Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments (Hedging instruments) (Details 1)

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Derivative Financial Instruments (Hedging instruments) (Details 1) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Mar. 31, 2011
Accrued income and other assets [Member]
      
Asset derivatives included in accrued income and other assets      
Interest rate contracts designated as hedging instruments $ 127,601 $ 175,932 $ 68,385
Interest rate contracts not designated as hedging instruments 288,525 309,496 225,781
Foreign exchange contracts not designated as hedging instruments 5,178 4,885 3,450
Total derivative assets 421,304 490,313 297,616
Accrued expenses and other liabilities [Member]
      
Liability derivatives included in accrued expenses and other liabilities      
Interest rate contracts designated as hedging instruments 0 0 384
Interest rate contracts not designated as hedging instruments 233,673 252,962 187,155
Foreign exchange contracts not designated as hedging instruments 4,697 4,318 3,491
Total derivative liabilities $ 238,370 $ 257,280 $ 191,030