XML 73 R89.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Residential Loans - Geographic Concentration of Residential Loans Recorded on Consolidated Balance Sheet (Details) - Residential loans, held-for-investment | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Concentration Risk [Line Items] |  |
Concentration risk percentage | 100.00% | 100.00%
California |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 36.00% | 40.00%
Washington |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 7.00% | 10.00%
Texas |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 6.00% | 6.00%
Colorado |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 6.00% |
Florida |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 4.00% | 4.00%
New Jersey |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 2.00% | 2.00%
New York |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 1.00% | 3.00%
Other states (none greater than 5%) |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 38.00% | 35.00%
Legacy Sequoia |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 100.00% | 100.00%
Legacy Sequoia | California |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 18.00% | 19.00%
Legacy Sequoia | Washington |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 1.00% | 1.00%
Legacy Sequoia | Texas |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 6.00% | 6.00%
Legacy Sequoia | Colorado |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 3.00% |
Legacy Sequoia | Florida |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 14.00% | 13.00%
Legacy Sequoia | New Jersey |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 4.00% | 4.00%
Legacy Sequoia | New York |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 10.00% | 10.00%
Legacy Sequoia | Other states (none greater than 5%) |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 44.00% | 47.00%
Sequoia Choice |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 100.00% | 100.00%
Sequoia Choice | California |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 35.00% | 39.00%
Sequoia Choice | Washington |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 7.00% | 7.00%
Sequoia Choice | Texas |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 9.00% | 8.00%
Sequoia Choice | Colorado |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 4.00% |
Sequoia Choice | Florida |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 5.00% | 4.00%
Sequoia Choice | New Jersey |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 2.00% | 1.00%
Sequoia Choice | New York |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 4.00% | 5.00%
Sequoia Choice | Other states (none greater than 5%) |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 34.00% | 36.00%
Freddie Mac SLST |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 100.00% | 100.00%
Freddie Mac SLST | California |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 14.00% | 12.00%
Freddie Mac SLST | Washington |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 2.00% | 2.00%
Freddie Mac SLST | Texas |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 3.00% | 3.00%
Freddie Mac SLST | Colorado |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 0.00% |
Freddie Mac SLST | Florida |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 10.00% | 10.00%
Freddie Mac SLST | New Jersey |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 7.00% | 7.00%
Freddie Mac SLST | New York |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 10.00% | 10.00%
Freddie Mac SLST | Other states (none greater than 5%) |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 54.00% | 56.00%
Redwood |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 100.00% | 100.00%
Redwood | California |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 45.00% | 47.00%
Redwood | Washington |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 5.00% | 5.00%
Redwood | Texas |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 8.00% | 8.00%
Redwood | Colorado |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 4.00% |
Redwood | Florida |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 5.00% | 5.00%
Redwood | New Jersey |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 2.00% | 1.00%
Redwood | New York |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 4.00% | 3.00%
Redwood | Other states (none greater than 5%) |  |
Concentration Risk [Line Items] |  |
Concentration risk percentage | 27.00% | 31.00%

X
- 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. + Details
Name: | us-gaap_ConcentrationRiskLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13531-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=rwt_ResidentialLoansHeldForInvestmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=stpr_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=stpr_WA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=stpr_TX
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=stpr_CO
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=stpr_FL
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=stpr_NJ
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=stpr_NY
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=rwt_OtherStateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=rwt_LegacySequoiaSecuritizationEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=rwt_SequoiaChoiceSecuritizationEntitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=rwt_FreddieMacSLSTMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_ParentCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |