Quarterly report pursuant to Section 13 or 15(d)

Schedule of Underlying Assets of Federal Home Loan Bank Advances (Details)

v2.4.1.9
Schedule of Underlying Assets of Federal Home Loan Bank Advances (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Schedule of Assets Underlying Federal Home Loan Bank Advances [Line Items]    
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged $ 2,879,334us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1 $ 2,762,920us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
Available-for-sale Securities [Member]    
Schedule of Assets Underlying Federal Home Loan Bank Advances [Line Items]    
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged 2,158,907us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
/ two_SecuritiesorOtherAssetsUnderlyingFederalHomeLoanBankAdvancesAxis
= us-gaap_AvailableforsaleSecuritiesMember
2,284,532us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
/ two_SecuritiesorOtherAssetsUnderlyingFederalHomeLoanBankAdvancesAxis
= us-gaap_AvailableforsaleSecuritiesMember
Loans Held-for-sale, Mortgages [Member]    
Schedule of Assets Underlying Federal Home Loan Bank Advances [Line Items]    
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged 402,770us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
/ two_SecuritiesorOtherAssetsUnderlyingFederalHomeLoanBankAdvancesAxis
= two_LoansHeldForSaleMortgagesMember
397,656us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
/ two_SecuritiesorOtherAssetsUnderlyingFederalHomeLoanBankAdvancesAxis
= two_LoansHeldForSaleMortgagesMember
Retained Interest [Member]    
Schedule of Assets Underlying Federal Home Loan Bank Advances [Line Items]    
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged $ 317,657us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
/ two_SecuritiesorOtherAssetsUnderlyingFederalHomeLoanBankAdvancesAxis
= us-gaap_RetainedInterestMember
$ 80,732us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1
/ two_SecuritiesorOtherAssetsUnderlyingFederalHomeLoanBankAdvancesAxis
= us-gaap_RetainedInterestMember