Annual report pursuant to Section 13 and 15(d)

Fair Value, Measurement Inputs, Disclosure (Details)

v2.4.1.9
Fair Value, Measurement Inputs, Disclosure (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Trading Securities Categorized as Level 1 Assets 100.00%two_TradingSecuritiesCategorizedAsLevel1Assets    
Avaialble-for-sale Securities Categorized as Level 2 Assets 100.00%two_AvaialbleForSaleSecuritiesCategorizedAsLevel2Assets    
Assets Reported at Fair Value, Available-for-sale Securities 73.70%two_AssetsReportedAtFairValueAvailableForSaleSecurities    
Assets Reported at Fair Value, Trading Securities 10.30%two_AssetsReportedAtFairValueTradingSecurities    
Mortgage Loans Held-for-sale Categorized as Level 2 Assets 93.40%two_MortgageLoansHeldForSaleCategorizedAsLevel2Assets    
Mortgage Loans Held-for-sale Categorized as Level 3 Assets 6.60%two_MortgageLoansHeldForSaleCategorizedAsLevel3Assets    
Mortgage Loans Held-for-investment Categorized as Level 2 Assets 100.00%two_MortgageLoansHeldForInvestmentCategorizedAsLevel2Assets    
Mortgage Servicing Rights Categorized as Level 3 Assets 100.00%two_MortgageServicingRightsCategorizedAsLevel3Assets    
Interest Rate Swaps, Swaptions and Credit Default Swaps Categorized as Level 2 Assets (Liabilities) 100.00%two_InterestRateSwapsSwaptionsAndCreditDefaultSwapsCategorizedAsLevel2AssetsLiabilities    
Inverse Interest-only Securities Categorized as Level 2 Assets 100.00%two_InverseInterestOnlySecuritiesCategorizedAsLevel2Assets    
Agency To-be-Announced Securities Categorized as Level 1 Assets (Liabilities) 100.00%two_AgencyToBeAnnouncedSecuritiesCategoizedAsLevel1AssetsLiabilities    
Derivative, Notional Amount $ 48,115,523invest_DerivativeNotionalAmount $ 37,366,610invest_DerivativeNotionalAmount $ 22,377,656invest_DerivativeNotionalAmount
Forward Purchase Commitments Categorized as Level 2 Assets (Liabilities) 100.00%two_ForwardPurchaseCommitmentsCategorizedasLevel2AssetsLiabilities    
Collateralized Borrowings in Securitization Trust Categorized as Level 2 Liabilities 100.00%two_CollateralizedBorrowingsInSecuritizationTrustCategorizedAsLevel2Liabilities    
Available-for-sale securities 14,341,102us-gaap_AvailableForSaleSecurities 12,256,727us-gaap_AvailableForSaleSecurities  
Trading securities 1,997,656us-gaap_TradingSecurities 1,000,180us-gaap_TradingSecurities  
Mortgage servicing rights 452,006us-gaap_ServicingAssetAtFairValueAmount 514,402us-gaap_ServicingAssetAtFairValueAmount 0us-gaap_ServicingAssetAtFairValueAmount
Forward Purchase Commitments [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative, Notional Amount 554,838invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_LoanPurchaseCommitmentsMember
12,063invest_DerivativeNotionalAmount
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= us-gaap_LoanPurchaseCommitmentsMember
56,865invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_LoanPurchaseCommitmentsMember
Derivative, Fair Value, Net 1,297us-gaap_DerivativeFairValueOfDerivativeNet
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= us-gaap_LoanPurchaseCommitmentsMember
0us-gaap_DerivativeFairValueOfDerivativeNet
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= us-gaap_LoanPurchaseCommitmentsMember
 
Fair Value, Measurements, Recurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Available-for-sale securities 14,341,102us-gaap_AvailableForSaleSecurities
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= us-gaap_FairValueMeasurementsRecurringMember
12,256,727us-gaap_AvailableForSaleSecurities
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
 
Trading securities 1,997,656us-gaap_TradingSecurities
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= us-gaap_FairValueMeasurementsRecurringMember
1,000,180us-gaap_TradingSecurities
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= us-gaap_FairValueMeasurementsRecurringMember
 
Mortgage loans held-for-sale 535,712us-gaap_MortgagesHeldForSaleFairValueDisclosure
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= us-gaap_FairValueMeasurementsRecurringMember
544,581us-gaap_MortgagesHeldForSaleFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
 
Mortgage loans held-for-investment in securitization trusts 1,744,746us-gaap_LoansReceivableFairValueDisclosure
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= us-gaap_FairValueMeasurementsRecurringMember
792,390us-gaap_LoansReceivableFairValueDisclosure
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= us-gaap_FairValueMeasurementsRecurringMember
 
Mortgage servicing rights 452,006us-gaap_ServicingAssetAtFairValueAmount
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514,402us-gaap_ServicingAssetAtFairValueAmount
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= us-gaap_FairValueMeasurementsRecurringMember
 
Derivative assets 380,791us-gaap_DerivativeAssets
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= us-gaap_FairValueMeasurementsRecurringMember
549,859us-gaap_DerivativeAssets
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= us-gaap_FairValueMeasurementsRecurringMember
 
Assets, Fair Value Disclosure 19,452,013us-gaap_AssetsFairValueDisclosure
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= us-gaap_FairValueMeasurementsRecurringMember
15,658,139us-gaap_AssetsFairValueDisclosure
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= us-gaap_FairValueMeasurementsRecurringMember
 
Collateralized borrowings in securitization trusts 1,209,663us-gaap_DebtInstrumentFairValue
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
639,731us-gaap_DebtInstrumentFairValue
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
 
Derivative liabilities 90,233us-gaap_DerivativeLiabilities
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
22,081us-gaap_DerivativeLiabilities
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
 
Financial and Nonfinancial Liabilities, Fair Value Disclosure 1,299,896us-gaap_LiabilitiesFairValueDisclosure
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= us-gaap_FairValueMeasurementsRecurringMember
661,812us-gaap_LiabilitiesFairValueDisclosure
/ us-gaap_FairValueByMeasurementFrequencyAxis
= us-gaap_FairValueMeasurementsRecurringMember
 
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Available-for-sale securities 0us-gaap_AvailableForSaleSecurities
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0us-gaap_AvailableForSaleSecurities
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Trading securities 1,997,656us-gaap_TradingSecurities
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= us-gaap_FairValueMeasurementsRecurringMember
1,000,180us-gaap_TradingSecurities
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Mortgage loans held-for-sale 0us-gaap_MortgagesHeldForSaleFairValueDisclosure
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Mortgage loans held-for-investment in securitization trusts 0us-gaap_LoansReceivableFairValueDisclosure
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Mortgage servicing rights 0us-gaap_ServicingAssetAtFairValueAmount
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Derivative assets 10,350us-gaap_DerivativeAssets
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33,425us-gaap_DerivativeAssets
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= us-gaap_FairValueInputsLevel1Member
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Assets, Fair Value Disclosure 2,008,006us-gaap_AssetsFairValueDisclosure
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1,033,605us-gaap_AssetsFairValueDisclosure
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Collateralized borrowings in securitization trusts 0us-gaap_DebtInstrumentFairValue
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Derivative liabilities 17,687us-gaap_DerivativeLiabilities
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125us-gaap_DerivativeLiabilities
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Financial and Nonfinancial Liabilities, Fair Value Disclosure 17,687us-gaap_LiabilitiesFairValueDisclosure
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125us-gaap_LiabilitiesFairValueDisclosure
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Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Available-for-sale securities 14,341,102us-gaap_AvailableForSaleSecurities
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12,256,727us-gaap_AvailableForSaleSecurities
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Trading securities 0us-gaap_TradingSecurities
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0us-gaap_TradingSecurities
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Mortgage loans held-for-sale 500,159us-gaap_MortgagesHeldForSaleFairValueDisclosure
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119,855us-gaap_MortgagesHeldForSaleFairValueDisclosure
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Mortgage loans held-for-investment in securitization trusts 1,744,746us-gaap_LoansReceivableFairValueDisclosure
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792,390us-gaap_LoansReceivableFairValueDisclosure
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Mortgage servicing rights 0us-gaap_ServicingAssetAtFairValueAmount
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0us-gaap_ServicingAssetAtFairValueAmount
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Derivative assets 370,441us-gaap_DerivativeAssets
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516,434us-gaap_DerivativeAssets
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Assets, Fair Value Disclosure 16,956,448us-gaap_AssetsFairValueDisclosure
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13,685,406us-gaap_AssetsFairValueDisclosure
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Collateralized borrowings in securitization trusts 1,209,663us-gaap_DebtInstrumentFairValue
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639,731us-gaap_DebtInstrumentFairValue
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Derivative liabilities 72,546us-gaap_DerivativeLiabilities
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21,956us-gaap_DerivativeLiabilities
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Financial and Nonfinancial Liabilities, Fair Value Disclosure 1,282,209us-gaap_LiabilitiesFairValueDisclosure
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661,687us-gaap_LiabilitiesFairValueDisclosure
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Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Available-for-sale securities 0us-gaap_AvailableForSaleSecurities
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Trading securities 0us-gaap_TradingSecurities
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Mortgage loans held-for-sale 35,553us-gaap_MortgagesHeldForSaleFairValueDisclosure
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424,726us-gaap_MortgagesHeldForSaleFairValueDisclosure
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Mortgage loans held-for-investment in securitization trusts 0us-gaap_LoansReceivableFairValueDisclosure
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Mortgage servicing rights 452,006us-gaap_ServicingAssetAtFairValueAmount
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514,402us-gaap_ServicingAssetAtFairValueAmount
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Derivative assets 0us-gaap_DerivativeAssets
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Assets, Fair Value Disclosure 487,559us-gaap_AssetsFairValueDisclosure
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Collateralized borrowings in securitization trusts 0us-gaap_DebtInstrumentFairValue
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Derivative liabilities 0us-gaap_DerivativeLiabilities
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Financial and Nonfinancial Liabilities, Fair Value Disclosure $ 0us-gaap_LiabilitiesFairValueDisclosure
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$ 0us-gaap_LiabilitiesFairValueDisclosure
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