5,512,116
Operating Segments | Residential Lending | Business purpose residential loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 0 | 0
Operating Segments | Residential Lending | Multifamily loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 0 | 0
Operating Segments | Business Purpose Lending |  |  |
Segment Reporting Information [Line Items] |  |  |
Real estate securities |  | 0 | 0
Other investments |  | 21,002 | 10,754
Goodwill |  | 161,464 |
Total Assets |  | 3,786,641 | 160,950
Operating Segments | Business Purpose Lending | Residential loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 0 | 0
Operating Segments | Business Purpose Lending | Business purpose residential loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 3,506,743 | 141,258
Operating Segments | Business Purpose Lending | Multifamily loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 0 | 0
Operating Segments | Multifamily Investments |  |  |
Segment Reporting Information [Line Items] |  |  |
Real estate securities |  | 404,128 | 429,079
Other investments |  | 61,018 | 15,092
Goodwill |  | 0 |
Total Assets |  | 4,889,330 | 2,600,150
Operating Segments | Multifamily Investments | Residential loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 0 | 0
Operating Segments | Multifamily Investments | Business purpose residential loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 0 | 0
Operating Segments | Multifamily Investments | Multifamily loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 4,408,524 | 2,144,598
Operating Segments | Third-Party Residential Investments |  |  |
Segment Reporting Information [Line Items] |  |  |
Real estate securities |  | 466,672 | 659,107
Other investments |  | 233,886 | 312,688
Goodwill |  | 0 |
Total Assets |  | 3,139,616 | 2,232,276
Operating Segments | Third-Party Residential Investments | Residential loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 2,367,215 | 1,222,668
Operating Segments | Third-Party Residential Investments | Business purpose residential loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 0 | 0
Operating Segments | Third-Party Residential Investments | Multifamily loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 0 | 0
Corporate/ Other |  |  |
Segment Reporting Information [Line Items] |  |  |
Real estate securities |  | 0 | 0
Other investments |  | 0 | 0
Goodwill |  | 0 |
Total Assets |  | 769,313 | 757,141
Corporate/ Other | Residential loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 407,890 | 519,958
Corporate/ Other | Business purpose residential loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | 0 | 0
Corporate/ Other | Multifamily loans |  |  |
Segment Reporting Information [Line Items] |  |  |
Loans, at fair value |  | $ 0 | $ 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 December 31, 2019 and December 31, 2018, assets of consolidated VIEs totaled $11,931,869 and $6,331,191, respectively. At December 31, 2019 and December 31, 2018, liabilities of consolidated VIEs totaled $10,717,072 and $5,709,807, respectively. See Note 4 for further discussion.

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