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Dividends
6 Months Ended
Jun. 30, 2011
Dividends [Abstract]  
Dividends
Note 6. Dividends
     The following table sets forth the quarterly dividends declared by our Board of Directors for the periods covered in this report:
                                 
    Dividend     Aggregate              
    per Common     Dividend              
Declaration Date   Share     Amount     Record Date     Payment Date  
December 14, 2009
  0.10     7,955     December 31, 2009   January 15, 2010
March 12, 2010
  0.10       7,951     March 31, 2010   April 15, 2010
May 25, 2010
  0.10       7,947     June 30, 2010   July 15, 2010
September 21, 2010
  0.10       7,947     September 30, 2010   October 15, 2010
December 6, 2010
  0.10       7,964     December 31, 2010   January 14, 2011
March 8, 2011
  0.10       7,857     March 31, 2011   April 15, 2011
June 27, 2011
  0.125       9,364     July 7, 2011   July 15, 2011