Annual report pursuant to Section 13 and 15(d)

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

v2.4.1.9
Federal Home Loan Bank of Des Moines Advances Schedule of Maturities of Federal Home Loan Bank Advances (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Schedule of Maturities of Federal Home Loan Bank Advances [Line Items]    
Federal Home Loan Bank advances $ 2,500,000us-gaap_AdvancesFromFederalHomeLoanBanks $ 0us-gaap_AdvancesFromFederalHomeLoanBanks
Maturity Within One Year [Member]    
Schedule of Maturities of Federal Home Loan Bank Advances [Line Items]    
Federal Home Loan Bank advances 33,738us-gaap_AdvancesFromFederalHomeLoanBanks
/ two_FederalHomeLoanBankAdvancesMaturityPeriodsAxis
= two_MaturityWithinOneYearMember 		0us-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 		0us-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 		0us-gaap_AdvancesFromFederalHomeLoanBanks
/ two_FederalHomeLoanBankAdvancesMaturityPeriodsAxis
= two_MaturityThreetoFiveYearsMember
Maturity Five to Ten Years [Member]    
Schedule of Maturities of Federal Home Loan Bank Advances [Line Items]    
Federal Home Loan Bank advances 0us-gaap_AdvancesFromFederalHomeLoanBanks
/ two_FederalHomeLoanBankAdvancesMaturityPeriodsAxis
= two_MaturityFivetoTenYearsMember 		0us-gaap_AdvancesFromFederalHomeLoanBanks
/ two_FederalHomeLoanBankAdvancesMaturityPeriodsAxis
= two_MaturityFivetoTenYearsMember
Maturity Over Ten Years [Member]    
Schedule of Maturities of Federal Home Loan Bank Advances [Line Items]    
Federal Home Loan Bank advances $ 1,000,000us-gaap_AdvancesFromFederalHomeLoanBanks
/ two_FederalHomeLoanBankAdvancesMaturityPeriodsAxis
= two_MaturityOverTenYearsMember 		$ 0us-gaap_AdvancesFromFederalHomeLoanBanks
/ two_FederalHomeLoanBankAdvancesMaturityPeriodsAxis
= two_MaturityOverTenYearsMember