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Derivative Financial Instruments (Asset and liability management) (Details)

v2.4.0.6
Derivative Financial Instruments (Asset and liability management) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Y
Gross notional values of derivatives used in companies Asset and Liability Management  
Fair Value Hedge $ 1,324,875
Cash Flow Hedge 8,411,800
Notional Amount of Derivatives, Total 9,736,675
Additional information about the interest rate swaps used in companies Asset and Liability Management  
Notional Value 9,736,675
Average Maturity (years) 2.6
Fair Value 188,796
Weighted-Average Rate Receive 131.00%
Weighted-Average Rate Pay 53.00%
Asset conversion swaps - Receive Fixed - Generic [Member]
 
Additional information about the interest rate swaps used in companies Asset and Liability Management  
Notional Value 7,961,000
Average Maturity (years) 2.5
Fair Value 72,841
Weighted-Average Rate Receive 111.00%
Weighted-Average Rate Pay 53.00%
Asset Conversion Swaps Pay Fixed Forward Starting [Member]
 
Additional information about the interest rate swaps used in companies Asset and Liability Management  
Notional Value 450,800
Average Maturity (years) 2.8
Fair Value (3,413)
Liability conversion swaps - Receive Fixed - Generic [Member]
 
Additional information about the interest rate swaps used in companies Asset and Liability Management  
Notional Value 1,324,875
Average Maturity (years) 3.4
Fair Value 119,368
Weighted-Average Rate Receive 288.00%
Weighted-Average Rate Pay 50.00%
Liability Conversion Swaps - Receive Fixed - Callable
 
Additional information about the interest rate swaps used in companies Asset and Liability Management  
Notional Value 0
Average Maturity (years) 0.0
Fair Value 0
Weighted-Average Rate Receive 0.00%
Weighted-Average Rate Pay 0.00%
Loan [Member]
 
Gross notional values of derivatives used in companies Asset and Liability Management  
Fair Value Hedge 0
Cash Flow Hedge 8,411,800
Notional Amount of Derivatives, Total 8,411,800
Investment securities [Member]
 
Gross notional values of derivatives used in companies Asset and Liability Management  
Fair Value Hedge 0
Cash Flow Hedge 0
Notional Amount of Derivatives, Total 0
Deposits [Member]
 
Gross notional values of derivatives used in companies Asset and Liability Management  
Fair Value Hedge 691,875
Cash Flow Hedge 0
Notional Amount of Derivatives, Total 691,875
Subordinated notes
 
Gross notional values of derivatives used in companies Asset and Liability Management  
Fair Value Hedge 598,000
Cash Flow Hedge 0
Notional Amount of Derivatives, Total 598,000
Other long-term debt
 
Gross notional values of derivatives used in companies Asset and Liability Management  
Fair Value Hedge 35,000
Cash Flow Hedge 0
Notional Amount of Derivatives, Total $ 35,000