XML 106 R96.htm IDEA: XBRL DOCUMENT
v3.22.1

Real Estate Securities - Summary of Significant Valuation Assumptions for Available for Sale Securities Credit Loss (Details) - Subordinate Securities | 3 Months Ended
--- | ---
Mar. 31, 2022
Debt Securities, Available-for-sale [Line Items] |
Default rate | 0.70%
Loss severity | 20.00%

X
- Definition Debt Securities, Available-for-sale, Allowance for Credit Loss, Qualitative Disclosures, Default Rate + References No definition available. + Details
Name: | rwt_DebtSecuritiesAvailableforsaleAllowanceforCreditLossQualitativeDisclosuresDefaultRate
Namespace Prefix: | rwt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Securities, Available-for-sale, Allowance for Credit Loss, Qualitative Disclosures, Severity + References No definition available. + Details
Name: | rwt_DebtSecuritiesAvailableforsaleAllowanceforCreditLossQualitativeDisclosuresSeverity
Namespace Prefix: | rwt_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=rwt_SubordinateSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |