XML 125 R144.htm IDEA: XBRL DOCUMENT v2.4.1.9
Financial Information by Segment (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Segment Reporting Information [Line Items]                      
Interest income $ 65,251us-gaap_InterestAndDividendIncomeOperating $ 63,351us-gaap_InterestAndDividendIncomeOperating $ 57,993us-gaap_InterestAndDividendIncomeOperating $ 55,475us-gaap_InterestAndDividendIncomeOperating $ 57,492us-gaap_InterestAndDividendIncomeOperating $ 57,420us-gaap_InterestAndDividendIncomeOperating $ 57,719us-gaap_InterestAndDividendIncomeOperating $ 53,525us-gaap_InterestAndDividendIncomeOperating $ 242,070us-gaap_InterestAndDividendIncomeOperating $ 226,156us-gaap_InterestAndDividendIncomeOperating $ 231,384us-gaap_InterestAndDividendIncomeOperating
Interest expense (23,903)us-gaap_InterestExpense (23,350)us-gaap_InterestExpense (21,151)us-gaap_InterestExpense (19,059)us-gaap_InterestExpense (19,528)us-gaap_InterestExpense (21,725)us-gaap_InterestExpense (21,416)us-gaap_InterestExpense (18,302)us-gaap_InterestExpense (87,463)us-gaap_InterestExpense (80,971)us-gaap_InterestExpense (120,705)us-gaap_InterestExpense
Net interest income (loss) 41,348us-gaap_InterestIncomeExpenseNet 40,001us-gaap_InterestIncomeExpenseNet 36,842us-gaap_InterestIncomeExpenseNet 36,416us-gaap_InterestIncomeExpenseNet 37,964us-gaap_InterestIncomeExpenseNet 35,695us-gaap_InterestIncomeExpenseNet 36,303us-gaap_InterestIncomeExpenseNet 35,223us-gaap_InterestIncomeExpenseNet 154,607us-gaap_InterestIncomeExpenseNet 145,185us-gaap_InterestIncomeExpenseNet 110,679us-gaap_InterestIncomeExpenseNet
Provision for loan losses                 (961)us-gaap_ProvisionForLoanLeaseAndOtherLosses (4,737)us-gaap_ProvisionForLoanLeaseAndOtherLosses (3,648)us-gaap_ProvisionForLoanLeaseAndOtherLosses
Non interest income                      
Mortgage banking activities, net                 34,938rwt_MortgageBankingActivitiesNet 102,494rwt_MortgageBankingActivitiesNet 36,593rwt_MortgageBankingActivitiesNet
MSR income (loss)                 (4,261)rwt_MortgageServicingRightsIncomeIncludingMarketValuationChangesOfMSRs 20,309rwt_MortgageServicingRightsIncomeIncludingMarketValuationChangesOfMSRs (1,391)rwt_MortgageServicingRightsIncomeIncludingMarketValuationChangesOfMSRs
Other market valuation adjustments, net                 (10,146)rwt_OtherMarketValuationAdjustments (5,709)rwt_OtherMarketValuationAdjustments 1,539rwt_OtherMarketValuationAdjustments
Realized gains, net                 15,478us-gaap_RealizedInvestmentGainsLosses 25,259us-gaap_RealizedInvestmentGainsLosses 54,921us-gaap_RealizedInvestmentGainsLosses
Total non interest income, net 10,686us-gaap_NoninterestIncome 28,519us-gaap_NoninterestIncome 1,475us-gaap_NoninterestIncome (4,671)us-gaap_NoninterestIncome 24,918us-gaap_NoninterestIncome 5,346us-gaap_NoninterestIncome 53,568us-gaap_NoninterestIncome 58,522us-gaap_NoninterestIncome 36,009us-gaap_NoninterestIncome 142,353us-gaap_NoninterestIncome 91,662us-gaap_NoninterestIncome
Direct operating expenses 26,462us-gaap_OperatingExpenses 21,406us-gaap_OperatingExpenses 22,282us-gaap_OperatingExpenses 19,973us-gaap_OperatingExpenses 19,670us-gaap_OperatingExpenses 22,320us-gaap_OperatingExpenses 24,430us-gaap_OperatingExpenses 20,187us-gaap_OperatingExpenses (90,123)us-gaap_OperatingExpenses (86,607)us-gaap_OperatingExpenses (65,633)us-gaap_OperatingExpenses
Other income                 1,781us-gaap_OtherNonoperatingIncome (12,000)us-gaap_OtherNonoperatingIncome  
Other expense                   (12,000)us-gaap_OtherNoninterestExpense  
(Provision for) benefit from income taxes                 (744)us-gaap_IncomeTaxExpenseBenefit (10,948)us-gaap_IncomeTaxExpenseBenefit (1,291)us-gaap_IncomeTaxExpenseBenefit
Net income 27,122us-gaap_NetIncomeLoss 45,097us-gaap_NetIncomeLoss 16,017us-gaap_NetIncomeLoss 12,333us-gaap_NetIncomeLoss 25,135us-gaap_NetIncomeLoss 21,929us-gaap_NetIncomeLoss 65,573us-gaap_NetIncomeLoss 60,160us-gaap_NetIncomeLoss 100,569us-gaap_NetIncomeLoss 173,246us-gaap_NetIncomeLoss 131,769us-gaap_NetIncomeLoss
Supplemental Disclosures                      
Residential loans 3,398,573us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer       2,166,434us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer       3,398,573us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer 2,166,434us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer 2,835,470us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer
Commercial loans 566,927us-gaap_LoansAndLeasesReceivableNetReportedAmountCommercial       432,455us-gaap_LoansAndLeasesReceivableNetReportedAmountCommercial       566,927us-gaap_LoansAndLeasesReceivableNetReportedAmountCommercial 432,455us-gaap_LoansAndLeasesReceivableNetReportedAmountCommercial 313,010us-gaap_LoansAndLeasesReceivableNetReportedAmountCommercial
Real estate securities 1,379,230us-gaap_MarketableSecurities       1,682,861us-gaap_MarketableSecurities       1,379,230us-gaap_MarketableSecurities 1,682,861us-gaap_MarketableSecurities 1,108,753us-gaap_MarketableSecurities
Mortgage servicing rights 139,293us-gaap_ServicingAssetAtFairValueAmount       64,824us-gaap_ServicingAssetAtFairValueAmount       139,293us-gaap_ServicingAssetAtFairValueAmount 64,824us-gaap_ServicingAssetAtFairValueAmount 5,315us-gaap_ServicingAssetAtFairValueAmount
Total assets 5,918,966us-gaap_Assets [1]       4,608,528us-gaap_Assets [1]       5,918,966us-gaap_Assets [1] 4,608,528us-gaap_Assets [1] 4,444,098us-gaap_Assets
Non-cash amortization expense                 33,698us-gaap_AmortizationOfIntangibleAssets 26,442us-gaap_AmortizationOfIntangibleAssets 24,660us-gaap_AmortizationOfIntangibleAssets
Operating Segments | Residential Mortgage Banking                      
Segment Reporting Information [Line Items]                      
Interest income                 58,272us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 52,517us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 19,714us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember
Interest expense                 (12,776)us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 (10,167)us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 (3,179)us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember
Net interest income (loss)                 45,496us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 42,350us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 16,535us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember
Non interest income                      
Mortgage banking activities, net                 21,498rwt_MortgageBankingActivitiesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 79,393rwt_MortgageBankingActivitiesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 35,438rwt_MortgageBankingActivitiesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember
Other market valuation adjustments, net                 56rwt_OtherMarketValuationAdjustments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 38rwt_OtherMarketValuationAdjustments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 623rwt_OtherMarketValuationAdjustments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember
Total non interest income, net                 21,554us-gaap_NoninterestIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 79,431us-gaap_NoninterestIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 35,793us-gaap_NoninterestIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember
Direct operating expenses                 (37,664)us-gaap_OperatingExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 (22,880)us-gaap_OperatingExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 (13,214)us-gaap_OperatingExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember
(Provision for) benefit from income taxes                 (1,774)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 (5,947)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		  
Segment Contribution                 27,612us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 92,954us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 39,382us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember
Supplemental Disclosures                      
Residential loans 1,342,519us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		       404,267us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		       1,342,519us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 404,267us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 562,658us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember
Real estate securities 93,802us-gaap_MarketableSecurities
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		       110,505us-gaap_MarketableSecurities
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		       93,802us-gaap_MarketableSecurities
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 110,505us-gaap_MarketableSecurities
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 10,409us-gaap_MarketableSecurities
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember
Mortgage servicing rights                     5,315us-gaap_ServicingAssetAtFairValueAmount
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember
Total assets 1,468,856us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		       531,092us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		       1,468,856us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 531,092us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		 583,117us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember
Non-cash amortization expense                 (181)us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialMortgageBankingMember		    
Operating Segments | Residential Investments                      
Segment Reporting Information [Line Items]                      
Interest income                 110,433us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 96,399us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 93,266us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember
Interest expense                 (11,848)us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 (10,067)us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 (11,065)us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember
Net interest income (loss)                 98,585us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 86,332us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 82,201us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember
Non interest income                      
MSR income (loss)                 (4,261)rwt_MortgageServicingRightsIncomeIncludingMarketValuationChangesOfMSRs
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 20,309rwt_MortgageServicingRightsIncomeIncludingMarketValuationChangesOfMSRs
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 (1,391)rwt_MortgageServicingRightsIncomeIncludingMarketValuationChangesOfMSRs
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember
Other market valuation adjustments, net                 (9,178)rwt_OtherMarketValuationAdjustments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 (5,134)rwt_OtherMarketValuationAdjustments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 (5,228)rwt_OtherMarketValuationAdjustments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember
Realized gains, net                 13,777us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 24,765us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 32,451us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember
Total non interest income, net                 338us-gaap_NoninterestIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 39,940us-gaap_NoninterestIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 25,832us-gaap_NoninterestIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember
Direct operating expenses                 (3,681)us-gaap_OperatingExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 (4,035)us-gaap_OperatingExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 (5,711)us-gaap_OperatingExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember
Other income                 181us-gaap_OtherNonoperatingIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		    
(Provision for) benefit from income taxes                 1,340us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 (3,027)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		  
Segment Contribution                 96,763us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 119,210us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 102,322us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember
Supplemental Disclosures                      
Residential loans 581,668us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		               581,668us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		    
Real estate securities 1,285,428us-gaap_MarketableSecurities
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		       1,572,356us-gaap_MarketableSecurities
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		       1,285,428us-gaap_MarketableSecurities
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 1,572,356us-gaap_MarketableSecurities
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 1,098,344us-gaap_MarketableSecurities
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember
Mortgage servicing rights 139,293us-gaap_ServicingAssetAtFairValueAmount
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		       64,824us-gaap_ServicingAssetAtFairValueAmount
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		       139,293us-gaap_ServicingAssetAtFairValueAmount
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 64,824us-gaap_ServicingAssetAtFairValueAmount
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		  
Total assets 2,057,256us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		       1,655,209us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		       2,057,256us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 1,655,209us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 1,112,948us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember
Non-cash amortization expense                 42,784us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 34,578us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_ResidentialInvestmentsMember		 30,576us-gaap_AmortizationOfIntangibleAssets
/ 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                 47,567us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 43,420us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 26,048us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember
Interest expense                 (15,836)us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 (12,677)us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 (1,123)us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember
Net interest income (loss)                 31,731us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 30,743us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 24,925us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember
Provision for loan losses                 (84)us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 (3,288)us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 (3,477)us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember
Non interest income                      
Mortgage banking activities, net                 13,440rwt_MortgageBankingActivitiesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 23,102rwt_MortgageBankingActivitiesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 1,155rwt_MortgageBankingActivitiesNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember
Realized gains, net                   210us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		  
Total non interest income, net                 13,440us-gaap_NoninterestIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 23,311us-gaap_NoninterestIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 1,423us-gaap_NoninterestIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember
Direct operating expenses                 (11,324)us-gaap_OperatingExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 (9,580)us-gaap_OperatingExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 (11,085)us-gaap_OperatingExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember
(Provision for) benefit from income taxes                 (234)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 (3,827)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 (13)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember
Segment Contribution                 33,529us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 37,360us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 11,505us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember
Supplemental Disclosures                      
Commercial loans 566,927us-gaap_LoansAndLeasesReceivableNetReportedAmountCommercial
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		       432,455us-gaap_LoansAndLeasesReceivableNetReportedAmountCommercial
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		       566,927us-gaap_LoansAndLeasesReceivableNetReportedAmountCommercial
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 432,455us-gaap_LoansAndLeasesReceivableNetReportedAmountCommercial
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 313,010us-gaap_LoansAndLeasesReceivableNetReportedAmountCommercial
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember
Total assets 575,943us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		       439,139us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		       575,943us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 439,139us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 320,670us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember
Non-cash amortization expense                 (673)us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 (798)us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember		 556us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= rwt_CommercialMortgageBankingAndInvestmentsMember
Corporate/Other                      
Segment Reporting Information [Line Items]                      
Interest income                 25,798us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 33,820us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 92,356us-gaap_InterestAndDividendIncomeOperating
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Interest expense                 (47,003)us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 (48,060)us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 (105,338)us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Net interest income (loss)                 (21,205)us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 (14,240)us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 (12,982)us-gaap_InterestIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Provision for loan losses                 (877)us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 (1,449)us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 (171)us-gaap_ProvisionForLoanLeaseAndOtherLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Non interest income                      
Other market valuation adjustments, net                 (1,024)rwt_OtherMarketValuationAdjustments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 (613)rwt_OtherMarketValuationAdjustments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 6,144rwt_OtherMarketValuationAdjustments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Realized gains, net                 1,701us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 284us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 22,470us-gaap_RealizedInvestmentGainsLosses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Total non interest income, net                 677us-gaap_NoninterestIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 (329)us-gaap_NoninterestIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 28,614us-gaap_NoninterestIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Direct operating expenses                 (37,454)us-gaap_OperatingExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 (50,113)us-gaap_OperatingExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 (35,623)us-gaap_OperatingExpenses
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Other income                 1,600us-gaap_OtherNonoperatingIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		    
Other expense                   (12,000)us-gaap_OtherNoninterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		  
(Provision for) benefit from income taxes                 (76)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 1,853us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 (1,278)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Segment Contribution                 (57,334)us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 (76,278)us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 (21,440)us-gaap_IncomeLossFromContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Supplemental Disclosures                      
Residential loans 1,474,386us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		       1,762,167us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		       1,474,386us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 1,762,167us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 2,272,812us-gaap_LoansAndLeasesReceivableNetReportedAmountConsumer
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Total assets 1,816,911us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		       1,983,088us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		       1,816,911us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 1,983,088us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 2,427,363us-gaap_Assets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Non-cash amortization expense                 $ (8,232)us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 $ (7,338)us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember		 $ (3,472)us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
[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 December 31, 2014 and 2013, assets of consolidated VIEs totaled $1,900,208 and $2,299,576, respectively, and liabilities of consolidated VIEs totaled $1,546,490 and $1,944,911, respectively. See Note 4 for further discussion.