TWO Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Derivative Instruments and Hedging Activities Schedule of Credit Default Swaps, Receive Protection (Details)

Derivative Instruments and Hedging Activities Schedule of Credit Default Swaps, Receive Protection (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative [Line Items]
Derivative, Notional Amount	$ (48,115,523)invest_DerivativeNotionalAmount	$ (37,366,610)invest_DerivativeNotionalAmount	$ (22,377,656)invest_DerivativeNotionalAmount
Credit Default Swap, Buying Protection [Member]
Derivative [Line Items]
Derivative, Average Implied Credit Spread	183.60
Derivative, Notional Amount	(125,000)
Derivative, Fair Value, Net	(1,672)
Derivative, Cost	(4,322)
Derivative, Unrealized Gains (Losses)	(5,994)
Credit Default Swap, Buying Protection [Member] \| Maturity Date, 06/20/2016 [Member]
Derivative [Line Items]
Derivative, Maturity Date	Jun. 20, 2016
Derivative, Average Implied Credit Spread	105.50
Derivative, Notional Amount	(100,000)
Derivative, Fair Value, Net	(1,350)
Derivative, Cost	(260)
Derivative, Unrealized Gains (Losses)	(1,610)
Credit Default Swap, Buying Protection [Member] \| Maturity Date, 12/20/2016 [Member]
Derivative [Line Items]
Derivative, Maturity Date	Dec. 20, 2016
Derivative, Average Implied Credit Spread	496.00
Derivative, Notional Amount	(25,000)
Derivative, Fair Value, Net	(322)
Derivative, Cost	(4,062)
Derivative, Unrealized Gains (Losses)	(4,384)
Credit Default Swap, Buying Protection [Member] \| Credit Risk [Member]
Derivative [Line Items]
Derivative, Average Implied Credit Spread		329.13
Derivative, Notional Amount		(427,073)
Derivative, Fair Value, Net		(18,049)
Derivative, Cost		(6,510)
Derivative, Unrealized Gains (Losses)		(24,559)
Credit Default Swap, Buying Protection [Member] \| Credit Risk [Member] \| Maturity Date, 06/20/2016 [Member]
Derivative [Line Items]
Derivative, Maturity Date		Jun. 20, 2016
Derivative, Average Implied Credit Spread		105.50
Derivative, Notional Amount		(100,000)
Derivative, Fair Value, Net		(2,149)
Derivative, Cost		(260)
Derivative, Unrealized Gains (Losses)		(2,409)
Credit Default Swap, Buying Protection [Member] \| Credit Risk [Member] \| Maturity Date, 12/20/2016 [Member]
Derivative [Line Items]
Derivative, Maturity Date		Dec. 20, 2016
Derivative, Average Implied Credit Spread		496.00
Derivative, Notional Amount		(25,000)
Derivative, Fair Value, Net		(401)
Derivative, Cost		(4,062)
Derivative, Unrealized Gains (Losses)		(4,463)
Credit Default Swap, Buying Protection [Member] \| Credit Risk [Member] \| Maturity Date, 12/20/2018 [Member]
Derivative [Line Items]
Derivative, Maturity Date		Dec. 20, 2018
Derivative, Average Implied Credit Spread		393.31
Derivative, Notional Amount		(270,000)
Derivative, Fair Value, Net		(23,568)
Derivative, Cost		12,838
Derivative, Unrealized Gains (Losses)		(10,730)
Credit Default Swap, Buying Protection [Member] \| Credit Risk [Member] \| Maturity Date, 05/25/2046 [Member]
Derivative [Line Items]
Derivative, Maturity Date		May 25, 2046
Derivative, Average Implied Credit Spread		356.00
Derivative, Notional Amount		(32,073)
Derivative, Fair Value, Net		8,069
Derivative, Cost		(15,026)
Derivative, Unrealized Gains (Losses)		$ (6,957)