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Fair Value of Financial Instruments (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2014
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Dec. 31, 2013
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| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Repurchase agreements | $ 12,932,463us-gaap_AssetsSoldUnderAgreementsToRepurchaseRepurchaseLiability | $ 12,250,450us-gaap_AssetsSoldUnderAgreementsToRepurchaseRepurchaseLiability |
| Long-term Federal Home Loan Bank Advances | 2,466,262us-gaap_FederalHomeLoanBankAdvancesLongTerm | |
| Maturity Over One Year [Member] | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Repurchase agreements |
$ 93,221us-gaap_AssetsSoldUnderAgreementsToRepurchaseRepurchaseLiability / us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis = two_MaturityOverOneYearMember |
$ 200,000us-gaap_AssetsSoldUnderAgreementsToRepurchaseRepurchaseLiability / us-gaap_AssetsSoldUnderAgreementsToRepurchaseMaturityPeriodsAxis = two_MaturityOverOneYearMember |
| X | ||||||||||
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- Definition
Amount to be repaid to the counterparty to the repurchase agreement when the carrying amount (or market value, if higher than the carrying amount) of securities or other assets sold under the repurchase agreement exceeds 10 percent of total assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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