Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities Interest Spread on Interest Rate Swaps (Details)

v2.4.1.9
Derivative Instruments and Hedging Activities Interest Spread on Interest Rate Swaps (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, Average Notional Amount $ 42,996,135two_DerivativeAverageNotionalAmount $ 39,708,009two_DerivativeAverageNotionalAmount
Interest Rate Swap [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Interest Expense on Interest Rate Swap and Swaption Agreements (27,525)two_InterestExpenseOnInterestRateSwapAndSwaptionAgreements
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
(13,836)two_InterestExpenseOnInterestRateSwapAndSwaptionAgreements
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
Derivative, Average Notional Amount $ 18,238,389two_DerivativeAverageNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
$ 19,156,878two_DerivativeAverageNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember