XML 117 R100.htm IDEA: XBRL DOCUMENT v3.22.2.2

Real Estate Securities - Summary of Significant Valuation Assumptions for Available for Sale Securities Credit Loss (Details) - Subordinate Securities	9 Months Ended
	Sep. 30, 2022
Debt Securities, Available-for-sale [Line Items]
Default rate	0.80%
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: