Annual report pursuant to Section 13 and 15(d)

Mortgage Loans Held-for-Sale, at Fair Value (Details)

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Mortgage Loans Held-for-Sale, at Fair Value (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans Held-for-sale, Mortgages, Unpaid Principal $ 534,101two_LoansHeldForSaleMortgagesUnpaidPrincipal $ 680,840two_LoansHeldForSaleMortgagesUnpaidPrincipal    
Loans Held-for-sale, Mortgages, Fair Value Adjustment 1,611two_LoansHeldForSaleMortgagesFairValueAdjustment (136,259)two_LoansHeldForSaleMortgagesFairValueAdjustment    
Mortgage loans held-for-sale, at fair value 535,712us-gaap_LoansAndLeasesReceivableNetReportedAmount 544,581us-gaap_LoansAndLeasesReceivableNetReportedAmount 58,607us-gaap_LoansAndLeasesReceivableNetReportedAmount 5,782us-gaap_LoansAndLeasesReceivableNetReportedAmount
Loans Pledged as Collateral $ 416,779us-gaap_LoansPledgedAsCollateral $ 200,839us-gaap_LoansPledgedAsCollateral