Annual report pursuant to Section 13 and 15(d)

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

v3.3.1.900
Basis of Presentation and Significant Accounting Policies Offsetting Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Member]    
Offsetting Assets and Liabilities [Line Items]    
Gross Amount of Recognized Assets (Liabilities) $ (5,008,274) $ (12,932,463)
Gross Amounts Offset in the Consolidated Balance Sheets 0 0
Net Amount of Assets (Liabilities) Presented in the Consolidated Balance Sheets (5,008,274) (12,932,463)
Gross Amounts of Financial Instruments Not Offset in the Consolidated Balance Sheets 5,008,274 12,932,463
Gross Amounts of Cash Collateral Not Offset in the Consolidated Balance Sheets 0 0
Net Amount 0 0
Derivative Financial Instruments, Liabilities [Member]    
Offsetting Assets and Liabilities [Line Items]    
Gross Amount of Recognized Assets (Liabilities) (61,531) (152,932)
Gross Amounts Offset in the Consolidated Balance Sheets 54,246 62,699
Net Amount of Assets (Liabilities) Presented in the Consolidated Balance Sheets (7,285) (90,233)
Gross Amounts of Financial Instruments Not Offset in the Consolidated Balance Sheets 7,285 90,233
Gross Amounts of Cash Collateral Not Offset in the Consolidated Balance Sheets 0 0
Net Amount 0 0
Liability [Member]    
Offsetting Assets and Liabilities [Line Items]    
Gross Amount of Recognized Assets (Liabilities) (5,069,805) (13,085,395)
Gross Amounts Offset in the Consolidated Balance Sheets 54,246 62,699
Net Amount of Assets (Liabilities) Presented in the Consolidated Balance Sheets (5,015,559) (13,022,696)
Gross Amounts of Financial Instruments Not Offset in the Consolidated Balance Sheets 5,015,559 13,022,696
Gross Amounts of Cash Collateral Not Offset in the Consolidated Balance Sheets 0 0
Net Amount 0 0
Derivative Financial Instruments, Assets [Member]    
Offsetting Assets and Liabilities [Line Items]    
Gross Amount of Recognized Assets (Liabilities) 325,755 443,490
Gross Amounts Offset in the Consolidated Balance Sheets (54,246) (62,699)
Net Amount of Assets (Liabilities) Presented in the Consolidated Balance Sheets 271,509 380,791
Gross Amounts of Financial Instruments Not Offset in the Consolidated Balance Sheets (7,285) (90,233)
Gross Amounts of Cash Collateral Not Offset in the Consolidated Balance Sheets 0 0
Net Amount 264,224 290,558
Assets [Member]    
Offsetting Assets and Liabilities [Line Items]    
Gross Amount of Recognized Assets (Liabilities) 325,755 443,490
Gross Amounts Offset in the Consolidated Balance Sheets (54,246) (62,699)
Net Amount of Assets (Liabilities) Presented in the Consolidated Balance Sheets 271,509 380,791
Gross Amounts of Financial Instruments Not Offset in the Consolidated Balance Sheets (7,285) (90,233)
Gross Amounts of Cash Collateral Not Offset in the Consolidated Balance Sheets 0 0
Net Amount $ 264,224 $ 290,558