Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingent Liabilities (Details)

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Commitments and Contingent Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Commercial [Member]
   
Contract amounts of various commitments to extend credit    
Contract amount represents credit risk $ 10,943,604 $ 10,198,327
Consumer [Member]
   
Contract amounts of various commitments to extend credit    
Contract amount represents credit risk 7,288,323 6,544,606
Commercial Real Estate [Member]
   
Contract amounts of various commitments to extend credit    
Contract amount represents credit risk 872,448 765,982
Standby Letters of Credit [Member]
   
Contract amounts of various commitments to extend credit    
Contract amount represents credit risk $ 477,824 $ 439,834