XML 113 R122.htm IDEA: XBRL DOCUMENT v2.4.1.9

Summary of Carrying Value Components of Collateral for Asset-Backed Securities Issued and Outstanding (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	$ 1,900,208rwt_CollateralForAssetBackedSecuritiesIssued	$ 2,292,378rwt_CollateralForAssetBackedSecuritiesIssued
Residential Loans
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	1,474,386rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_ResidentialLoansMember	1,762,167rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_ResidentialLoansMember
Commercial Loans
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	194,991rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_CommercialLoanMember	257,741rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_CommercialLoanMember
Real Estate Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	221,676rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_RealEstateInvestmentMember	263,204rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_RealEstateInvestmentMember
Restricted Cash
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	327rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember	289rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember
Accrued Interest Receivable
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	4,347rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_InterestReceivableMember	5,316rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_InterestReceivableMember
REO
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	4,481rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_OtherRealEstateOwnedMember	3,661rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_OtherRealEstateOwnedMember
Sequoia
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	1,481,303rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_SequoiaSecuritizationEntitiesMember	1,768,694rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_SequoiaSecuritizationEntitiesMember
Sequoia | Residential Loans
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	1,474,386rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_ResidentialLoansMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_SequoiaSecuritizationEntitiesMember	1,762,167rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_ResidentialLoansMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_SequoiaSecuritizationEntitiesMember
Sequoia | Restricted Cash
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	147rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_SequoiaSecuritizationEntitiesMember	152rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_SequoiaSecuritizationEntitiesMember
Sequoia | Accrued Interest Receivable
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	2,359rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_InterestReceivableMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_SequoiaSecuritizationEntitiesMember	2,714rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_InterestReceivableMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_SequoiaSecuritizationEntitiesMember
Sequoia | REO
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	4,411rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_OtherRealEstateOwnedMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_SequoiaSecuritizationEntitiesMember	3,661rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_OtherRealEstateOwnedMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_SequoiaSecuritizationEntitiesMember
Residential Resecuritization
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	222,196rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_ResecuritizationMember	263,831rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_ResecuritizationMember
Residential Resecuritization | Real Estate Securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	221,676rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_RealEstateInvestmentMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_ResecuritizationMember	263,204rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_RealEstateInvestmentMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_ResecuritizationMember
Residential Resecuritization | Restricted Cash
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	43rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_ResecuritizationMember
Residential Resecuritization | Accrued Interest Receivable
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	477rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_InterestReceivableMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_ResecuritizationMember	627rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_InterestReceivableMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_ResecuritizationMember
Commercial Securitization
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	196,709rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_CommercialSecuritizationEntityMember	259,853rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_CommercialSecuritizationEntityMember
Commercial Securitization | Commercial Loans
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	194,991rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_CommercialLoanMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_CommercialSecuritizationEntityMember	257,741rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_CommercialLoanMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_CommercialSecuritizationEntityMember
Commercial Securitization | Restricted Cash
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	137rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_CommercialSecuritizationEntityMember	137rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_CommercialSecuritizationEntityMember
Commercial Securitization | Accrued Interest Receivable
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	1,511rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_InterestReceivableMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_CommercialSecuritizationEntityMember	1,975rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_InterestReceivableMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_CommercialSecuritizationEntityMember
Commercial Securitization | REO
Financial Instruments Owned and Pledged as Collateral [Line Items]
Collateral for ABS Issued	$ 70rwt_CollateralForAssetBackedSecuritiesIssued / us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis = rwt_OtherRealEstateOwnedMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = rwt_CommercialSecuritizationEntityMember

X

- Definition

The carrying value of collateral as of the balance sheet date for the asset-backed securities issued.

+ References

No definition available.

+ Details

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

X

- Details

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

X

- Details

Name:	us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis=rwt_InterestReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis=rwt_OtherRealEstateOwnedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis=rwt_ResidentialLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis=us-gaap_CommercialLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis=us-gaap_RealEstateInvestmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAxis=us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=rwt_CommercialSecuritizationEntityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=rwt_ResecuritizationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=rwt_SequoiaSecuritizationEntitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: