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Deposits (Tables)
9 Months Ended
Sep. 30, 2011
Deposits [Abstract] 
Deposits summary
Deposits consisted of the following for the periods presented ($ in thousands):

   
September 30,
  
December 31,
 
   
2011
  
2010
 
Noninterest-bearing demand deposits
 $1,871,040  $1,636,625 
Interest-bearing demand
  1,505,851   1,474,045 
Savings
  2,111,556   1,809,116 
Time
  2,081,277   2,124,781 
Total
 $7,569,724  $7,044,567