XML 63 R41.htm IDEA: XBRL DOCUMENT v2.4.0.6
Financial Instruments (Details 6) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Assets:    
Derivatives asset, Notional $ 100,000 $ 100,000
Derivatives asset, Fair Value 0 20
Liabilities:    
Derivative liability, notional 7,677,389 6,062,292
Derivative liability, Fair Value 2,549 2,421
Derivatives designated as hedging instruments [Member] | Interest rate contract [Member] | Cap [Member]
    
Assets:    
Derivatives asset, Notional 100,000 100,000
Derivatives asset, Fair Value 0 20
Derivatives not designated as hedging instruments [Member] | Commodity contracts [Member] | Federal Funds Futures [Member]
    
Liabilities:    
Derivative liability, notional 7,580,000 5,985,000
Derivative liability, Fair Value 145 8
Derivatives not designated as hedging instruments [Member] | Commodity contracts [Member] | U.S. Treasury Futures [Member]
    
Liabilities:    
Derivative liability, notional 20,000 20,000
Derivative liability, Fair Value 69 66
Derivatives not designated as hedging instruments [Member] | Commodity contracts [Member] | Euro Dollars Futures [Member]
    
Liabilities:    
Derivative liability, notional 37,000  
Derivative liability, Fair Value 1  
Derivatives not designated as hedging instruments [Member] | Other contracts [Member] | Auction rate securities purchase commitment [Member]
    
Liabilities:    
Derivative liability, notional 40,389 57,292
Derivative liability, Fair Value $ 2,334 $ 2,347