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Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance (Details) (USD $)
In Thousands, unless otherwise specified
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3 Months Ended |
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Mar. 31, 2015
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Mar. 31, 2014
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| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
| Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments |
$ (126,443)us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments
|
$ (105,528)us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
2,967us-gaap_DerivativeGainLossOnDerivativeNet
|
5,801us-gaap_DerivativeGainLossOnDerivativeNet
|
| Gain (Loss) on Interest Rate Swap and Swaption Agreements |
(110,693)two_UnrealizedGainLossonInterestRateSwapsandSwaptions
|
(90,452)two_UnrealizedGainLossonInterestRateSwapsandSwaptions
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| Gain (Loss) on Mortgage Loans Held-for-Sale |
9,092two_GainLossonResidentialMortgageLoansHeldforSale
|
(3,181)two_GainLossonResidentialMortgageLoansHeldforSale
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| Trading Activity, Gains and Losses, Net |
(122,506)us-gaap_TradingGainsLosses
|
(100,144)us-gaap_TradingGainsLosses
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| Agency To-be-Announced Securities, Non-Risk Management [Member] |
|
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| Derivative Instruments, Gain (Loss) [Line Items] |
|
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| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
0us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= two_AgencyTobeAnnouncedSecuritiesNonRiskManagementMember
|
(4,701)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= two_AgencyTobeAnnouncedSecuritiesNonRiskManagementMember
|
| Inverse Interest-Only Securities [Member] |
|
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| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
19,261us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= two_InverseInterestOnlySecuritiesMember
|
18,323us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= two_InverseInterestOnlySecuritiesMember
|
| Forward Purchase Commitments [Member] |
|
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| Derivative Instruments, Gain (Loss) [Line Items] |
|
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| Gain (Loss) on Mortgage Loans Held-for-Sale |
970two_GainLossonResidentialMortgageLoansHeldforSale
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_LoanPurchaseCommitmentsMember
|
(417)two_GainLossonResidentialMortgageLoansHeldforSale
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_LoanPurchaseCommitmentsMember
|
| Interest Rate Risk Associated with the Investment Portfolio [Member] | Forward Contracts [Member] |
|
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| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
(27,958)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForwardContractsMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
|
(17,903)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForwardContractsMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
|
| Interest Rate Risk Associated with the Investment Portfolio [Member] | Options Held [Member] |
|
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| Derivative Instruments, Gain (Loss) [Line Items] |
|
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| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
2,535us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_OptionMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
|
(1,705)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_OptionMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
|
| Interest Rate Risk Associated with the Investment Portfolio [Member] | Swap [Member] |
|
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| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
6,090us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_SwapMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
|
11,531us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_SwapMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
|
| Interest Rate Risk Associated with the Investment Portfolio [Member] | Short US Treasury Securities [Member] |
|
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| Derivative Instruments, Gain (Loss) [Line Items] |
|
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| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
0us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= two_ShortUsTreasurySecuritiesMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
|
0us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= two_ShortUsTreasurySecuritiesMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
|
| Interest Rate Risk Associated with the Investment Portfolio [Member] | Interest Rate Swaption [Member] |
|
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| Derivative Instruments, Gain (Loss) [Line Items] |
|
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| Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments |
(18,506)us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwaptionMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
|
(112,558)us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwaptionMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
|
| Interest Rate Risk Associated with the Investment Portfolio [Member] | Total Return Swap [Member] |
|
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| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
3,132us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_TotalReturnSwapMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
|
(1,725)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_TotalReturnSwapMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
|
| Interest Rate Risk Associated with the Investment Portfolio [Member] | Short [Member] | Interest Rate Swap [Member] |
|
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| Derivative Instruments, Gain (Loss) [Line Items] |
|
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| Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments |
42,326us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_PositionAxis
= us-gaap_ShortMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
|
40,979us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_PositionAxis
= us-gaap_ShortMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
|
| Interest Rate Risk Associated with the Investment Portfolio [Member] | Long [Member] | Interest Rate Swap [Member] |
|
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| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
| Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments |
(52,559)us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_PositionAxis
= us-gaap_LongMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
|
(13,420)us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_PositionAxis
= us-gaap_LongMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
|
| Interest Rate Risk Associated with Borrowings [Member] | Long [Member] | Interest Rate Swap [Member] |
|
|
| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
| Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments |
(97,704)us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_PositionAxis
= us-gaap_LongMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwithBorrowingsMember
|
(20,529)us-gaap_GainLossOnInterestRateDerivativeInstrumentsNotDesignatedAsHedgingInstruments
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_PositionAxis
= us-gaap_LongMember
/ two_RiskTypeAxis
= two_InterestRateRiskAssociatedwithBorrowingsMember
|
| Credit Risk Associated with Non-Agency RMBS and Mortgage Loans Held-for-Sale [Member] | Credit Default Swap, Selling Protection [Member] |
|
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| Derivative Instruments, Gain (Loss) [Line Items] |
|
|
| Derivative Instruments, Gain (Loss) Recognized in Income, Net |
$ (93)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CreditDefaultSwapSellingProtectionMember
/ two_RiskTypeAxis
= two_CreditRiskAssociatedwithNonAgencyRMBSandResidentialMortgageLoansHeldforSaleMember
|
$ 1,981us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CreditDefaultSwapSellingProtectionMember
/ two_RiskTypeAxis
= two_CreditRiskAssociatedwithNonAgencyRMBSandResidentialMortgageLoansHeldforSaleMember
|