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Quarterly Financial Data (Unaudited)
12 Months Ended
Dec. 31, 2011
Quarterly Financial Data (Unaudited) [Abstract]  
Quarterly Financial Data (Unaudited)
(9)  Quarterly Financial Data (Unaudited) -

Selected quarterly financial data and earnings per share of the Company are presented below for the years ended December 31, 2011 and 2010 (in thousands, except per share data):

         
Net Earnings
  
Dividends
 
      
Operating
     
Per
     
Per
 
   
Revenues
  
Earnings (loss)
  
Amount
  
Share
  
Amount
  
Share
 
 2011 -                   
March 31
  $697,188  $8,475  $5,583  $1.32  $-  $- 
June 30
   824,210   5,807   3,589   .85   -   - 
September 30
   801,690   13,576   9,026   2.14   -   - 
December 31
   891,311   7,675   4,733   1.13   2,404   .57 
Total
  $3,214,399  $35,533  $22,931  $5.44  $2,404  $.57 
                           
 2010 -                         
March 31
  $533,785  $2,575  $1,794  $.43  $-  $- 
June 30
   547,141   2,656   1,685   .39   -   - 
September 30
   502,455   4,021   2,762   .66   -   - 
December 31
   628,589   3,294   2,390   .57   2,277   .54 
Total
  $2,211,970  $12,546  $8,631  $2.05  $2,277  $.54 

The above unaudited interim financial data reflect all adjustments that are in the opinion of management necessary to a fair statement of the results for the period presented.  All such adjustments are of a normal recurring nature.