Two Harbors Investment Corp. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

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- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Basis of Presentation and Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Derivative Instruments and Hedging Activities Schedule of Interest Rate Swap Receivers Associated with the Investment Portfolio (Details)

v2.4.1.9

Derivative Instruments and Hedging Activities Schedule of Interest Rate Swap Receivers Associated with the Investment Portfolio (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Derivative [Line Items]
Derivative, Notional Amount	$ 33,709,043invest_DerivativeNotionalAmount	$ 48,115,523invest_DerivativeNotionalAmount	$ 43,576,146invest_DerivativeNotionalAmount	$ 37,366,610invest_DerivativeNotionalAmount
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Notional Amount	19,929,000	18,584,000	21,663,148	19,619,000
Interest Rate Risk Associated with the Investment Portfolio [Member] \| Interest Rate Swap [Member] \| Short [Member]
Derivative [Line Items]
Derivative, Notional Amount	2,464,000	2,154,000
Derivative, Average Variable Interest Rate	2.32%	2.433%
Derivative, Average Fixed Interest Rate	0.263%	0.237%
Derivative, Average Remaining Period Until Maturity	7.25	7.77
Interest Rate Risk Associated with the Investment Portfolio [Member] \| Derivative Maturity Over Three And Within Four Years From Balance Sheet Date [Member] \| Interest Rate Swap [Member] \| Short [Member]
Derivative [Line Items]
Derivative, Notional Amount	575,000	575,000
Derivative, Average Variable Interest Rate	1.44%	1.44%
Derivative, Average Fixed Interest Rate	0.262%	0.231%
Derivative, Average Remaining Period Until Maturity	3.64	3.89
Interest Rate Risk Associated with the Investment Portfolio [Member] \| Derivative Maturity Over Four Years From Balance Sheet Date [Member] \| Interest Rate Swap [Member] \| Short [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 1,889,000	$ 1,579,000
Derivative, Average Variable Interest Rate	2.588%	2.794%
Derivative, Average Fixed Interest Rate	0.263%	0.239%
Derivative, Average Remaining Period Until Maturity	8.35	9.19

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

Name:	invest_DerivativeNotionalAmount
Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Average remaining period until maturity of the group of derivatives identified.

+ References

No definition available.

+ Details

Name:	two_DerivativeAverageRemainingPeriodUntilMaturity
Namespace Prefix:	two_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Average fixed interest rate related to the group of interest rate derivatives.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeAverageFixedInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Average variable interest rate related to the group of interest rate derivatives.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativeAverageVariableInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Period Type:	duration

- Details

Name:	two_RiskTypeAxis=two_InterestRateRiskAssociatedwiththeInvestmentPortfolioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: