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Commitments And Contingencies (Tables)
3 Months Ended
Mar. 31, 2012
Commitments And Contingencies [Abstract]  
Summary Of Financial Instruments Outstanding
     Contract Amount  
(dollars in thousands)    March 31, 2012      December 31, 2011  

Commitments to grant loans

   $ 330,667       $ 243,458   

Unfunded commitments under lines of credit

     1,853,329         1,773,601   

Commercial and standby letters of credit

     55,135         49,530