Quarterly report pursuant to Section 13 or 15(d)

Fair Value, Measurement Inputs, Disclosure (Details)

v2.4.1.9
Fair Value, Measurement Inputs, Disclosure (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Trading Securities Categorized as Level 1 Assets 100.00%two_TradingSecuritiesCategorizedAsLevel1Assets      
Available-for-sale Securities Categorized as Level 2 Assets 100.00%two_AvaialbleForSaleSecuritiesCategorizedAsLevel2Assets      
Assets Reported at Fair Value, Available-for-sale Securities 72.20%two_AssetsReportedAtFairValueAvailableForSaleSecurities      
Assets Reported at Fair Value, Trading Securities 10.10%two_AssetsReportedAtFairValueTradingSecurities      
Mortgage Loans Held-for-sale Categorized as Level 2 Assets 87.70%two_ResidentialMortgageLoansHeldforsaleCategorizedasLevel2Assets      
Mortgage Loans Held-for-sale Categorized as Level 3 Assets 12.30%two_ResidentialMortgageLoansHeldforsaleCategorizedasLevel3Assets      
Mortgage Loans Held-for-investment Categorized as Level 2 Assets 100.00%two_ResidentialMortgageLoansHeldforinvestmentCategorizedasLevel2Assets      
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_AgencyTobeAnnouncedSecuritiesCategorizedasLevel1AssetsLiabilities      
Derivative, Notional Amount $ 33,709,043invest_DerivativeNotionalAmount $ 48,115,523invest_DerivativeNotionalAmount $ 43,576,146invest_DerivativeNotionalAmount $ 37,366,610invest_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 14,342,845us-gaap_AvailableForSaleSecurities 14,341,102us-gaap_AvailableForSaleSecurities    
Trading Securities 2,010,000us-gaap_TradingSecurities 1,997,656us-gaap_TradingSecurities    
Mortgage servicing rights 410,229us-gaap_ServicingAssetAtFairValueAmount 452,006us-gaap_ServicingAssetAtFairValueAmount 476,663us-gaap_ServicingAssetAtFairValueAmount 514,402us-gaap_ServicingAssetAtFairValueAmount
Fair Value, Measurements, Recurring [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Available-for-sale Securities 14,342,845us-gaap_AvailableForSaleSecurities
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14,341,102us-gaap_AvailableForSaleSecurities
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Trading Securities 2,010,000us-gaap_TradingSecurities
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1,997,656us-gaap_TradingSecurities
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Mortgage loans held-for-sale 568,582us-gaap_MortgagesHeldForSaleFairValueDisclosure
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535,712us-gaap_MortgagesHeldForSaleFairValueDisclosure
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Mortgage loans held-for-investment in securitization trust 2,170,206us-gaap_LoansReceivableFairValueDisclosure
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1,744,746us-gaap_LoansReceivableFairValueDisclosure
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Derivative assets 362,646us-gaap_DerivativeAssets
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380,791us-gaap_DerivativeAssets
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Mortgage servicing rights 410,229us-gaap_ServicingAssetAtFairValueAmount
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452,006us-gaap_ServicingAssetAtFairValueAmount
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Assets, Fair Value Disclosure 19,864,508us-gaap_AssetsFairValueDisclosure
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19,452,013us-gaap_AssetsFairValueDisclosure
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Collateralized borrowings in securitization trust 1,400,571us-gaap_DebtInstrumentFairValue
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1,209,663us-gaap_DebtInstrumentFairValue
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Derivative liabilities 155,149us-gaap_DerivativeLiabilities
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90,233us-gaap_DerivativeLiabilities
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Liabilities, Fair Value Disclosure 1,555,720us-gaap_LiabilitiesFairValueDisclosure
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1,299,896us-gaap_LiabilitiesFairValueDisclosure
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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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Trading Securities 2,010,000us-gaap_TradingSecurities
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1,997,656us-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 trust 0us-gaap_LoansReceivableFairValueDisclosure
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Derivative assets 0us-gaap_DerivativeAssets
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10,350us-gaap_DerivativeAssets
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Mortgage servicing rights 0us-gaap_ServicingAssetAtFairValueAmount
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Assets, Fair Value Disclosure 2,010,000us-gaap_AssetsFairValueDisclosure
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2,008,006us-gaap_AssetsFairValueDisclosure
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Collateralized borrowings in securitization trust 0us-gaap_DebtInstrumentFairValue
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Derivative liabilities 17,931us-gaap_DerivativeLiabilities
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17,687us-gaap_DerivativeLiabilities
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Liabilities, Fair Value Disclosure 17,931us-gaap_LiabilitiesFairValueDisclosure
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17,687us-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 14,342,845us-gaap_AvailableForSaleSecurities
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14,341,102us-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 498,433us-gaap_MortgagesHeldForSaleFairValueDisclosure
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500,159us-gaap_MortgagesHeldForSaleFairValueDisclosure
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Mortgage loans held-for-investment in securitization trust 2,170,206us-gaap_LoansReceivableFairValueDisclosure
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1,744,746us-gaap_LoansReceivableFairValueDisclosure
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Derivative assets 362,646us-gaap_DerivativeAssets
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370,441us-gaap_DerivativeAssets
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Mortgage servicing rights 0us-gaap_ServicingAssetAtFairValueAmount
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Assets, Fair Value Disclosure 17,374,130us-gaap_AssetsFairValueDisclosure
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16,956,448us-gaap_AssetsFairValueDisclosure
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Collateralized borrowings in securitization trust 1,400,571us-gaap_DebtInstrumentFairValue
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1,209,663us-gaap_DebtInstrumentFairValue
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Derivative liabilities 137,218us-gaap_DerivativeLiabilities
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72,546us-gaap_DerivativeLiabilities
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Liabilities, Fair Value Disclosure 1,537,789us-gaap_LiabilitiesFairValueDisclosure
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1,282,209us-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 70,149us-gaap_MortgagesHeldForSaleFairValueDisclosure
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35,553us-gaap_MortgagesHeldForSaleFairValueDisclosure
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Mortgage loans held-for-investment in securitization trust 0us-gaap_LoansReceivableFairValueDisclosure
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Derivative assets 0us-gaap_DerivativeAssets
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Mortgage servicing rights 410,229us-gaap_ServicingAssetAtFairValueAmount
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452,006us-gaap_ServicingAssetAtFairValueAmount
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Assets, Fair Value Disclosure 480,378us-gaap_AssetsFairValueDisclosure
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Collateralized borrowings in securitization trust 0us-gaap_DebtInstrumentFairValue
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Derivative liabilities 0us-gaap_DerivativeLiabilities
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Liabilities, Fair Value Disclosure 0us-gaap_LiabilitiesFairValueDisclosure
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Forward Purchase Commitments [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Derivative, Notional Amount 707,304invest_DerivativeNotionalAmount
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554,838invest_DerivativeNotionalAmount
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153,637invest_DerivativeNotionalAmount
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12,063invest_DerivativeNotionalAmount
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Derivative Financial Instruments, Liabilities [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Derivative, Notional Amount 16,905,295invest_DerivativeNotionalAmount
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16,200,000invest_DerivativeNotionalAmount
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Derivative, Fair Value, Net (155,149)us-gaap_DerivativeFairValueOfDerivativeNet
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(90,233)us-gaap_DerivativeFairValueOfDerivativeNet
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Derivative Financial Instruments, Liabilities [Member] | Forward Purchase Commitments [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Derivative, Notional Amount 109,295invest_DerivativeNotionalAmount
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Derivative, Fair Value, Net $ (80)us-gaap_DerivativeFairValueOfDerivativeNet
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