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Note 11 - Commitments Guarantees, and Contingent Liabilities (Tables)
 6 Months Ended
Jun. 30, 2012
Contractual or Notional Amounts of Financial Instruments [Text Block]
   
June 30,
2012
   
December 31,
2011
 
Commitments to extend credit:
           
Commercial and industrial
  $ 641,637     $ 609,601  
Commercial real estate
    157,964       139,574  
Home equity lines
    253,449       257,315  
1-4 family real estate construction
    16,477       13,300  
Credit card lines
    23,522       21,257  
Overdraft protection program (1)
    175,260       178,699  
All other commitments
    81,712       129,015  
Total commitments
  $ 1,350,021     $ 1,348,761  
Letters of credit:
               
1-4 family real estate construction
  $ 7,039     $ 8,661  
Commercial real estate
    53,211       49,373  
All other
    49,020       58,532  
Total letters of credit
  $ 109,270     $ 116,566  
Unamortized fees associated with letters of credit (2)
  $ 516     $ 668  
Remaining weighted-average term (in months)
    13.39       9.62  
Remaining lives (in years)
 
0.1 to 12.1
   
0.1 to 12.6