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v2.4.1.9

Segment Information - Financial Information by Segment (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Segment Reporting Information [Line Items] |  |  |  |
Interest income | $ 63,746 us-gaap_InterestAndDividendIncomeOperating |  | $ 55,476 us-gaap_InterestAndDividendIncomeOperating |
Interest expense | (23,961)us-gaap_InterestExpense |  | (19,060)us-gaap_InterestExpense |
Net Interest Income | 39,785 us-gaap_InterestIncomeExpenseNet |  | 36,416 us-gaap_InterestIncomeExpenseNet |
Provision for loan losses | (206)us-gaap_ProvisionForLoanLeaseAndOtherLosses |  | (1,284)us-gaap_ProvisionForLoanLeaseAndOtherLosses |
Mortgage banking activities | 1,923 rwt_MortgageBankingActivitiesNet |  | (231)rwt_MortgageBankingActivitiesNet |
MSR income (loss) | (10,924)rwt_MortgageServicingRightsIncomeIncludingMarketValuationChangesOfMSRs |  | 606 rwt_MortgageServicingRightsIncomeIncludingMarketValuationChangesOfMSRs |
Other market valuation adjustments | (1,145)rwt_OtherMarketValuationAdjustmentsNet | [1] | (6,138)rwt_OtherMarketValuationAdjustmentsNet | [1]
Realized gains, net | 4,306 us-gaap_RealizedInvestmentGainsLosses |  | 1,092 us-gaap_RealizedInvestmentGainsLosses |
Total noninterest income, net | (5,031)us-gaap_NoninterestIncome |  | (4,671)us-gaap_NoninterestIncome |
Direct operating expenses | (25,063)us-gaap_OperatingExpenses |  | (19,971)us-gaap_OperatingExpenses |
Other income (expense) | 809 us-gaap_OtherNonoperatingIncomeExpense |  |  |
(Provision for) benefit from income taxes | 5,316 us-gaap_IncomeTaxExpenseBenefit |  | 1,843 us-gaap_IncomeTaxExpenseBenefit |
Net Income | 14,801 us-gaap_NetIncomeLoss |  | 12,333 us-gaap_NetIncomeLoss |
Non-cash amortization expense | 8,762 us-gaap_AdjustmentForAmortization |  | 9,076 us-gaap_AdjustmentForAmortization |
Operating Segments | Residential Mortgage Banking |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Interest income | 15,795 us-gaap_InterestAndDividendIncomeOperating / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |  | 10,668 us-gaap_InterestAndDividendIncomeOperating / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |
Interest expense | (3,778)us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |  | (1,321)us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |
Net Interest Income | 12,017 us-gaap_InterestIncomeExpenseNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |  | 9,347 us-gaap_InterestIncomeExpenseNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |
Provision for loan losses | 0 us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |  | 0 us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |
Mortgage banking activities | 2,215 rwt_MortgageBankingActivitiesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |  | (1,064)rwt_MortgageBankingActivitiesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |
MSR income (loss) | 0 rwt_MortgageServicingRightsIncomeIncludingMarketValuationChangesOfMSRs / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |  | 0 rwt_MortgageServicingRightsIncomeIncludingMarketValuationChangesOfMSRs / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |
Other market valuation adjustments | 2 rwt_OtherMarketValuationAdjustmentsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |  | (2)rwt_OtherMarketValuationAdjustmentsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |
Realized gains, net | 0 us-gaap_RealizedInvestmentGainsLosses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |  | 0 us-gaap_RealizedInvestmentGainsLosses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |
Total noninterest income, net | 2,217 us-gaap_NoninterestIncome / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |  | (1,066)us-gaap_NoninterestIncome / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |
Direct operating expenses | (10,903)us-gaap_OperatingExpenses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |  | (7,094)us-gaap_OperatingExpenses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |
Other income (expense) | 0 us-gaap_OtherNonoperatingIncomeExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |  |  |
(Provision for) benefit from income taxes | 8 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |  | (165)us-gaap_IncomeTaxExpenseBenefit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |
Net Income | 3,339 us-gaap_NetIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |  | 1,022 us-gaap_NetIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |
Non-cash amortization expense | (46)us-gaap_AdjustmentForAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |  | (52)us-gaap_AdjustmentForAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialMortgageBankingMember |
Operating Segments | Residential Investments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Interest income | 30,012 us-gaap_InterestAndDividendIncomeOperating / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |  | 27,594 us-gaap_InterestAndDividendIncomeOperating / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |
Interest expense | (2,810)us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |  | (2,850)us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |
Net Interest Income | 27,202 us-gaap_InterestIncomeExpenseNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |  | 24,744 us-gaap_InterestIncomeExpenseNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |
Provision for loan losses | 0 us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |  | 0 us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |
Mortgage banking activities | 0 rwt_MortgageBankingActivitiesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |  | 0 rwt_MortgageBankingActivitiesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |
MSR income (loss) | (10,924)rwt_MortgageServicingRightsIncomeIncludingMarketValuationChangesOfMSRs / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |  | 606 rwt_MortgageServicingRightsIncomeIncludingMarketValuationChangesOfMSRs / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |
Other market valuation adjustments | (19)rwt_OtherMarketValuationAdjustmentsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |  | (5,957)rwt_OtherMarketValuationAdjustmentsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |
Realized gains, net | 4,306 us-gaap_RealizedInvestmentGainsLosses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |  | 987 us-gaap_RealizedInvestmentGainsLosses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |
Total noninterest income, net | (5,828)us-gaap_NoninterestIncome / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |  | (4,364)us-gaap_NoninterestIncome / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |
Direct operating expenses | (1,118)us-gaap_OperatingExpenses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |  | (1,095)us-gaap_OperatingExpenses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |
Other income (expense) | 809 us-gaap_OtherNonoperatingIncomeExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |  |  |
(Provision for) benefit from income taxes | 3,510 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |  | 1,527 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |
Net Income | 23,766 us-gaap_NetIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |  | 20,812 us-gaap_NetIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |
Non-cash amortization expense | 9,838 us-gaap_AdjustmentForAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |  | 11,247 us-gaap_AdjustmentForAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_ResidentialInvestmentsMember |
Operating Segments | Commercial Mortgage Banking and Investments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Interest income | 10,914 us-gaap_InterestAndDividendIncomeOperating / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |  | 10,384 us-gaap_InterestAndDividendIncomeOperating / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |
Interest expense | (3,489)us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |  | (3,303)us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |
Net Interest Income | 7,425 us-gaap_InterestIncomeExpenseNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |  | 7,081 us-gaap_InterestIncomeExpenseNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |
Provision for loan losses | (206)us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |  | (655)us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |
Mortgage banking activities | (292)rwt_MortgageBankingActivitiesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |  | 833 rwt_MortgageBankingActivitiesNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |
MSR income (loss) | 0 rwt_MortgageServicingRightsIncomeIncludingMarketValuationChangesOfMSRs / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |  | 0 rwt_MortgageServicingRightsIncomeIncludingMarketValuationChangesOfMSRs / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |
Other market valuation adjustments | 0 rwt_OtherMarketValuationAdjustmentsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |  | 0 rwt_OtherMarketValuationAdjustmentsNet / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |
Realized gains, net | 0 us-gaap_RealizedInvestmentGainsLosses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |  | 0 us-gaap_RealizedInvestmentGainsLosses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |
Total noninterest income, net | (292)us-gaap_NoninterestIncome / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |  | 833 us-gaap_NoninterestIncome / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |
Direct operating expenses | (3,482)us-gaap_OperatingExpenses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |  | (2,626)us-gaap_OperatingExpenses / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |
Other income (expense) | 0 us-gaap_OtherNonoperatingIncomeExpense / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |  |  |
(Provision for) benefit from income taxes | 853 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |  | 355 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |
Net Income | 4,298 us-gaap_NetIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |  | 4,988 us-gaap_NetIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |
Non-cash amortization expense | (49)us-gaap_AdjustmentForAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |  | (173)us-gaap_AdjustmentForAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = rwt_CommercialMortgageBankingAndInvestmentsMember |
Corporate/Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Interest income | 7,025 us-gaap_InterestAndDividendIncomeOperating / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |  | 6,830 us-gaap_InterestAndDividendIncomeOperating / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |
Interest expense | (13,884)us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |  | (11,586)us-gaap_InterestExpense / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |
Net Interest Income | (6,859)us-gaap_InterestIncomeExpenseNet / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |  | (4,756)us-gaap_InterestIncomeExpenseNet / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |
Provision for loan losses | 0 us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |  | (629)us-gaap_ProvisionForLoanLeaseAndOtherLosses / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |
Mortgage banking activities | 0 rwt_MortgageBankingActivitiesNet / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |  | 0 rwt_MortgageBankingActivitiesNet / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |
MSR income (loss) | 0 rwt_MortgageServicingRightsIncomeIncludingMarketValuationChangesOfMSRs / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |  | 0 rwt_MortgageServicingRightsIncomeIncludingMarketValuationChangesOfMSRs / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |
Other market valuation adjustments | (1,128)rwt_OtherMarketValuationAdjustmentsNet / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |  | (179)rwt_OtherMarketValuationAdjustmentsNet / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |
Realized gains, net | 0 us-gaap_RealizedInvestmentGainsLosses / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |  | 105 us-gaap_RealizedInvestmentGainsLosses / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |
Total noninterest income, net | (1,128)us-gaap_NoninterestIncome / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |  | (74)us-gaap_NoninterestIncome / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |
Direct operating expenses | (9,560)us-gaap_OperatingExpenses / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |  | (9,156)us-gaap_OperatingExpenses / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |
Other income (expense) | 0 us-gaap_OtherNonoperatingIncomeExpense / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |  |  |
(Provision for) benefit from income taxes | 945 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |  | 126 us-gaap_IncomeTaxExpenseBenefit / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |
Net Income | (16,602)us-gaap_NetIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |  | (14,489)us-gaap_NetIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |
Non-cash amortization expense | $ (981)us-gaap_AdjustmentForAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |  | $ (1,946)us-gaap_AdjustmentForAmortization / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember |
[1] | For the three months ended March 31, 2015, there were no other-than-temporary impairments. For the three months ended March 31, 2014, other-than-temporary impairments were $1,671, of which $113 were recognized through the Income Statement and $1,558 were recognized in Accumulated Other Comprehensive Income.

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- 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
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Period Type: | duration

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- Definition Includes income from mortgage banking servicing real estate mortgages, net of subservicing costs, and market valuation changes of MSRs held at fair value. + References No definition available. + Details
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- Definition The aggregate net change in market value for certain assets and liabilities that was included in earnings for the period. This includes changes in market values for assets and liabilities accounted for at fair value, as well as the credit portion of other-than-temporary impairments on securities available for sale, impairments on loans held-for-sale and real estate owned. This excludes valuation adjustments recorded in Mortgage Banking Activities, Net. + References No definition available. + Details
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- Definition The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives. + 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 + Details
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