XML 94 R82.htm IDEA: XBRL DOCUMENT v3.5.0.2

Real Estate Securities - Available for Sale Securities by Collateral Type (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Investment Holdings [Line Items]
Available-for-sale securities	$ 610,270	$ 829,245
Senior Securities
Investment Holdings [Line Items]
Available-for-sale securities	73,324	279,251
Senior Securities | Prime
Investment Holdings [Line Items]
Available-for-sale securities	65,195	210,993
Senior Securities | Non-prime
Investment Holdings [Line Items]
Available-for-sale securities	8,129	68,258
Re-REMIC
Investment Holdings [Line Items]
Available-for-sale securities	165,707	165,064
Subordinate Securities
Investment Holdings [Line Items]
Available-for-sale securities	371,239	384,930
Subordinate Securities | Prime mezzanine
Investment Holdings [Line Items]
Available-for-sale securities	202,268	224,624
Subordinate Securities | Prime subordinate
Investment Holdings [Line Items]
Available-for-sale securities	$ 168,971	$ 160,306

X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26610-111562

+ Details

Name:	us-gaap_AvailableForSaleSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

X

- Details

Name:	us-gaap_InvestmentTypeAxis=rwt_SeniorSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesClassAxis=rwt_RealEstateSecuritiesPrimeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesClassAxis=rwt_RealEstateSecuritiesSubprimeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=rwt_ResecuritizationOfRealEstateMortgageInvestmentSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=rwt_SubordinateSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesClassAxis=rwt_RealEstateSecuritiesPrimeMezzanineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	invest_InvestmentSecuritiesClassAxis=rwt_RealEstateSecuritiesPrimeSubordinateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: