XML 142 R130.htm IDEA: XBRL DOCUMENT v2.4.0.8

Subsequent Events - Additional Information (Detail) (Residential Loans, USD $)		1 Months Ended
	Sep. 30, 2014	Nov. 02, 2014 Subsequent Event
Subsequent Event [Line Items]
Amount of loans planned to be purchased	$ 1,300,000,000
Residential mortgage loans closed and purchased		$ 597,000,000

X

- Definition

Amount of Loans Expected to be Purchased

+ References

No definition available.

+ Details

Name:	rwt_AmountOfLoansExpectedToBePurchased
Namespace Prefix:	rwt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The cash outflow used to purchase loans that are secured with real estate mortgage and are held with the intention to resell in the near future.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 21

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3461-108585



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 230

-Section 55

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=34726456&loc=d3e60097-112785



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3367-108585

+ Details

Name:	us-gaap_PaymentsToPurchaseMortgageLoansHeldForSale
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration