TWO Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Significant Accounting Policies Offsetting Assets and Liabilities (Details)

Basis of Presentation and Significant Accounting Policies Offsetting Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Derivative Financial Instruments, Assets [Member]
Offsetting Assets and Liabilities [Line Items]
Gross Amount of Recognized Assets (Liabilities)	$ 414,958	$ 443,490
Gross Amounts Offset on the Balance Sheet	(67,636)	(62,699)
Net Amount of Assets (Liabilities) Presented on the Balance Sheet	347,322	380,791
Gross Amounts of Financial Instruments Not Offset on the Balance Sheet	(22,475)	(90,233)
Gross Amounts of Cash Collateral Not Offset on the Balance Sheet	0	0
Net Amount After Deducting Gross Amounts Not Offset on the Balance Sheet From Net Amount of Assets (Liabilities) Presented on the Balance Sheet	324,847	290,558
Assets [Member]
Offsetting Assets and Liabilities [Line Items]
Gross Amount of Recognized Assets (Liabilities)	414,958	443,490
Gross Amounts Offset on the Balance Sheet	(67,636)	(62,699)
Net Amount of Assets (Liabilities) Presented on the Balance Sheet	347,322	380,791
Gross Amounts of Financial Instruments Not Offset on the Balance Sheet	(22,475)	(90,233)
Gross Amounts of Cash Collateral Not Offset on the Balance Sheet	0	0
Net Amount After Deducting Gross Amounts Not Offset on the Balance Sheet From Net Amount of Assets (Liabilities) Presented on the Balance Sheet	324,847	290,558
Securities Loaned or Sold under Agreements to Repurchase [Member]
Offsetting Assets and Liabilities [Line Items]
Gross Amount of Recognized Assets (Liabilities)	(9,422,803)	(12,932,463)
Gross Amounts Offset on the Balance Sheet	0	0
Net Amount of Assets (Liabilities) Presented on the Balance Sheet	(9,422,803)	(12,932,463)
Gross Amounts of Financial Instruments Not Offset on the Balance Sheet	9,422,803	12,932,463
Gross Amounts of Cash Collateral Not Offset on the Balance Sheet	0	0
Net Amount After Deducting Gross Amounts Not Offset on the Balance Sheet From Net Amount of Assets (Liabilities) Presented on the Balance Sheet	0	0
Derivative Financial Instruments, Liabilities [Member]
Offsetting Assets and Liabilities [Line Items]
Gross Amount of Recognized Assets (Liabilities)	(90,111)	(152,932)
Gross Amounts Offset on the Balance Sheet	67,636	62,699
Net Amount of Assets (Liabilities) Presented on the Balance Sheet	(22,475)	(90,233)
Gross Amounts of Financial Instruments Not Offset on the Balance Sheet	22,475	90,233
Gross Amounts of Cash Collateral Not Offset on the Balance Sheet	0	0
Net Amount After Deducting Gross Amounts Not Offset on the Balance Sheet From Net Amount of Assets (Liabilities) Presented on the Balance Sheet	0	0
Liability [Member]
Offsetting Assets and Liabilities [Line Items]
Gross Amount of Recognized Assets (Liabilities)	(9,512,914)	(13,085,395)
Gross Amounts Offset on the Balance Sheet	67,636	62,699
Net Amount of Assets (Liabilities) Presented on the Balance Sheet	(9,445,278)	(13,022,696)
Gross Amounts of Financial Instruments Not Offset on the Balance Sheet	9,445,278	13,022,696
Gross Amounts of Cash Collateral Not Offset on the Balance Sheet	0	0
Net Amount After Deducting Gross Amounts Not Offset on the Balance Sheet From Net Amount of Assets (Liabilities) Presented on the Balance Sheet	$ 0	$ 0