Quarterly report pursuant to Section 13 or 15(d)

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

v3.2.0.727
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