$RWT
REDWOOD TRUST INC Stock $rwt

$rwt Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000093023621000007 Filed on February 26, 2021

Income Statement

Concept	2019 Q4	2018 Q4	2018
Revenue	$192.6M	$119.7M	$378.7M
YoY Change	60.85%	67.52%	52.67%
Cost Of Revenue	$147.7M	$85.00M	$239.0M
YoY Change	73.76%	135.46%	119.67%
Gross Profit	$44.90M	$34.80M	$139.7M
YoY Change	29.02%	-1.69%	0.36%
Gross Profit Margin	23.31%	29.07%	36.89%
Selling, General & Admin	$36.40M	$15.80M	$69.10M
YoY Change	130.38%	-9.2%	3.13%
% of Gross Profit	81.07%	45.4%	49.46%
Research & Development			$7.451M
YoY Change			5.34%
% of Gross Profit			5.33%
Depreciation & Amortization	$4.400M	$400.0K	$1.300M
YoY Change	1000.0%	33.33%	8.33%
% of Gross Profit	9.8%	1.15%	0.93%
Operating Expenses	$49.44M	$19.38M	$82.98M
YoY Change	155.16%	-4.86%	7.55%
Operating Profit	-$4.544M	$15.42M	$56.72M
YoY Change	-129.46%	2.59%	-8.58%
Interest Expense	$147.7M	$84.96M	$239.0M
YoY Change	73.85%	135.3%	119.67%
% of Operating Profit		550.91%	421.42%
Other Income/Expense, Net			$196.0K
YoY Change
Pretax Income	$53.50M	-$2.200M	$130.7M
YoY Change	-2531.82%	-108.49%	-14.11%
Income Tax	$4.300M	-$1.300M	$11.09M
% Of Pretax Income	8.04%		8.48%
Net Earnings	$49.14M	-$913.0K	$119.6M
YoY Change	-5482.58%	-102.95%	-14.82%
Net Earnings / Revenue	25.52%	-0.76%	31.58%
Basic Earnings Per Share	$0.42	-$0.02	$1.47
Diluted Earnings Per Share	$0.38	-$0.02	$1.34
COMMON SHARES
Basic Shares Outstanding	112.7M shares	82.97M shares	78.72M shares
Diluted Shares Outstanding			110.0M shares

Balance Sheet

Concept	2019 Q4	2018 Q4	2018
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.297B	$1.628B	$176.0M
YoY Change	-20.36%	0.43%	21.38%
Cash & Equivalents	$197.0M	$176.0M	$176.0M
Short-Term Investments	$1.100B	$1.452B
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$430.0M	$284.0M	$284.0M
YoY Change	51.41%	19.33%	19.33%
LONG-TERM ASSETS
Property, Plant & Equipment	$4.901M	$5.106M	$5.000M
YoY Change	-4.01%	93.04%	66.67%
Goodwill	$88.68M	$0.00
YoY Change
Intangibles	$72.79M	$0.00
YoY Change
Long-Term Investments	$1.458B	$1.891B	$1.891B
YoY Change	-22.9%	22.79%	22.79%
Other Assets	$94.00M	$29.00M	$29.00M
YoY Change	224.14%	1350.0%	1350.0%
Total Long-Term Assets	$17.57B	$11.65B	$11.65B
YoY Change	50.73%	71.33%	71.32%
TOTAL ASSETS
Total Short-Term Assets	$430.0M	$284.0M	$284.0M
Total Long-Term Assets	$17.57B	$11.65B	$11.65B
Total Assets	$18.00B	$11.94B	$11.94B
YoY Change	50.75%	69.57%	69.56%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$5.468M	$423.0K
YoY Change	1192.67%	-68.41%
Accrued Expenses	$121.0M	$77.00M	$77.00M
YoY Change	57.14%	75.0%	75.0%
Deferred Revenue
YoY Change
Short-Term Debt	$2.329B	$2.400B	$2.400B
YoY Change	-2.96%	23.81%	23.78%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$2.455B	$2.477B	$2.477B
YoY Change	-0.89%	24.85%	24.85%
LONG-TERM LIABILITIES
Long-Term Debt	$13.47B	$7.982B	$7.982B
YoY Change	68.74%	113.42%	113.42%
Other Long-Term Liabilities	$239.0M	$120.0M	$120.0M
YoY Change	99.17%	30.43%	30.43%
Total Long-Term Liabilities	$13.71B	$8.102B	$8.102B
YoY Change	69.19%	111.43%	111.43%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.455B	$2.477B	$2.477B
Total Long-Term Liabilities	$13.71B	$8.102B	$8.102B
Total Liabilities	$16.17B	$10.59B	$10.59B
YoY Change	52.69%	81.7%	81.69%
SHAREHOLDERS EQUITY
Retained Earnings	$1.579B	$1.410B
YoY Change	12.0%	9.27%
Common Stock	$2.271B	$1.812B
YoY Change	25.3%	8.22%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.827B	$1.349B	$1.349B
YoY Change
Total Liabilities & Shareholders Equity	$18.00B	$11.94B	$11.94B
YoY Change	50.75%	69.57%	69.56%

Cashflow Statement

Concept	2019 Q4	2018 Q4	2018
OPERATING ACTIVITIES
Net Income	$49.14M	-$913.0K	$119.6M
YoY Change	-5482.58%	-102.95%	-14.82%
Depreciation, Depletion And Amortization	$4.400M	$400.0K	$1.300M
YoY Change	1000.0%	33.33%	8.33%
Cash From Operating Activities	$35.70M	-$248.7M	-$1.612B
YoY Change	-114.35%	-77.06%	-5.92%
INVESTING ACTIVITIES
Capital Expenditures		-$25.50M	-$25.50M
YoY Change
Acquisitions			$9.999M
YoY Change
Other Investing Activities	$110.4M	-$341.9M	$57.32M
YoY Change	-132.29%	-696.68%	-211.32%
Cash From Investing Activities	$110.4M	-$367.4M	-$12.75M
YoY Change	-130.05%	-741.19%	-104.55%
FINANCING ACTIVITIES
Cash Dividend Paid			$96.80M
YoY Change			9.63%
Common Stock Issuance & Retirement, Net			-$126.3M
YoY Change			-1656.2%
Debt Paid & Issued, Net			$0.00
YoY Change
Cash From Financing Activities	-361.4M	620.4M	$1.683B
YoY Change	-158.25%	-30.27%	23.9%
NET CHANGE
Cash From Operating Activities	35.70M	-248.7M	-$1.612B
Cash From Investing Activities	110.4M	-367.4M	-$12.75M
Cash From Financing Activities	-361.4M	620.4M	$1.683B
Net Change In Cash	-215.3M	4.300M	$58.27M
YoY Change	-5106.98%	-103.14%	-178.05%
FREE CASH FLOW
Cash From Operating Activities	$35.70M	-$248.7M	-$1.612B
Capital Expenditures		-$25.50M	-$25.50M
Free Cash Flow		-$223.2M	-$1.586B
YoY Change		-79.41%	-7.41%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0000930236
CY2019Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent
CY2020Q4	us-gaap	Operating Lease Liability Statement Of Financial Position Extensible List OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	1-13759
CY2020	dei	Entity Registrant Name EntityRegistrantName	REDWOOD TRUST, INC.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MD
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	68-0329422
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	One Belvedere Place, Suite 300
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Mill Valley,
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	94941
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	522609000	USD
CY2019Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	2329145000	USD
CY2020	dei	City Area Code CityAreaCode	415
CY2020	dei	Local Phone Number LocalPhoneNumber	389-7373
CY2020	dei	Security12b Title Security12bTitle	Common stock, par value $0.01 per share
CY2020	dei	Trading Symbol TradingSymbol	RWT
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Shell Company EntityShellCompany	false
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CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	17077000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-7298000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	12165000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	19967000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	25561000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-32806000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-16894000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	0	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-45734000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-19784000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-23951000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-627581000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	149399000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	95649000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1827231000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-581847000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-45734000	USD
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	5547000	USD
CY2020	rwt	Stock Issued During Period Value Employee Stock Purchase Plans And Other Incentive Plans StockIssuedDuringPeriodValueEmployeeStockPurchasePlansAndOtherIncentivePlans	-3952000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	15298000	USD
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	21659000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.725
CY2020	us-gaap	Dividends Common Stock DividendsCommonStock	83985000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1110899000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1348794000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	169183000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-19784000	USD
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	442172000	USD
CY2019	rwt	Stock Issued During Period Value Dividend Reinvestment And Stock Purchase Plan StockIssuedDuringPeriodValueDividendReinvestmentAndStockPurchasePlan	6307000	USD
CY2019	rwt	Stock Issued During Period Value Employee Stock Purchase Plans And Other Incentive Plans StockIssuedDuringPeriodValueEmployeeStockPurchasePlansAndOtherIncentivePlans	-4946000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	14957000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.20
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	129452000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1827231000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	1212287000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	119600000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-23951000	USD
CY2018	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	142228000	USD
CY2018	rwt	Stock Issued During Period Value Dividend Reinvestment And Stock Purchase Plan StockIssuedDuringPeriodValueDividendReinvestmentAndStockPurchasePlan	1706000	USD
CY2018	rwt	Stock Issued During Period Value Employee Stock Purchase Plans And Other Incentive Plans StockIssuedDuringPeriodValueEmployeeStockPurchasePlansAndOtherIncentivePlans	-4466000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	13736000	USD
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	15544000	USD
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.18
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	96802000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1348794000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-581847000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	169183000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	119600000	USD
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-8550000	USD
CY2019	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	5066000	USD
CY2018	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	13687000	USD
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	17365000	USD
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	10133000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	1308000	USD
CY2020	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	1004058000	USD
CY2019	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	569915000	USD
CY2018	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	0	USD
CY2020	us-gaap	Payments To Purchase Loans Held For Sale PaymentsToPurchaseLoansHeldForSale	4431468000	USD
CY2019	us-gaap	Payments To Purchase Loans Held For Sale PaymentsToPurchaseLoansHeldForSale	5823547000	USD
CY2018	us-gaap	Payments To Purchase Loans Held For Sale PaymentsToPurchaseLoansHeldForSale	7162131000	USD
CY2020	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	4776469000	USD
CY2019	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	5198089000	USD
CY2018	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	5383313000	USD
CY2020	us-gaap	Proceeds From Collection Of Loans Held For Sale ProceedsFromCollectionOfLoansHeldForSale	62736000	USD
CY2019	us-gaap	Proceeds From Collection Of Loans Held For Sale ProceedsFromCollectionOfLoansHeldForSale	106183000	USD
CY2018	us-gaap	Proceeds From Collection Of Loans Held For Sale ProceedsFromCollectionOfLoansHeldForSale	66892000	USD
CY2020	rwt	Payments For Proceeds From Derivative Instrument Operating Activities PaymentsForProceedsFromDerivativeInstrumentOperatingActivities	-201036000	USD
CY2019	rwt	Payments For Proceeds From Derivative Instrument Operating Activities PaymentsForProceedsFromDerivativeInstrumentOperatingActivities	-66059000	USD
CY2018	rwt	Payments For Proceeds From Derivative Instrument Operating Activities PaymentsForProceedsFromDerivativeInstrumentOperatingActivities	51115000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	15298000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	14957000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	13736000	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	88675000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	rwt	Market Valuation Adjustments Net MarketValuationAdjustmentsNet	-541399000	USD
CY2019	rwt	Market Valuation Adjustments Net MarketValuationAdjustmentsNet	97006000	USD
CY2018	rwt	Market Valuation Adjustments Net MarketValuationAdjustmentsNet	24069000	USD
CY2020	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	30424000	USD
CY2019	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	23821000	USD
CY2018	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	27041000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-301381000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	83210000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	41849000	USD
CY2020	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	-68507000	USD
CY2019	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	4502000	USD
CY2018	us-gaap	Increase Decrease In Operating Liabilities IncreaseDecreaseInOperatingLiabilities	21080000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-505467000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-1165577000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-1611733000	USD
CY2020	rwt	Origination Of Loans And Leases Held For Investment OriginationOfLoansAndLeasesHeldForInvestment	426404000	USD
CY2019	rwt	Origination Of Loans And Leases Held For Investment OriginationOfLoansAndLeasesHeldForInvestment	448189000	USD
CY2018	rwt	Origination Of Loans And Leases Held For Investment OriginationOfLoansAndLeasesHeldForInvestment	0	USD
CY2020	us-gaap	Payments To Acquire Loans And Leases Held For Investment PaymentsToAcquireLoansAndLeasesHeldForInvestment	0	USD
CY2019	us-gaap	Payments To Acquire Loans And Leases Held For Investment PaymentsToAcquireLoansAndLeasesHeldForInvestment	49489000	USD
CY2018	us-gaap	Payments To Acquire Loans And Leases Held For Investment PaymentsToAcquireLoansAndLeasesHeldForInvestment	147523000	USD
CY2020	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	1574160000	USD
CY2019	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	9422000	USD
CY2018	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	0	USD
CY2020	us-gaap	Proceeds From Principal Repayments On Loans And Leases Held For Investment ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment	2256196000	USD
CY2019	us-gaap	Proceeds From Principal Repayments On Loans And Leases Held For Investment ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment	1751303000	USD
CY2018	us-gaap	Proceeds From Principal Repayments On Loans And Leases Held For Investment ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment	781063000	USD
CY2020	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	112626000	USD
CY2019	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	345403000	USD
CY2018	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	609568000	USD
CY2020	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	142990000	USD
CY2019	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	0	USD
CY2018	us-gaap	Proceeds From Collection Of Retained Interest In Securitized Receivables ProceedsFromCollectionOfRetainedInterestInSecuritizedReceivables	0	USD
CY2020	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	658899000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	707357000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	582331000	USD
CY2020	rwt	Proceeds From Principal Repayments On Securities ProceedsFromPrincipalRepaymentsOnSecurities	27210000	USD
CY2019	rwt	Proceeds From Principal Repayments On Securities ProceedsFromPrincipalRepaymentsOnSecurities	84303000	USD
CY2018	rwt	Proceeds From Principal Repayments On Securities ProceedsFromPrincipalRepaymentsOnSecurities	84495000	USD
CY2020	rwt	Payments For Servicing Advance Investments PaymentsForServicingAdvanceInvestments	179419000	USD
CY2019	rwt	Payments For Servicing Advance Investments PaymentsForServicingAdvanceInvestments	69610000	USD
CY2018	rwt	Payments For Servicing Advance Investments PaymentsForServicingAdvanceInvestments	395813000	USD
CY2020	rwt	Repayments Of Servicing Advance Investments RepaymentsOfServicingAdvanceInvestments	107527000	USD
CY2019	rwt	Repayments Of Servicing Advance Investments RepaymentsOfServicingAdvanceInvestments	203876000	USD
CY2018	rwt	Repayments Of Servicing Advance Investments RepaymentsOfServicingAdvanceInvestments	94644000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	3714000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	9999000	USD
CY2020	us-gaap	Payments To Acquire Business Two Net Of Cash Acquired PaymentsToAcquireBusinessTwoNetOfCashAcquired	0	USD
CY2019	us-gaap	Payments To Acquire Business Two Net Of Cash Acquired PaymentsToAcquireBusinessTwoNetOfCashAcquired	451626000	USD
CY2018	us-gaap	Payments To Acquire Business Two Net Of Cash Acquired PaymentsToAcquireBusinessTwoNetOfCashAcquired	0	USD
CY2020	rwt	Payments For Proceeds From Investment In Multifamily Loan Fund PaymentsForProceedsFromInvestmentInMultifamilyLoanFund	-40226000	USD
CY2019	rwt	Payments For Proceeds From Investment In Multifamily Loan Fund PaymentsForProceedsFromInvestmentInMultifamilyLoanFund	40467000	USD
CY2018	rwt	Payments For Proceeds From Investment In Multifamily Loan Fund PaymentsForProceedsFromInvestmentInMultifamilyLoanFund	0	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	18345000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	29468000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	57322000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	4070414000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	1025862000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-12752000	USD
CY2020	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	5496761000	USD
CY2019	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	6452566000	USD
CY2018	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	6975965000	USD
CY2020	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	7303543000	USD
CY2019	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	7193677000	USD
CY2018	us-gaap	Repayments Of Short Term Debt RepaymentsOfShortTermDebt	6711264000	USD
CY2020	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	1684778000	USD
CY2019	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	1397126000	USD
CY2018	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	1658848000	USD
CY2020	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	1493438000	USD
CY2019	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	1123119000	USD
CY2018	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	459171000	USD
CY2020	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	1473590000	USD
CY2019	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	387053000	USD
CY2018	us-gaap	Proceeds From Other Debt ProceedsFromOtherDebt	199000000	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	10244000	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	7023000	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	4977000	USD
CY2020	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	2974795000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	4286000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	5471000	USD
CY2019	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	1137000	USD
CY2018	us-gaap	Repayments Of Other Debt RepaymentsOfOtherDebt	0	USD
CY2020	us-gaap	Payments For Proceeds From Derivative Instrument Financing Activities PaymentsForProceedsFromDerivativeInstrumentFinancingActivities	84336000	USD
CY2019	us-gaap	Payments For Proceeds From Derivative Instrument Financing Activities PaymentsForProceedsFromDerivativeInstrumentFinancingActivities	0	USD
CY2018	us-gaap	Payments For Proceeds From Derivative Instrument Financing Activities PaymentsForProceedsFromDerivativeInstrumentFinancingActivities	0	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	5881000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	450710000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	142601000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	21659000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	16315000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	4839000	USD
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	83985000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	129452000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	96802000	USD
CY2018	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	15717000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	452216000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	207014000	USD
CY2019Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Asset DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAsset	0	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	3946000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-2105000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-291000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-3311330000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	225471000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1682755000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	253617000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	85756000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	58270000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	290833000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	205077000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	146807000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	544450000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	290833000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	205077000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	456147000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	1190000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	7963000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	10594000	USD
CY2020Q4	us-gaap	Transfers Of Financial Assets Accounted For As Sale Initial Fair Value Of Assets Obtained As Proceeds TransfersOfFinancialAssetsAccountedForAsSaleInitialFairValueOfAssetsObtainedAsProceeds	53276000	USD
CY2019Q4	us-gaap	Transfers Of Financial Assets Accounted For As Sale Initial Fair Value Of Assets Obtained As Proceeds TransfersOfFinancialAssetsAccountedForAsSaleInitialFairValueOfAssetsObtainedAsProceeds	13729000	USD
CY2018Q4	us-gaap	Transfers Of Financial Assets Accounted For As Sale Initial Fair Value Of Assets Obtained As Proceeds TransfersOfFinancialAssetsAccountedForAsSaleInitialFairValueOfAssetsObtainedAsProceeds	51911000	USD
CY2020	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	0	USD
CY2019	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	868000	USD
CY2018	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	328000	USD
CY2020	rwt	Consolidation Of Residential Loans Held In Securitization Trusts ConsolidationOfResidentialLoansHeldInSecuritizationTrusts	0	USD
CY2019	rwt	Consolidation Of Residential Loans Held In Securitization Trusts ConsolidationOfResidentialLoansHeldInSecuritizationTrusts	1190995000	USD
CY2018	rwt	Consolidation Of Residential Loans Held In Securitization Trusts ConsolidationOfResidentialLoansHeldInSecuritizationTrusts	1206645000	USD
CY2020	rwt	Consolidation Of Residential Asset Backed Securities ConsolidationOfResidentialAssetBackedSecurities	0	USD
CY2019	rwt	Consolidation Of Residential Asset Backed Securities ConsolidationOfResidentialAssetBackedSecurities	997783000	USD
CY2018	rwt	Consolidation Of Residential Asset Backed Securities ConsolidationOfResidentialAssetBackedSecurities	978996000	USD
CY2020	rwt	Consolidation Of Multifamily Loans Held In Securitizations Trusts ConsolidationOfMultifamilyLoansHeldInSecuritizationsTrusts	3849779000	USD
CY2019	rwt	Consolidation Of Multifamily Loans Held In Securitizations Trusts ConsolidationOfMultifamilyLoansHeldInSecuritizationsTrusts	-2162385000	USD
CY2018	rwt	Consolidation Of Multifamily Loans Held In Securitizations Trusts ConsolidationOfMultifamilyLoansHeldInSecuritizationsTrusts	2099916000	USD
CY2020	rwt	Consolidation Of Multifamily Asset Backed Securities ConsolidationOfMultifamilyAssetBackedSecurities	3706789000	USD
CY2019	rwt	Consolidation Of Multifamily Asset Backed Securities ConsolidationOfMultifamilyAssetBackedSecurities	-2058214000	USD
CY2018	rwt	Consolidation Of Multifamily Asset Backed Securities ConsolidationOfMultifamilyAssetBackedSecurities	1975324000	USD
CY2020	rwt	Consolidation Of Single Family Loans Held In Securitizations Trusts ConsolidationOfSingleFamilyLoansHeldInSecuritizationsTrusts	0	USD
CY2019	rwt	Consolidation Of Single Family Loans Held In Securitizations Trusts ConsolidationOfSingleFamilyLoansHeldInSecuritizationsTrusts	1829281000	USD
CY2018	rwt	Consolidation Of Single Family Loans Held In Securitizations Trusts ConsolidationOfSingleFamilyLoansHeldInSecuritizationsTrusts	0	USD
CY2020	rwt	Consolidation Of Single Family Asset Backed Securities ConsolidationOfSingleFamilyAssetBackedSecurities	0	USD
CY2019	rwt	Consolidation Of Single Family Asset Backed Securities ConsolidationOfSingleFamilyAssetBackedSecurities	1656023000	USD
CY2018	rwt	Consolidation Of Single Family Asset Backed Securities ConsolidationOfSingleFamilyAssetBackedSecurities	0	USD
CY2020	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1	1868656000	USD
CY2019	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1	1801560000	USD
CY2018	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1	2062809000	USD
CY2020	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	64520000	USD
CY2019	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	22808000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	9000000	USD
CY2020Q2	rwt	Share Based Compensation Arrangement By Share Based Payment Award Award Holding Period ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardHoldingPeriod	P3Y
CY2020	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	14229000	USD
CY2019	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	8609000	USD
CY2018	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	4104000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	7862000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	13094000	USD
CY2018	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2020	rwt	Operating Lease Liability Reduction From Lease Modification OperatingLeaseLiabilityReductionFromLeaseModification	1722000	USD
CY2019	rwt	Operating Lease Liability Reduction From Lease Modification OperatingLeaseLiabilityReductionFromLeaseModification	0	USD
CY2018	rwt	Operating Lease Liability Reduction From Lease Modification OperatingLeaseLiabilityReductionFromLeaseModification	0	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	461000000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	83000000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	197000000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	94000000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	176000000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	29000000	USD
CY2020	us-gaap	Nature Of Operations NatureOfOperations	Organization<div style="margin-top:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Redwood Trust, Inc., together with its subsidiaries, is a specialty finance company focused on several distinct areas of housing credit. Our operating platforms occupy a unique position in the housing finance value chain, providing liquidity to growing segments of the U.S. housing market not served by government programs. We deliver customized housing credit investments to a diverse mix of investors, through our best-in-class securitization platforms; whole-loan distribution activities; and our publicly-traded shares. Our consolidated investment portfolio has evolved to incorporate a diverse mix of residential, business purpose and multifamily investments. Our goal is to provide attractive returns to shareholders through a stable and growing stream of earnings and dividends, capital appreciation, and a commitment to technological innovation that facilitates risk-minded scale. We operate our business in three segments: Residential Lending, Business Purpose Lending, and Third-Party Investments.</span></div><div style="margin-top:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our primary sources of income are net interest income from our investments and non-interest income from our mortgage banking activities. Net interest income consists of the interest income we earn on investments less the interest expense we incur on borrowed funds and other liabilities. Income from mortgage banking activities is generated through the origination and acquisition of loans, and their subsequent sale, securitization, or transfer to our investment portfolios. </span></div><div style="margin-top:12pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Redwood Trust, Inc. has elected to be taxed as a real estate investment trust (“REIT”) under the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”), beginning with its taxable year ended December 31, 1994. We generally refer, collectively, to Redwood Trust, Inc. and those of its subsidiaries that are not subject to subsidiary-level corporate income tax as “the REIT” or “our REIT.” We generally refer to subsidiaries of Redwood Trust, Inc. that are subject to subsidiary-level corporate income tax as “our taxable REIT subsidiaries” or “TRS.” </span></div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Redwood was incorporated in the State of Maryland on April 11, 1994, and commenced operations on August 19, 1994. On March 1, 2019, Redwood completed the acquisition of 5 Arches, LLC ("5 Arches"), at which time 5 Arches became a wholly-owned subsidiary of Redwood. On October 15, 2019, Redwood acquired CoreVest American Finance Lender, LLC and certain affiliated entities ("CoreVest"), at which time CoreVest became wholly owned by Redwood. References herein to “Redwood,” the “company,” “we,” “us,” and “our” include Redwood Trust, Inc. and its consolidated subsidiaries, unless the context otherwise requires. In statements regarding qualification as a REIT, such terms refer solely to Redwood Trust, Inc. Refer to Item 1 - </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Business</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> in this Annual Report on Form 10-K for additional information on our business.</span>
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	segment
CY2013	rwt	Employee Stock Purchase Plan Minimum Percentage Of Common Stock Fair Value Defined To Purchase Shares By Eligible Participants EmployeeStockPurchasePlanMinimumPercentageOfCommonStockFairValueDefinedToPurchaseSharesByEligibleParticipants	0.85
CY2020Q1	us-gaap	Deconsolidation Gain Or Loss Amount DeconsolidationGainOrLossAmount	-72000000	USD
CY2019Q3	rwt	Number Of Partnerships Consolidated NumberOfPartnershipsConsolidated	2	partnership
CY2020Q3	us-gaap	Variable Interest Entity Ownership Percentage VariableInterestEntityOwnershipPercentage	0.80
CY2020	us-gaap	Use Of Estimates UseOfEstimates	The preparation of financial statements requires us to make a number of significant estimates. These include estimates of fair value of certain assets and liabilities, amounts and timing of credit losses, prepayment rates, and other estimates that affect the reported amounts of certain assets and liabilities as of the date of the consolidated financial statements and the reported amounts of certain revenues and expenses during the reported periods. It is likely that changes in these estimates (e.g., valuation changes due to supply and demand, credit performance, prepayments, interest rates, or other reasons) will occur in the near term. Our estimates are inherently subjective in nature and actual results could differ from our estimates and the differences could be material.
CY2020	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	200000	USD
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	3000000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	16000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	10091000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	7073000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	15304000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	12800000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	11597000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	56865000	USD
CY2020Q1	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	89000000	USD
CY2020Q1	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2020Q4	rwt	Special Purpose Entities Liabilities SpecialPurposeEntitiesLiabilities	10000000	USD
CY2019Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Gross DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedGross	1690828000	USD
CY2019Q4	rwt	Special Purpose Entities Liabilities SpecialPurposeEntitiesLiabilities	14000000	USD
CY2020	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	1
	rwt	Risk Sharing Arrangement Term RiskSharingArrangementTerm	P10Y
	rwt	Risk Sharing Arrangement Term RiskSharingArrangementTerm	P10Y
CY2020Q4	rwt	Special Purpose Entities Assets SpecialPurposeEntitiesAssets	46000000	USD
CY2019Q4	rwt	Special Purpose Entities Assets SpecialPurposeEntitiesAssets	48000000	USD
CY2019Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoaned	1690828000	USD
CY2019Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Securities DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimSecurities	1548637000	USD
CY2020Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Gross DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedGross	230539000	USD
CY2020Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Asset DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAsset	0	USD
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1100000	USD
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	700000	USD
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	600000	USD
CY2020Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoaned	230539000	USD
CY2020Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Securities DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimSecurities	228467000	USD
CY2020Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Cash DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimCash	1061000	USD
CY2020Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Amount Offset Against Collateral DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAmountOffsetAgainstCollateral	1011000	USD
CY2020Q4	rwt	Number Of Variable Interest Entities Acquired And Consolidated NumberOfVariableInterestEntitiesAcquiredAndConsolidated	50	investment
CY2019Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Collateral Right To Reclaim Cash DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedCollateralRightToReclaimCash	141260000	USD
CY2019Q4	us-gaap	Derivative Liability Securities Sold Under Agreements To Resell Securities Loaned Amount Offset Against Collateral DerivativeLiabilitySecuritiesSoldUnderAgreementsToResellSecuritiesLoanedAmountOffsetAgainstCollateral	931000	USD
CY2020Q1	us-gaap	Deconsolidation Gain Or Loss Amount DeconsolidationGainOrLossAmount	-72000000	USD
CY2019Q3	rwt	Number Of Partnerships Consolidated NumberOfPartnershipsConsolidated	2	partnership
CY2020Q3	us-gaap	Variable Interest Entity Ownership Percentage VariableInterestEntityOwnershipPercentage	0.80
CY2019Q4	rwt	Number Of Variable Interest Entities Acquired And Consolidated NumberOfVariableInterestEntitiesAcquiredAndConsolidated	49	investment
CY2020	rwt	Market Valuation Adjustments Net MarketValuationAdjustmentsNet	-541399000	USD
CY2019	rwt	Market Valuation Adjustments Net MarketValuationAdjustmentsNet	97006000	USD
CY2018	rwt	Market Valuation Adjustments Net MarketValuationAdjustmentsNet	24069000	USD
CY2020	srt	Mortgage Loans On Real Estate Number Of Loans MortgageLoansOnRealEstateNumberOfLoans	198	loan
CY2020Q4	us-gaap	Principal Amount Outstanding On Loans Managed And Securitized PrincipalAmountOutstandingOnLoansManagedAndSecuritized	172748000	USD
CY2020Q4	rwt	Mortgage Loans On Real Estate Principal Amount Of Delinquent Loans For Thirty To Ninety Days MortgageLoansOnRealEstatePrincipalAmountOfDelinquentLoansForThirtyToNinetyDays	3362000	USD
CY2020Q4	srt	Mortgage Loans On Real Estate Principal Amount Of Delinquent Loans MortgageLoansOnRealEstatePrincipalAmountOfDelinquentLoans	1882000	USD
CY2019	srt	Mortgage Loans On Real Estate Number Of Loans MortgageLoansOnRealEstateNumberOfLoans	669	loan
CY2019Q4	us-gaap	Principal Amount Outstanding On Loans Managed And Securitized PrincipalAmountOutstandingOnLoansManagedAndSecuritized	524928000	USD
CY2019Q4	rwt	Mortgage Loans On Real Estate Principal Amount Of Delinquent Loans For Thirty To Ninety Days MortgageLoansOnRealEstatePrincipalAmountOfDelinquentLoansForThirtyToNinetyDays	1650000	USD
CY2019Q4	srt	Mortgage Loans On Real Estate Principal Amount Of Delinquent Loans MortgageLoansOnRealEstatePrincipalAmountOfDelinquentLoans	747000	USD
CY2020	rwt	Real Estate Owned Transferto Real Estate Owned Number Of Loans RealEstateOwnedTransfertoRealEstateOwnedNumberOfLoans	5	loan
CY2020Q1	rwt	Deconsolidation Of Multifamily Loans DeconsolidationOfMultifamilyLoans	3850000000	USD
CY2020Q4	us-gaap	Trading Securities TradingSecurities	125667000	USD
CY2019Q4	us-gaap	Trading Securities TradingSecurities	860540000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	218458000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	239334000	USD
CY2020Q4	us-gaap	Marketable Securities MarketableSecurities	344125000	USD
CY2019Q4	us-gaap	Marketable Securities MarketableSecurities	1099874000	USD
CY2020Q4	us-gaap	Trading Securities TradingSecurities	125667000	USD
CY2019Q4	us-gaap	Trading Securities TradingSecurities	860540000	USD
CY2020Q4	us-gaap	Investment Owned Balance Principal Amount InvestmentOwnedBalancePrincipalAmount	245855000	USD
CY2019Q4	us-gaap	Investment Owned Balance Principal Amount InvestmentOwnedBalancePrincipalAmount	922330000	USD
CY2020	us-gaap	Payments To Acquire Trading Securities Heldforinvestment PaymentsToAcquireTradingSecuritiesHeldforinvestment	79921000	USD
CY2019	us-gaap	Payments To Acquire Trading Securities Heldforinvestment PaymentsToAcquireTradingSecuritiesHeldforinvestment	366848000	USD
CY2020	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	744914000	USD
CY2019	us-gaap	Proceeds From Sale Of Trading Securities Heldforinvestment ProceedsFromSaleOfTradingSecuritiesHeldforinvestment	592502000	USD
CY2020	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	-230731000	USD
CY2019	us-gaap	Increase Decrease In Trading Securities IncreaseDecreaseInTradingSecurities	56046000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	218458000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	239334000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	57652000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	26538000	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	55192000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	110070000	USD
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	4635000	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	17582000	USD
CY2020Q4	rwt	Debt Securities Available For Sale Principal Balance DebtSecuritiesAvailableForSalePrincipalBalance	283284000	USD
CY2020Q4	rwt	Debt Securities Available For Sale Credit Reserve DebtSecuritiesAvailableForSaleCreditReserve	44967000	USD
CY2020Q4	rwt	Debt Securities Available For Sale Unamortized Discounts Premiums DebtSecuritiesAvailableForSaleUnamortizedDiscountsPremiums	95718000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	142599000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	77294000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1047000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	388000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	218458000	USD
CY2019Q4	rwt	Debt Securities Available For Sale Principal Balance DebtSecuritiesAvailableForSalePrincipalBalance	304077000	USD
CY2019Q4	rwt	Debt Securities Available For Sale Credit Reserve DebtSecuritiesAvailableForSaleCreditReserve	32940000	USD
CY2019Q4	rwt	Debt Securities Available For Sale Unamortized Discounts Premiums DebtSecuritiesAvailableForSaleUnamortizedDiscountsPremiums	124255000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	146882000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	92481000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	29000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	239334000	USD
CY2020Q4	rwt	Number Of Available For Sale Securities NumberOfAvailableForSaleSecurities	96	investment
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	5	investment
CY2020Q4	rwt	Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonths	0	investment
CY2019Q4	rwt	Number Of Available For Sale Securities NumberOfAvailableForSaleSecurities	107	investment
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	1	investment
CY2019Q4	rwt	Number Of Securities Continuous Unrealized Loss Position More Than Twelve Months NumberOfSecuritiesContinuousUnrealizedLossPositionMoreThanTwelveMonths	1	investment
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	400000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	USD
CY2020	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Not Previously Recorded DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded	1864000	USD
CY2020	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Not To Sell Before Recovery Credit Loss Previously Recorded Expense Reversal DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotToSellBeforeRecoveryCreditLossPreviouslyRecordedExpenseReversal	-1476000	USD
CY2020	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Purchased With Credit Deterioration Increase DebtSecuritiesAvailableForSaleAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease	0	USD
CY2020	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Securities Sold DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold	0	USD
CY2020	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Sell Before Recovery DebtSecuritiesAvailableForSaleAllowanceForCreditLossSellBeforeRecovery	0	USD
CY2020	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Writeoff DebtSecuritiesAvailableForSaleAllowanceForCreditLossWriteoff	0	USD
CY2020	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Recovery DebtSecuritiesAvailableForSaleAllowanceForCreditLossRecovery	0	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	388000	USD
CY2020	rwt	Availableforsale Securities Gross Realized Gain Loss On Sales And Calls AvailableforsaleSecuritiesGrossRealizedGainLossOnSalesAndCalls	4640000	USD
CY2019	rwt	Availableforsale Securities Gross Realized Gain Loss On Sales And Calls AvailableforsaleSecuritiesGrossRealizedGainLossOnSalesAndCalls	23821000	USD
CY2018	rwt	Availableforsale Securities Gross Realized Gain Loss On Sales And Calls AvailableforsaleSecuritiesGrossRealizedGainLossOnSalesAndCalls	27041000	USD
CY2020Q4	us-gaap	Other Investments OtherInvestments	348175000	USD
CY2019Q4	us-gaap	Other Investments OtherInvestments	358130000	USD
CY2018	rwt	Number Of Partnerships Consolidated NumberOfPartnershipsConsolidated	2	partnership
CY2020	rwt	Commitment To Fund Partnership CommitmentToFundPartnership	94000000	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	37166000	USD
CY2020Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	11346407000	USD
CY2019Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-127723000	USD
CY2019Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	13589356000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	4203000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	4901000	USD
CY2020Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	43176000	USD
CY2019Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	23330000	USD
CY2020Q4	us-gaap	Interest Receivable InterestReceivable	39445000	USD
CY2019Q4	us-gaap	Interest Receivable InterestReceivable	71058000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	15012000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	11866000	USD
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	8413000	USD
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	9462000	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	5000000	USD
CY2019Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	43393000	USD
CY2020Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	4758000	USD
CY2019Q4	us-gaap	Margin Deposit Assets MarginDepositAssets	209776000	USD
CY2020Q4	us-gaap	Pledged Assets Separately Reported Other Assets Pledged As Collateral At Fair Value PledgedAssetsSeparatelyReportedOtherAssetsPledgedAsCollateralAtFairValue	1177000	USD
CY2019Q4	us-gaap	Pledged Assets Separately Reported Other Assets Pledged As Collateral At Fair Value PledgedAssetsSeparatelyReportedOtherAssetsPledgedAsCollateralAtFairValue	32945000	USD
CY2020Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	9404000	USD
CY2019Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	12590000	USD
CY2020Q4	us-gaap	Other Assets OtherAssets	130588000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	419321000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	11000000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	6000000	USD
CY2020Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	34858000	USD
CY2019Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	60655000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current And Noncurrent EmployeeRelatedLiabilitiesCurrentAndNoncurrent	24393000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current And Noncurrent EmployeeRelatedLiabilitiesCurrentAndNoncurrent	33888000	USD
CY2020Q4	us-gaap	Minority Interest In Limited Partnerships MinorityInterestInLimitedPartnerships	16941000	USD
CY2019Q4	us-gaap	Minority Interest In Limited Partnerships MinorityInterestInLimitedPartnerships	13189000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	16687000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	13443000	USD
CY2020Q4	rwt	Margin Payable MarginPayable	14728000	USD
CY2019Q4	rwt	Margin Payable MarginPayable	1700000	USD
CY2020Q4	rwt	Business Combination Deferred Consideration BusinessCombinationDeferredConsideration	14579000	USD
CY2019Q4	rwt	Business Combination Deferred Consideration BusinessCombinationDeferredConsideration	0	USD
CY2020Q4	us-gaap	Guaranty Liabilities GuarantyLiabilities	10039000	USD
CY2019Q4	us-gaap	Guaranty Liabilities GuarantyLiabilities	14009000	USD
CY2020Q4	rwt	Mortgage Loan On Real Estate Repurchase Reserve MortgageLoanOnRealEstateRepurchaseReserve	8631000	USD
CY2019Q4	rwt	Mortgage Loan On Real Estate Repurchase Reserve MortgageLoanOnRealEstateRepurchaseReserve	4268000	USD
CY2020Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	6455000	USD
CY2019Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	5468000	USD
CY2020Q4	rwt	Bridge Loan Holdback BridgeLoanHoldback	5708000	USD
CY2019Q4	rwt	Bridge Loan Holdback BridgeLoanHoldback	10682000	USD
CY2020Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	5614000	USD
CY2019Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	5268000	USD
CY2020Q4	rwt	Accrued Operating Expenses AccruedOperatingExpenses	5509000	USD
CY2019Q4	rwt	Accrued Operating Expenses AccruedOperatingExpenses	4358000	USD
CY2020Q4	us-gaap	Business Combination Contingent Consideration Liability BusinessCombinationContingentConsiderationLiability	0	USD
CY2019Q4	us-gaap	Business Combination Contingent Consideration Liability BusinessCombinationContingentConsiderationLiability	28484000	USD
CY2020Q4	rwt	Other Liabilities Miscellaneous OtherLiabilitiesMiscellaneous	15198000	USD
CY2019Q4	rwt	Other Liabilities Miscellaneous OtherLiabilitiesMiscellaneous	11481000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	179340000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current And Noncurrent AccruedLiabilitiesCurrentAndNoncurrent	206893000	USD
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	9462000	USD
CY2020	us-gaap	Real Estate Acquisitions Through Foreclosures RealEstateAcquisitionsThroughForeclosures	14119000	USD
CY2020	us-gaap	Real Estate Cost Of Real Estate Sold RealEstateCostOfRealEstateSold	14622000	USD
CY2020	us-gaap	Principal Investment Gains Losses PrincipalInvestmentGainsLosses	-546000	USD
CY2020Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	8413000	USD
CY2020Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	17	asset
CY2019Q4	us-gaap	Number Of Real Estate Properties NumberOfRealEstateProperties	13	asset
CY2018	rwt	Number Of Partnerships Consolidated NumberOfPartnershipsConsolidated	2	partnership
CY2020Q4	us-gaap	Minority Interest In Limited Partnerships MinorityInterestInLimitedPartnerships	17000000	USD
CY2020	us-gaap	Net Income Loss Allocated To Limited Partners NetIncomeLossAllocatedToLimitedPartners	-200000	USD
CY2019	us-gaap	Net Income Loss Allocated To Limited Partners NetIncomeLossAllocatedToLimitedPartners	1000000	USD
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	522609000	USD
CY2019Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	2329145000	USD
CY2020Q4	us-gaap	Pledged Assets Separately Reported Securities Pledged As Collateral At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue	114553000	USD
CY2019Q4	us-gaap	Pledged Assets Separately Reported Securities Pledged As Collateral At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue	1491986000	USD
CY2020Q4	rwt	Other Assets Pledged As Collateral OtherAssetsPledgedAsCollateral	315000	USD
CY2019Q4	rwt	Other Assets Pledged As Collateral OtherAssetsPledgedAsCollateral	16252000	USD
CY2020Q4	rwt	Shortterm Debt Pledgedas Collateral ShorttermDebtPledgedasCollateral	398252000	USD
CY2019Q4	rwt	Shortterm Debt Pledgedas Collateral ShorttermDebtPledgedasCollateral	2698366000	USD
CY2020	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	1190000000	USD
CY2019	us-gaap	Shortterm Debt Average Outstanding Amount ShorttermDebtAverageOutstandingAmount	1970000000	USD
CY2020Q4	us-gaap	Interest Payable Current InterestPayableCurrent	1000000	USD
CY2019Q4	us-gaap	Interest Payable Current InterestPayableCurrent	6000000	USD
CY2020Q4	us-gaap	Line Of Credit Facility Current Borrowing Capacity LineOfCreditFacilityCurrentBorrowingCapacity	10000000	USD
CY2020Q4	us-gaap	Financial Instruments Owned And Pledged As Collateral At Fair Value FinancialInstrumentsOwnedAndPledgedAsCollateralAtFairValue	2000000	USD
CY2019Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2020Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	522609000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	21793000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	33686000	USD
CY2016Q1	rwt	Federal Home Loan Bank Transition Period Subsidiary To Member Of Fhlb FederalHomeLoanBankTransitionPeriodSubsidiaryToMemberOfFHLB	P5Y
CY2020	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	2000000000.0	USD
CY2020Q4	us-gaap	Federal Home Loan Bank Stock FederalHomeLoanBankStock	5000000	USD
CY2020Q4	rwt	Lessee Number Of Leases LesseeNumberOfLeases	8	lease
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	20000000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	4000000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	3000000	USD
CY2018	us-gaap	Operating Lease Cost OperatingLeaseCost	2000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	3469000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	3301000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	2813000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	2231000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1983000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	6128000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	19925000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	3238000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	16687000	USD
CY2020Q4	us-gaap	Leasehold Improvements Gross LeaseholdImprovementsGross	3000000	USD
CY2020	rwt	Amortization Of Leasehold Improvement AmortizationOfLeaseholdImprovement	500000	USD
CY2019	rwt	Amortization Of Leasehold Improvement AmortizationOfLeaseholdImprovement	400000	USD
CY2018	rwt	Amortization Of Leasehold Improvement AmortizationOfLeaseholdImprovement	200000	USD
CY2020	rwt	Lessee Operating Lease Numberof New Leases LesseeOperatingLeaseNumberofNewLeases	4	lease
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	17000000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	15000000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.049
CY2019Q3	rwt	Commitment To Fund Partnership Number Of Partnerships CommitmentToFundPartnershipNumberOfPartnerships	2	partnership
CY2020Q4	us-gaap	Guaranty Liabilities GuarantyLiabilities	10000000	USD
CY2020Q4	rwt	Guarantee Obligation Credit Reserve GuaranteeObligationCreditReserve	5000000	USD
CY2020Q4	rwt	Special Purpose Entities Assets SpecialPurposeEntitiesAssets	46000000	USD
CY2019Q4	rwt	Special Purpose Entities Assets SpecialPurposeEntitiesAssets	48000000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.63
CY2020Q4	rwt	Special Purpose Entities Liabilities SpecialPurposeEntitiesLiabilities	10000000	USD
CY2019	rwt	Mortgage Loans On Real Estate Loans Repurchased MortgageLoansOnRealEstateLoansRepurchased	0	USD
CY2018	rwt	Mortgage Loans On Real Estate Loans Repurchased MortgageLoansOnRealEstateLoansRepurchased	0	USD
CY2019Q4	rwt	Special Purpose Entities Liabilities SpecialPurposeEntitiesLiabilities	14000000	USD
CY2020Q4	rwt	Mortgage Loan On Real Estate Repurchase Reserve MortgageLoanOnRealEstateRepurchaseReserve	9000000	USD
CY2019Q4	rwt	Mortgage Loan On Real Estate Repurchase Reserve MortgageLoanOnRealEstateRepurchaseReserve	4000000	USD
CY2020	rwt	Mortgage Loans On Real Estate Repurchase Requests MortgageLoansOnRealEstateRepurchaseRequests	10	repurchase_request
CY2019	rwt	Mortgage Loans On Real Estate Repurchase Requests MortgageLoansOnRealEstateRepurchaseRequests	15	repurchase_request
CY2020	rwt	Mortgage Loans On Real Estate Number Of Loans Repurchased MortgageLoansOnRealEstateNumberOfLoansRepurchased	1	loan
CY2019	rwt	Mortgage Loans On Real Estate Number Of Loans Repurchased MortgageLoansOnRealEstateNumberOfLoansRepurchased	0	loan
CY2018	rwt	Mortgage Loans On Real Estate Number Of Loans Repurchased MortgageLoansOnRealEstateNumberOfLoansRepurchased	2	loan
CY2020	rwt	Mortgage Loans On Real Estate Repurchase Provision MortgageLoansOnRealEstateRepurchaseProvision	4000000	USD
CY2019	rwt	Mortgage Loans On Real Estate Repurchase Provision MortgageLoansOnRealEstateRepurchaseProvision	100000	USD
CY2018	rwt	Mortgage Loans On Real Estate Repurchase Provision MortgageLoansOnRealEstateRepurchaseProvision	700000	USD
CY2020	rwt	Mortgage Loans On Real Estate Loans Repurchased MortgageLoansOnRealEstateLoansRepurchased	100000	USD
CY2020Q3	us-gaap	Litigation Reserve LitigationReserve	2000000	USD
CY2020Q2	us-gaap	Loss Contingency Damages Sought Value LossContingencyDamagesSoughtValue	2000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	119600000	USD
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	78724912	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-5.12
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.47
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-581847000	USD
CY2020	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	1990000	USD
CY2019	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	4797000	USD
CY2019	rwt	Stock Issued During Period Value Dividend Reinvestment And Stock Purchase Plan StockIssuedDuringPeriodValueDividendReinvestmentAndStockPurchasePlan	6000000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-581847000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	169183000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	119600000	USD
CY2018	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	3754000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-583837000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	164386000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	115846000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	113935605	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	101120744	shares
CY2019	us-gaap	Net Income Loss NetIncomeLoss	169183000	USD
CY2020	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	1990000	USD
CY2019	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	5273000	USD
CY2018	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Diluted ParticipatingSecuritiesDistributedAndUndistributedEarningsLossDiluted	4283000	USD
CY2020	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	0	USD
CY2019	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	36212000	USD
CY2018	us-gaap	Interest On Convertible Debt Net Of Tax InterestOnConvertibleDebtNetOfTax	32653000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-583837000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	200122000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	147970000	USD
CY2020	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	113935605	shares
CY2019	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	101147225	shares
CY2018	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	78724912	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1037000	USD
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	251100	shares
CY2018	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	189120	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	35382269	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	31113738	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	113935605	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	136780594	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	110027770	shares
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-5.12
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.46
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.34
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	28000000	USD
CY2019Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	32328000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	20800000	USD
CY2020	rwt	Sharebased Compensation Arrangementby Sharebased Payment Award Equity Instruments Otherthan Options Valuation Adjustment SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsValuationAdjustment	-7352000	USD
CY2020	rwt	Sharebased Compensation Arrangement By Sharebased Payment Award Compensation Cost Forfeitures SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCostForfeitures	8075000	USD
CY2020	rwt	Allocated Sharebased Compensation Expense Including Restructuring AllocatedSharebasedCompensationExpenseIncludingRestructuring	10037000	USD
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	27664000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y
CY2020	rwt	Share Based Payment Arrangement Expense Adjustment For Change In Estimates ShareBasedPaymentArrangementExpenseAdjustmentForChangeInEstimates	1000000	USD
CY2020Q4	rwt	Employee Stock Purchase Plan Number Of Shares Authorized EmployeeStockPurchasePlanNumberOfSharesAuthorized	600000	shares
CY2020	rwt	Employee Stock Purchase Plan Number Of Shares Purchased By Employee EmployeeStockPurchasePlanNumberOfSharesPurchasedByEmployee	489886	shares
CY2019Q4	us-gaap	Employee Stock Ownership Plan Esop Repurchase Obligation Amount EmployeeStockOwnershipPlanESOPRepurchaseObligationAmount	4000	USD
CY2018Q4	us-gaap	Employee Stock Ownership Plan Esop Repurchase Obligation Amount EmployeeStockOwnershipPlanESOPRepurchaseObligationAmount	6000	USD
CY2018Q4	us-gaap	Employee Stock Ownership Plan Esop Repurchase Obligation Amount EmployeeStockOwnershipPlanESOPRepurchaseObligationAmount	6000	USD
CY2017Q4	us-gaap	Employee Stock Ownership Plan Esop Repurchase Obligation Amount EmployeeStockOwnershipPlanESOPRepurchaseObligationAmount	4000	USD
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	347000	USD
CY2019	rwt	Mortgage Banking Activities Net MortgageBankingActivitiesNet	87266000	USD
CY2018	rwt	Mortgage Banking Activities Net MortgageBankingActivitiesNet	59566000	USD
CY2019	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	524000	USD
CY2018	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	375000	USD
CY2020	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	334000	USD
CY2019	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	526000	USD
CY2018	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	373000	USD
CY2020Q4	us-gaap	Employee Stock Ownership Plan Esop Repurchase Obligation Amount EmployeeStockOwnershipPlanESOPRepurchaseObligationAmount	17000	USD
CY2019Q4	us-gaap	Employee Stock Ownership Plan Esop Repurchase Obligation Amount EmployeeStockOwnershipPlanESOPRepurchaseObligationAmount	4000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized	200000	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	99281	shares
CY2020	rwt	Mortgage Banking Activities Net MortgageBankingActivitiesNet	78472000	USD
CY2019	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	4400000	USD
CY2020	rwt	Fee Income Risk Sharing Agreement FeeIncomeRiskSharingAgreement	4367000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	618000	USD
CY2020	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	2912000	USD
CY2020	rwt	Mortgage Servicing Rights Income Loss Net MortgageServicingRightsIncomeLossNet	-9694000	USD
CY2019	rwt	Mortgage Servicing Rights Income Loss Net MortgageServicingRightsIncomeLossNet	3521000	USD
CY2018	rwt	Mortgage Servicing Rights Income Loss Net MortgageServicingRightsIncomeLossNet	7076000	USD
CY2019	rwt	Fee Income Risk Sharing Agreement FeeIncomeRiskSharingAgreement	3522000	USD
CY2018	rwt	Fee Income Risk Sharing Agreement FeeIncomeRiskSharingAgreement	3613000	USD
CY2020	rwt	Fhlbc Capital Stock Dividend FHLBCCapitalStockDividend	1229000	USD
CY2019	rwt	Fhlbc Capital Stock Dividend FHLBCCapitalStockDividend	2169000	USD
CY2018	rwt	Fhlbc Capital Stock Dividend FHLBCCapitalStockDividend	1763000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1405000	USD
CY2018	us-gaap	Property Management Fee Revenue PropertyManagementFeeRevenue	0	USD
CY2020	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	0	USD
CY2019	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	2441000	USD
CY2018	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	0	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4337000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1799000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	0	USD
CY2020	us-gaap	Other Income OtherIncome	4188000	USD
CY2019	us-gaap	Other Income OtherIncome	19257000	USD
CY2018	us-gaap	Other Income OtherIncome	13070000	USD
CY2020	rwt	Fixed Compensation Expense FixedCompensationExpense	46689000	USD
CY2019	rwt	Acquisition Related Sharebased Payment Arrangement Expense AcquisitionRelatedSharebasedPaymentArrangementExpense	1010000	USD
CY2018	rwt	Acquisition Related Sharebased Payment Arrangement Expense AcquisitionRelatedSharebasedPaymentArrangementExpense	0	USD
CY2019	rwt	Fixed Compensation Expense FixedCompensationExpense	39639000	USD
CY2018	rwt	Fixed Compensation Expense FixedCompensationExpense	24445000	USD
CY2020	rwt	Variable Compensation Expense VariableCompensationExpense	14116000	USD
CY2019	rwt	Variable Compensation Expense VariableCompensationExpense	21728000	USD
CY2018	rwt	Variable Compensation Expense VariableCompensationExpense	14589000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	12439000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	13402000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	12388000	USD
CY2020	rwt	Acquisition Related Sharebased Payment Arrangement Expense AcquisitionRelatedSharebasedPaymentArrangementExpense	4848000	USD
CY2020	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	11728000	USD
CY2019	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	10746000	USD
CY2018	us-gaap	Communications And Information Technology CommunicationsAndInformationTechnology	7451000	USD
CY2020	rwt	Office Costs OfficeCosts	7794000	USD
CY2019	rwt	Office Costs OfficeCosts	6310000	USD
CY2018	rwt	Office Costs OfficeCosts	4705000	USD
CY2020	us-gaap	Professional Fees ProfessionalFees	7928000	USD
CY2019	us-gaap	Professional Fees ProfessionalFees	5450000	USD
CY2018	us-gaap	Professional Fees ProfessionalFees	5529000	USD
CY2020	us-gaap	Other General Expense OtherGeneralExpense	2829000	USD
CY2019	us-gaap	Other General Expense OtherGeneralExpense	2351000	USD
CY2018	us-gaap	Other General Expense OtherGeneralExpense	1955000	USD
CY2020	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	6833000	USD
CY2019	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	8101000	USD
CY2018	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	4236000	USD
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	115204000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	108737000	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	75298000	USD
CY2020	rwt	Commissions On Loan Acquisitions CommissionsOnLoanAcquisitions	4321000	USD
CY2019	rwt	Commissions On Loan Acquisitions CommissionsOnLoanAcquisitions	3833000	USD
CY2018	rwt	Commissions On Loan Acquisitions CommissionsOnLoanAcquisitions	78000	USD
CY2020	rwt	Underwriting Costs Associated With Loan Acquisitions UnderwritingCostsAssociatedWithLoanAcquisitions	4945000	USD
CY2019	rwt	Underwriting Costs Associated With Loan Acquisitions UnderwritingCostsAssociatedWithLoanAcquisitions	4767000	USD
CY2018	rwt	Underwriting Costs Associated With Loan Acquisitions UnderwritingCostsAssociatedWithLoanAcquisitions	5140000	USD
CY2020	rwt	Transfer And Hold Costs Associated With Loan Acquisitions TransferAndHoldCostsAssociatedWithLoanAcquisitions	1757000	USD
CY2019	rwt	Transfer And Hold Costs Associated With Loan Acquisitions TransferAndHoldCostsAssociatedWithLoanAcquisitions	1335000	USD
CY2018	rwt	Transfer And Hold Costs Associated With Loan Acquisitions TransferAndHoldCostsAssociatedWithLoanAcquisitions	2266000	USD
CY2020	rwt	Loan Acquisition Costs LoanAcquisitionCosts	11023000	USD
CY2019	rwt	Loan Acquisition Costs LoanAcquisitionCosts	9935000	USD
CY2018	rwt	Loan Acquisition Costs LoanAcquisitionCosts	7484000	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	88675000	USD
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CY2019	rwt	Amortizationof Purchase Related Intangible Assets AmortizationofPurchaseRelatedIntangibleAssets	8696000	USD
CY2018	rwt	Amortizationof Purchase Related Intangible Assets AmortizationofPurchaseRelatedIntangibleAssets	177000	USD
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	3218000	USD
CY2018	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
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CY2019	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1108000	USD
CY2018	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	19000	USD
CY2020	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	108785000	USD
CY2019	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	13022000	USD
CY2018	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	196000	USD
CY2020	us-gaap	Operating Expenses OperatingExpenses	235012000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	131694000	USD
CY2018	us-gaap	Operating Expenses OperatingExpenses	82978000	USD
CY2020	us-gaap	Deferred Compensation Arrangement With Individual Compensation Expense DeferredCompensationArrangementWithIndividualCompensationExpense	5000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	103334000	USD
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CY2020Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	23487000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	0	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	82000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Domestic DeferredTaxAssetsOperatingLossCarryforwardsDomestic	82000	USD
CY2020Q4	rwt	Deferred Tax Assets Real Estate Assets DeferredTaxAssetsRealEstateAssets	2948000	USD
CY2019Q4	rwt	Deferred Tax Assets Real Estate Assets DeferredTaxAssetsRealEstateAssets	676000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	3324000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	1930000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	23231000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	2739000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1914000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1749000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other Comprehensive Loss DeferredTaxAssetsOtherComprehensiveLoss	124000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other Comprehensive Loss DeferredTaxAssetsOtherComprehensiveLoss	0	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	158444000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	105730000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	2458000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	13783000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	3867000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	42000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	6325000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	13825000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	151248000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	97057000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	871000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	5152000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1598000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	12036000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	11387000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-182000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	897000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	820000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1416000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	12933000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	12207000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-6024000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-3976000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1419000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1517000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	300000	USD
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CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-5493000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1119000	USD
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CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7440000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11088000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
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CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
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CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.086
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.086
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Deductions EffectiveIncomeTaxRateReconciliationDeductions	0.196
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Deductions EffectiveIncomeTaxRateReconciliationDeductions	0.021
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Deductions EffectiveIncomeTaxRateReconciliationDeductions	0.017
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.092
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CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Cuts And Jobs Act Of2017 Percent EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017Percent	0
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	123911000	USD
CY2020	rwt	Mortgage Banking Activities Net MortgageBankingActivitiesNet	78472000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.008
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.042
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.085
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CY2020	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	571916000	USD
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CY2020	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-588438000	USD
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CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	108737000	USD
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CY2019	us-gaap	Adjustment For Amortization AdjustmentForAmortization	-3361000	USD
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CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	139678000	USD
CY2018	rwt	Mortgage Banking Activities Net MortgageBankingActivitiesNet	59566000	USD
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CY2018	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	13070000	USD
CY2018	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	27041000	USD
CY2018	us-gaap	Noninterest Income NoninterestIncome	73988000	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	75298000	USD
CY2018	rwt	Loan Acquisition Costs LoanAcquisitionCosts	7484000	USD
CY2018	us-gaap	Other Expenses OtherExpenses	196000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	11088000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	119600000	USD
CY2018	us-gaap	Adjustment For Amortization AdjustmentForAmortization	12379000	USD
CY2020Q4	us-gaap	Marketable Securities MarketableSecurities	344125000	USD
CY2020Q4	us-gaap	Other Investments OtherInvestments	348175000	USD
CY2020Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	56865000	USD
CY2020Q4	us-gaap	Assets Assets	10355066000	USD
CY2019Q4	us-gaap	Marketable Securities MarketableSecurities	1099874000	USD
CY2019Q4	us-gaap	Other Investments OtherInvestments	358130000	USD
CY2019Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	161464000	USD
CY2019Q4	us-gaap	Assets Assets	17995440000	USD
CY2019Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	15630117000	USD
CY2018Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	9540598000	USD
CY2017Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	5115210000	USD
CY2020	us-gaap	Mortgage Loans On Real Estate New Mortgage Loans MortgageLoansOnRealEstateNewMortgageLoans	5914728000	USD
CY2019	us-gaap	Mortgage Loans On Real Estate New Mortgage Loans MortgageLoansOnRealEstateNewMortgageLoans	12911261000	USD
CY2018	us-gaap	Mortgage Loans On Real Estate New Mortgage Loans MortgageLoansOnRealEstateNewMortgageLoans	10607896000	USD
CY2020	us-gaap	Mortgage Loans On Real Estate Cost Of Mortgages Sold MortgageLoansOnRealEstateCostOfMortgagesSold	6398690000	USD
CY2019	us-gaap	Mortgage Loans On Real Estate Cost Of Mortgages Sold MortgageLoansOnRealEstateCostOfMortgagesSold	5218797000	USD
CY2018	us-gaap	Mortgage Loans On Real Estate Cost Of Mortgages Sold MortgageLoansOnRealEstateCostOfMortgagesSold	5426304000	USD
CY2020	srt	Mortgage Loans On Real Estate Collections Of Principal MortgageLoansOnRealEstateCollectionsOfPrincipal	2313143000	USD
CY2019	srt	Mortgage Loans On Real Estate Collections Of Principal MortgageLoansOnRealEstateCollectionsOfPrincipal	1851278000	USD
CY2018	srt	Mortgage Loans On Real Estate Collections Of Principal MortgageLoansOnRealEstateCollectionsOfPrincipal	843984000	USD
CY2020	rwt	Mortgage Loanson Real Estate Transfers To Real Estate Other MortgageLoansonRealEstateTransfersToRealEstateOther	14104000	USD
CY2019	rwt	Mortgage Loanson Real Estate Transfers To Real Estate Other MortgageLoansonRealEstateTransfersToRealEstateOther	7552000	USD
CY2018	rwt	Mortgage Loanson Real Estate Transfers To Real Estate Other MortgageLoansonRealEstateTransfersToRealEstateOther	4104000	USD
CY2020	rwt	Mortgage Loans On Real Estate Deconsolidation Adjustments MortgageLoansOnRealEstateDeconsolidationAdjustments	3849779000	USD
CY2019	rwt	Mortgage Loans On Real Estate Deconsolidation Adjustments MortgageLoansOnRealEstateDeconsolidationAdjustments	0	USD
CY2018	rwt	Mortgage Loans On Real Estate Deconsolidation Adjustments MortgageLoansOnRealEstateDeconsolidationAdjustments	0	USD
CY2020	rwt	Mortgage Loanson Real Estate Unrealized Gain Loss On Change In Fair Value MortgageLoansonRealEstateUnrealizedGainLossOnChangeInFairValue	-91503000	USD
CY2019	rwt	Mortgage Loanson Real Estate Unrealized Gain Loss On Change In Fair Value MortgageLoansonRealEstateUnrealizedGainLossOnChangeInFairValue	255885000	USD
CY2018	rwt	Mortgage Loanson Real Estate Unrealized Gain Loss On Change In Fair Value MortgageLoansonRealEstateUnrealizedGainLossOnChangeInFairValue	91884000	USD
CY2020Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	8877626000	USD
CY2019Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	15630117000	USD
CY2018Q4	us-gaap	Mortgage Loans On Real Estate MortgageLoansOnRealEstate	9540598000	USD

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$RWT
REDWOOD TRUST INC Stock $rwt

2019 Q4 Form 10-K Financial Statement

#000093023621000007 Filed on February 26, 2021

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$RWT REDWOOD TRUST INC Stock $rwt

2019 Q4 Form 10-K Financial Statement

#000093023621000007 Filed on February 26, 2021

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Files In Submission

$RWT
REDWOOD TRUST INC Stock $rwt