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Accumulated Other Comprehensive Income (Tables)
9 Months Ended
Sep. 30, 2011
Accumulated Other Comprehensive Income 
Summary Of Accumulated Other Comprehensive Income, Net Of Taxes
   
September 30,
   
December 31,
 
   
2011
   
2010
 
             
Net unrealized gains on investments
  $ 885,490     $ 1,749,757  
Net unrealized foreign exchange losses
    (2,742 )     (3,838 )
Net minimum pension liability
    (59,706 )     (60,177 )
Net postretirement benefit
    1,137       1,621  
    $ 824,179     $ 1,687,363