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Derivatives (Tables)
12 Months Ended
Dec. 31, 2011
Derivatives [Abstract]  
Derivative Contracts
The following table summarizes the fair values of derivative contracts recorded as “derivative contracts” assets and liabilities in the balance sheet at December 31, 2011 (in thousands):
 
   
Gross Basis
  
Net Basis²
 
   
Assets
  
Liabilities
  
Assets
  
Liabilities
 
   
Notional¹
  
Fair Value
  
Notional¹
  
Fair Value
  
Fair Value
  
Fair Value
 
Customer risk management programs:
                  
Interest rate contracts3
 $10,391,244  $182,450  $10,324,244  $181,102  $149,780  $148,432 
Energy contracts
  1,554,400   158,625   1,799,367   171,050   62,945   75,370 
Agricultural contracts
  146,252   4,761   148,924   4,680   782   701 
Foreign exchange contracts
  73,153   73,153   72,928   72,928   73,153   72,928 
Equity options
  208,647   12,508   208,647   12,508   12,508   12,508 
Total customer derivatives before cash collateral
  12,373,696   431,497   12,554,110   442,268   299,168   309,939 
Less: cash collateral
              (11,690)  (73,712)
Total customer derivatives
  12,373,696   431,497   12,554,110   442,268   287,478   236,227 
                          
Interest rate risk management programs
  44,000   6,381   25,000   295   6,381   295 
Total derivative contracts
 $12,417,696  $437,878  $12,579,110  $442,563  $293,859  $236,522 
¹
Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.
²
Derivative contracts are recorded on a net basis in the balance sheet in recognition of master netting agreements that enable the Company to settle all derivative positions with a given counterparty in total and to offset the net derivative position with the related cash collateral.
3
Includes interest rate swaps used by borrowers to modify interest rate terms of their loans and to be announced residential mortgage-backed securities used by mortgage banking customers to hedge their loan production.

 
The following table summarizes the fair values of derivative contracts recorded as “derivative contracts” assets and liabilities in the balance sheet at December 31, 2010 (in thousands):
 
   
Gross Basis
  
Net Basis²
 
   
Assets
  
Liabilities
  
Assets
  
Liabilities
 
   
Notional¹
  
Fair Value
  
Notional¹
  
Fair Value
  
Fair Value
  
Fair Value
 
Customer risk management programs:
                  
Interest rate contracts3
 $11,664,409  $235,961  $11,524,077  $233,421  $141,279  $138,739 
Energy contracts
  1,914,519   188,655   2,103,923   191,075   76,746   79,166 
Agricultural contracts
  183,250   10,616   186,709   10,534   4,226   4,144 
Foreign exchange contracts
  45,014   45,014   45,014   45,014   45,014   45,014 
Equity options
  160,535   16,247   160,535   16,247   16,247   16,247 
Total customer derivatives before cash collateral
  13,967,727   496,493   14,020,258   496,291   283,512   283,310 
Less: cash collateral
              (15,017)  (68,987)
Total customer derivatives
  13,967,727   496,493   14,020,258   496,291   268,495   214,323 
                          
Interest rate risk management programs
  124,000   1,950   17,977   1,097   1,950   1,097 
Total derivative contracts
 $14,091,727  $498,443  $14,038,235  $497,388  $270,445  $215,420 
¹
Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.
²
Derivative contracts are recorded on a net basis in the balance sheet in recognition of master netting agreements that enable the Company to settle all derivative positions with a given counterparty in total and to offset the net derivative position with the related cash collateral.
3
Includes interest rate swaps used by borrowers to modify interest rate terms of their loans and to be announced residential mortgage-backed securities used by mortgage banking customers to hedge their loan production.

Derivative Instruments, Gain (Loss) in Statement of Financial Performance
The following summarizes the pre-tax net gains (losses) on derivative instruments and where they are recorded in the income statement (in thousands):
   
Year ended December 31,
 
   
2011
  
2010
 
   
Brokerage
and
Trading
Revenue
  
Gain (Loss)
on Derivatives,
Net
  
Brokerage
and
Trading
Revenue
  
Gain (Loss)
on Derivatives,
Net
 
Customer risk management programs:
            
Interest rate contracts
 $(854) $  $2,784  $ 
Energy contracts
  5,262      7,951    
Agriculture contracts
  341      629    
Foreign exchange contracts
  565      375    
Equity options
            
Total customer derivatives
  5,314      11,739    
Interest rate risk management programs
     2,526      3,032 
Total derivative contracts
 $5,314  $2,526  $11,739  $3,032