Quarterly report pursuant to Section 13 or 15(d)

Schedule of Maturities of Federal Home Loan Bank Advances (Details)

v2.4.1.9
Schedule of Maturities of Federal Home Loan Bank Advances (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Schedule of Maturities of Federal Home Loan Bank Advances [Line Items]    
Federal Home Loan Bank advances $ 2,625,000us-gaap_AdvancesFromFederalHomeLoanBanks $ 2,500,000us-gaap_AdvancesFromFederalHomeLoanBanks
Maturity Within One Year [Member]    
Schedule of Maturities of Federal Home Loan Bank Advances [Line Items]    
Federal Home Loan Bank advances 0us-gaap_AdvancesFromFederalHomeLoanBanks
/ two_FederalHomeLoanBankAdvancesMaturityPeriodsAxis
= two_MaturityWithinOneYearMember 		33,738us-gaap_AdvancesFromFederalHomeLoanBanks
/ two_FederalHomeLoanBankAdvancesMaturityPeriodsAxis
= two_MaturityWithinOneYearMember
Maturity One to Three Years [Member]    
Schedule of Maturities of Federal Home Loan Bank Advances [Line Items]    
Federal Home Loan Bank advances 651,238us-gaap_AdvancesFromFederalHomeLoanBanks
/ two_FederalHomeLoanBankAdvancesMaturityPeriodsAxis
= two_MaturityOnetoThreeYearsMember 		651,238us-gaap_AdvancesFromFederalHomeLoanBanks
/ two_FederalHomeLoanBankAdvancesMaturityPeriodsAxis
= two_MaturityOnetoThreeYearsMember
Maturity Three to Five Years [Member]    
Schedule of Maturities of Federal Home Loan Bank Advances [Line Items]    
Federal Home Loan Bank advances 815,024us-gaap_AdvancesFromFederalHomeLoanBanks
/ two_FederalHomeLoanBankAdvancesMaturityPeriodsAxis
= two_MaturityThreetoFiveYearsMember 		815,024us-gaap_AdvancesFromFederalHomeLoanBanks
/ two_FederalHomeLoanBankAdvancesMaturityPeriodsAxis
= two_MaturityThreetoFiveYearsMember
Maturity One to Two Years [Member]    
Schedule of Maturities of Federal Home Loan Bank Advances [Line Items]    
Federal Home Loan Bank advances 0us-gaap_AdvancesFromFederalHomeLoanBanks
/ two_FederalHomeLoanBankAdvancesMaturityPeriodsAxis
= two_MaturityOnetoTwoYearsMember 		0us-gaap_AdvancesFromFederalHomeLoanBanks
/ two_FederalHomeLoanBankAdvancesMaturityPeriodsAxis
= two_MaturityOnetoTwoYearsMember
Maturity Over Two Years [Member]    
Schedule of Maturities of Federal Home Loan Bank Advances [Line Items]    
Federal Home Loan Bank advances $ 1,158,738us-gaap_AdvancesFromFederalHomeLoanBanks
/ two_FederalHomeLoanBankAdvancesMaturityPeriodsAxis
= two_MaturityOverTwoYearsMember 		$ 1,000,000us-gaap_AdvancesFromFederalHomeLoanBanks
/ two_FederalHomeLoanBankAdvancesMaturityPeriodsAxis
= two_MaturityOverTwoYearsMember