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Principles of Consolidation - Summary of Redwood's Interest in Third-Party Variable Interest Entity's (Details) - Real estate securities $ in Thousands	Dec. 31, 2018 USD ($)
Variable Interest Entity [Line Items]
Assets	$ 1,176,161
Residential
Variable Interest Entity [Line Items]
Assets	1,161,069
Senior IO Securities
Variable Interest Entity [Line Items]
Assets	185,107
Mezzanine
Variable Interest Entity [Line Items]
Assets	547,249
Subordinate Securities
Variable Interest Entity [Line Items]
Assets	428,713
Excess MSRs
Variable Interest Entity [Line Items]
Assets	$ 15,092

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- Definition

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.

+ References

No definition available.

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- Definition

Carrying amount of the assets in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), where the reporting entity is not the VIE's primary beneficiary.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph a
-URI http://asc.fasb.org/extlink&oid=108788376&loc=d3e5728-111685

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