Annual report pursuant to Section 13 and 15(d)

Mortgage Loans Held-for-Investment in Securitization Trusts, at Fair Value (Details)

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Mortgage Loans Held-for-Investment in Securitization Trusts, at Fair Value (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Mortgage Loans Held-for-Invesment, Unpaid Principal $ 1,699,748two_MortgageLoansHeldForInvesmentUnpaidPrincipal $ 812,538two_MortgageLoansHeldForInvesmentUnpaidPrincipal
Mortgage Loans Held-for-Investment, Fair Value Adjustment 44,998two_MortgageLoansHeldForInvestmentFairValueAdjustment (20,148)two_MortgageLoansHeldForInvestmentFairValueAdjustment
Mortgage loans held-for-investment in securitization trusts, at fair value $ 1,744,746us-gaap_LoansAndLeasesReceivableNetReportedAmountOther $ 792,390us-gaap_LoansAndLeasesReceivableNetReportedAmountOther