XML 122 R105.htm IDEA: XBRL DOCUMENT v2.4.1.9

Long-Term Debt - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		1 Months Ended	3 Months Ended
	Nov. 30, 2014	Mar. 31, 2015		Mar. 31, 2013	Mar. 31, 2014	Dec. 31, 2014
Debt Instrument [Line Items]
Federal home loan bank stock		$ 28,434,000us-gaap_FederalHomeLoanBankStock				$ 10,688,000us-gaap_FederalHomeLoanBankStock
Accrued interest payable		2,000,000us-gaap_InterestPayableCurrent				2,000,000us-gaap_InterestPayableCurrent
Accrued interest payable balance on long-term debt (less than)		14,319,000us-gaap_InterestPayableCurrentAndNoncurrent	[1]			8,503,000us-gaap_InterestPayableCurrentAndNoncurrent	[1]
Commercial Secured Borrowings
Debt Instrument [Line Items]
Commercial mortgage loans		68,000,000us-gaap_PledgedAssetsSeparatelyReportedMortgageRelatedSecuritiesAvailableForSaleOrHeldForInvestment / us-gaap_DebtInstrumentAxis = rwt_CommercialSecuredLoanMember
Exchangeable Senior Notes
Debt Instrument [Line Items]
Convertible notes	205,000,000us-gaap_ConvertibleNotesPayable / us-gaap_DebtInstrumentAxis = rwt_ExchangeableSeniorNotesMember
Debt Instrument interest rate	5.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = rwt_ExchangeableSeniorNotesMember
Debt instrument maturity year	2019
Debt instrument redemption date	Nov. 15, 2019
Net proceeds from issuance of convertible debt	198,000,000us-gaap_ProceedsFromDebtNetOfIssuanceCosts / us-gaap_DebtInstrumentAxis = rwt_ExchangeableSeniorNotesMember
Interest expense yield		6.52%us-gaap_DebtInstrumentInterestRateDuringPeriod / us-gaap_DebtInstrumentAxis = rwt_ExchangeableSeniorNotesMember
Accrued interest payable		4,000,000us-gaap_InterestPayableCurrent / us-gaap_DebtInstrumentAxis = rwt_ExchangeableSeniorNotesMember
Unamortized Debt Issuance Expense		7,000,000us-gaap_UnamortizedDebtIssuanceExpense / us-gaap_DebtInstrumentAxis = rwt_ExchangeableSeniorNotesMember
Convertible senior notes conversion rate		0.0461798us-gaap_DebtInstrumentConvertibleConversionRatio1 / us-gaap_DebtInstrumentAxis = rwt_ExchangeableSeniorNotesMember
Convertible senior notes conversion per share		$ 21.65us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = rwt_ExchangeableSeniorNotesMember
Senior Notes due 2018
Debt Instrument [Line Items]
Convertible notes				288,000,000us-gaap_ConvertibleNotesPayable / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember
Debt Instrument interest rate				4.625%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember
Net proceeds from issuance of convertible debt				279,000,000us-gaap_ProceedsFromDebtNetOfIssuanceCosts / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember
Interest expense yield		5.36%us-gaap_DebtInstrumentInterestRateDuringPeriod / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember
Accrued interest payable		7,000,000us-gaap_InterestPayableCurrent / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember
Unamortized Debt Issuance Expense		5,000,000us-gaap_UnamortizedDebtIssuanceExpense / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember
Convertible senior notes conversion rate		0.041132us-gaap_DebtInstrumentConvertibleConversionRatio1 / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember
Convertible senior notes conversion per share		$ 24.31us-gaap_DebtInstrumentConvertibleConversionPrice1 / us-gaap_DebtInstrumentAxis = us-gaap_SeniorNotesMember
Trust Preferred Securities
Debt Instrument [Line Items]
Interest expense yield		2.52%us-gaap_DebtInstrumentInterestRateDuringPeriod / us-gaap_DebtInstrumentAxis = rwt_TrustPreferredSecuritiesMember			2.42%us-gaap_DebtInstrumentInterestRateDuringPeriod / us-gaap_DebtInstrumentAxis = rwt_TrustPreferredSecuritiesMember
Debt instrument face amount		100,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = rwt_TrustPreferredSecuritiesMember
Percentage of yield of debt securities		(6.81%)rwt_DebtInstrumentInterestRateIncludingHedgingCostsAndAmortizationOfDebtIssuanceCosts / us-gaap_DebtInstrumentAxis = rwt_TrustPreferredSecuritiesMember			(6.78%)rwt_DebtInstrumentInterestRateIncludingHedgingCostsAndAmortizationOfDebtIssuanceCosts / us-gaap_DebtInstrumentAxis = rwt_TrustPreferredSecuritiesMember
Subordinated Notes
Debt Instrument [Line Items]
Interest expense yield		2.52%us-gaap_DebtInstrumentInterestRateDuringPeriod / us-gaap_DebtInstrumentAxis = us-gaap_SeniorSubordinatedNotesMember			2.45%us-gaap_DebtInstrumentInterestRateDuringPeriod / us-gaap_DebtInstrumentAxis = us-gaap_SeniorSubordinatedNotesMember
Debt instrument face amount		40,000,000us-gaap_DebtInstrumentFaceAmount / us-gaap_DebtInstrumentAxis = us-gaap_SeniorSubordinatedNotesMember
Percentage of yield of debt securities		(6.81%)rwt_DebtInstrumentInterestRateIncludingHedgingCostsAndAmortizationOfDebtIssuanceCosts / us-gaap_DebtInstrumentAxis = us-gaap_SeniorSubordinatedNotesMember			(6.78%)rwt_DebtInstrumentInterestRateIncludingHedgingCostsAndAmortizationOfDebtIssuanceCosts / us-gaap_DebtInstrumentAxis = us-gaap_SeniorSubordinatedNotesMember
Long-term Debt | Maximum
Debt Instrument [Line Items]
Accrued interest payable balance on long-term debt (less than)		1,000,000us-gaap_InterestPayableCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = us-gaap_LongTermDebtMember / us-gaap_RangeAxis = us-gaap_MaximumMember				0us-gaap_InterestPayableCurrentAndNoncurrent / us-gaap_DebtInstrumentAxis = us-gaap_LongTermDebtMember / us-gaap_RangeAxis = us-gaap_MaximumMember
FHLB Chicago
Debt Instrument [Line Items]
Federal home loan bank advances, reset period of basis margin		91 days
FHLB Chicago | Residential Loans Held For Investment at Fair Value
Debt Instrument [Line Items]
Amount on advances secured by residential mortgage loans		994,000,000us-gaap_LoansReceivableFairValueDisclosure / us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis = us-gaap_FederalHomeLoanBankOfChicagoMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_ResidentialLoansHeldForInvestmentAtFairValueMember
FHLB Member Subsidiary | FHLB Chicago
Debt Instrument [Line Items]
Additional borrowings from FHLBC		355,000,000us-gaap_ProceedsFromFederalHomeLoanBankAdvances / us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis = us-gaap_FederalHomeLoanBankOfChicagoMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Federal home loan bank advances outstanding		851,000,000us-gaap_FederalHomeLoanBankAdvancesLongTerm / us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis = us-gaap_FederalHomeLoanBankOfChicagoMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Weighted average interest rate		0.27%us-gaap_LongtermDebtWeightedAverageInterestRate / us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis = us-gaap_FederalHomeLoanBankOfChicagoMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Weighted average maturity		9 years 2 months 12 days
Federal home loan bank stock		$ 28,000,000us-gaap_FederalHomeLoanBankStock / us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis = us-gaap_FederalHomeLoanBankOfChicagoMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
[1] Our consolidated balance sheets include assets of consolidated variable interest entities (“VIEs”) that can only be used to settle obligations of these VIEs and liabilities of consolidated VIEs for which creditors do not have recourse to the primary beneficiary (Redwood Trust, Inc.). At March 31, 2015 and December 31, 2014, assets of consolidated VIEs totaled $1,716,563 and $1,900,208, respectively, and liabilities of consolidated VIEs totaled $1,354,298 and $1,546,490, respectively. See Note 4 for further discussion.

X

- Definition

The effective interest rate during the reporting period including hedging costs and DBIC amortization.

+ References

No definition available.

+ Details

Name:	rwt_DebtInstrumentInterestRateIncludingHedgingCostsAndAmortizationOfDebtIssuanceCosts
Namespace Prefix:	rwt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Debt Instrument, Interest Rate Margin Reset Period

+ References

No definition available.

+ Details

Name:	rwt_DebtInstrumentInterestRateMarginResetPeriod
Namespace Prefix:	rwt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Debt Instrument Maturity Year

+ References

No definition available.

+ Details

Name:	rwt_DebtInstrumentMaturityYear
Namespace Prefix:	rwt_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Debt Instrument Redemption Date

+ References

No definition available.

+ Details

Name:	rwt_DebtInstrumentRedemptionDate
Namespace Prefix:	rwt_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of a written promise to pay a note, initially due after one year or beyond the operating cycle if longer, which can be exchanged for a specified amount of one or more securities (typically common stock), at the option of the issuer or the holder.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20, 22

-Article 5

+ Details

Name:	us-gaap_ConvertibleNotesPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6928298&loc=SL6031898-161870

+ Details

Name:	us-gaap_DebtInstrumentConvertibleConversionPrice1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 6

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(5))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Conversion Rate

-URI http://asc.fasb.org/extlink&oid=6509012

+ Details

Name:	us-gaap_DebtInstrumentConvertibleConversionRatio1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The average effective interest rate during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

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

X

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6479118&loc=d3e64650-112822



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 470

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64702-112823

+ Details

Name:	us-gaap_FederalHomeLoanBankAdvancesLongTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 325

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6478792&loc=d3e63345-112809

+ Details

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

X

- Definition

Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5



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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Current Liabilities

-URI http://asc.fasb.org/extlink&oid=6509677



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6935-107765



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e7018-107765

+ Details

Name:	us-gaap_InterestPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of interest payable on debt, including, but not limited to, trade payables.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(5))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.15(a))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph a

-Article 7



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph 5

-Article 9

+ Details

Name:	us-gaap_InterestPayableCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Glossary Loan

-URI http://asc.fasb.org/extlink&oid=6517073

+ Details

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

X

- Definition

Weighted average interest rate of long-term debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_LongtermDebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The fair value, as of the date of each statement of financial position presented, of mortgage-related securities, classified as available for sale or held for investment, which are owned but transferred to serve as collateral for the payment of the related debt obligation, primarily a secured borrowing or repurchase agreement, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6467456&loc=d3e113888-111728

+ Details

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

X

- Definition

The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

+ References

No definition available.

+ Details

Name:	us-gaap_ProceedsFromDebtNetOfIssuanceCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of cash inflow from proceeds of Federal Home Loan Bank (FHLBank) advances.

+ References

No definition available.

+ Details

Name:	us-gaap_ProceedsFromFederalHomeLoanBankAdvances
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

X

- Details

Name:	dei_LegalEntityAxis=us-gaap_SubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankAxis=us-gaap_FederalHomeLoanBankOfChicagoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: