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Dividends (Tables)
6 Months Ended
Jun. 30, 2011
Dividends  
Dividends Paid
     Quarter ended  
     March 31, 2011      June 30, 2011  

Cash dividend per common share

   $ .15625       $ .15750   

Total cash dividends paid

   $ 10,402,000       $ 10,500,000   

Record date

     February 11         April 22   

Payment date

     March 4         May 13