XML 126 R112.htm IDEA: XBRL DOCUMENT v3.19.2

Asset-Backed Securities Issued - Additional Information (Details)	6 Months Ended
	Jun. 30, 2019
Asset-backed securities issued | Contractual maturities of over five years
Debt Instrument [Line Items]
Contractual maturities of securities (in years)	5 years

X

- Definition

Long Term Marketable Securities Maturities Term

+ References

No definition available.

+ Details

Name:	rwt_LongTermMarketableSecuritiesMaturitiesTerm
Namespace Prefix:	rwt_
Data Type:	xbrli:durationItemType
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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=rwt_MaturityOverFiveYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: