XML 134 R137.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Components of Mortgage Banking Activities, Net (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Sequoia IO securities | $ (23,839)us-gaap_IncreaseDecreaseInTradingSecurities |  | $ 42,451 us-gaap_IncreaseDecreaseInTradingSecurities |  | $ (11,702)us-gaap_IncreaseDecreaseInTradingSecurities |
Risk management derivatives | (31,167)rwt_MortgageBankingActivitiesDerivativeInstrumentsNet |  | 51,162 rwt_MortgageBankingActivitiesDerivativeInstrumentsNet |  | (10,609)rwt_MortgageBankingActivitiesDerivativeInstrumentsNet |
Mortgage banking activities, net | 34,938 rwt_MortgageBankingActivitiesNet |  | 102,494 rwt_MortgageBankingActivitiesNet |  | 36,593 rwt_MortgageBankingActivitiesNet |
Mortgage Banking Activities |  |  |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Sequoia IO securities | (23,839)us-gaap_IncreaseDecreaseInTradingSecurities / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |  | 42,451 us-gaap_IncreaseDecreaseInTradingSecurities / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |  | (11,702)us-gaap_IncreaseDecreaseInTradingSecurities / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |
Loan purchase and forward sale commitments | 13,891 rwt_ForwardPurchaseCommitmentFairValueHedgeLiabilityAtFairValue / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |  | (399)rwt_ForwardPurchaseCommitmentFairValueHedgeLiabilityAtFairValue / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |  |  |
Mortgage banking activities, net | 34,938 rwt_MortgageBankingActivitiesNet / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |  | 102,494 rwt_MortgageBankingActivitiesNet / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |  | 36,593 rwt_MortgageBankingActivitiesNet / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |
Mortgage Banking Activities | Residential Mortgage Banking Activities |  |  |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Loans, at fair value | 51,256 us-gaap_FairValueOptionChangesInFairValueGainLoss1 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_ResidentialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |  | (10,493)us-gaap_FairValueOptionChangesInFairValueGainLoss1 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_ResidentialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |  | 37,762 us-gaap_FairValueOptionChangesInFairValueGainLoss1 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_ResidentialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |
Risk management derivatives | (23,277)rwt_MortgageBankingActivitiesDerivativeInstrumentsNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_ResidentialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember | [1] | 47,786 rwt_MortgageBankingActivitiesDerivativeInstrumentsNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_ResidentialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember | [1] | (10,609)rwt_MortgageBankingActivitiesDerivativeInstrumentsNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_ResidentialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember | [1]
Net gains on loans |  |  |  |  | 19,713 us-gaap_GainLossOnSalesOfLoansNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_ResidentialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |
Other | 3,467 us-gaap_FeesAndCommissionsOther / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_ResidentialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember | [2] | 47 us-gaap_FeesAndCommissionsOther / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_ResidentialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember | [2] | 274 us-gaap_FeesAndCommissionsOther / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_ResidentialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember | [2]
Mortgage banking activities, net | 21,498 rwt_MortgageBankingActivitiesNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_ResidentialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |  | 79,392 rwt_MortgageBankingActivitiesNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_ResidentialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |  | 35,438 rwt_MortgageBankingActivitiesNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_ResidentialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |
Mortgage Banking Activities | Commercial Mortgage Banking Activities |  |  |  |  |  |
Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |
Loans, at fair value | 20,789 us-gaap_FairValueOptionChangesInFairValueGainLoss1 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_CommercialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |  | 8,694 us-gaap_FairValueOptionChangesInFairValueGainLoss1 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_CommercialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |  |  |
Risk management derivatives | (7,890)rwt_MortgageBankingActivitiesDerivativeInstrumentsNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_CommercialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember | [2] | 3,376 rwt_MortgageBankingActivitiesDerivativeInstrumentsNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_CommercialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember | [2] |  |
Net gains on loans |  |  | 11,031 us-gaap_GainLossOnSalesOfLoansNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_CommercialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |  | 1,155 us-gaap_GainLossOnSalesOfLoansNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_CommercialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |
Other | 541 us-gaap_FeesAndCommissionsOther / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_CommercialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember | [2] | 1 us-gaap_FeesAndCommissionsOther / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_CommercialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember | [2] |  |
Mortgage banking activities, net | $ 13,440 rwt_MortgageBankingActivitiesNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_CommercialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |  | $ 23,102 rwt_MortgageBankingActivitiesNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_CommercialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |  | $ 1,155 rwt_MortgageBankingActivitiesNet / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = rwt_CommercialMortgageBankingActivitiesMember / us-gaap_InvestmentTypeAxis = rwt_MortgageBankingActivitiesMember |
[1] | Represents market valuation changes of derivatives that are used to manage risks associated with our accumulation of residential and commercial loans.
[2] | Amounts in this line item include other fee income and the provision for repurchase expenses, presented net.

X
- Definition Forward Purchase Commitment Fair Value Hedge Liability At Fair Value + References No definition available. + Details
Name: | rwt_ForwardPurchaseCommitmentFairValueHedgeLiabilityAtFairValue
Namespace Prefix: | rwt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The aggregate net change in market value for derivative instruments associated with mortgage banking activities. + References No definition available. + Details
Name: | rwt_MortgageBankingActivitiesDerivativeInstrumentsNet
Namespace Prefix: | rwt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net income attributable to mortgage banking activities. This includes market valuations related to residential and commercial loans, Sequoia IOs, and mortgage banking derivatives, as well as realized gains or losses associated with mortgage loan sales. + References No definition available. + Details
Name: | rwt_MortgageBankingActivitiesNet
Namespace Prefix: | rwt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 + Details
Name: | us-gaap_FairValueOptionChangesInFairValueGainLoss1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Fee and commission revenue earned from sources not otherwise specified in the existing taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 13 -Article 9 + Details
Name: | us-gaap_FeesAndCommissionsOther
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net gain (loss) resulting from a sale of loans, including adjustments to record loans classified as held-for-sale at the lower-of-cost-or-market and fair value adjustments to loan held for investment purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.3(a)) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 + Details
Name: | us-gaap_GainLossOnSalesOfLoansNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of increase (decrease) in the fair value of equity or debt securities classified as trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3444-108585 + Details
Name: | us-gaap_IncreaseDecreaseInTradingSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_MortgageLoansOnRealEstateLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=rwt_MortgageBankingActivitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |