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Comprehensive Income (Tables)
6 Months Ended
Jun. 30, 2011
Comprehensive Income Abstract  
Comprehensive Income Table Text Block
 
    Three months ended  Six months ended
    June 30,  June 30,  June 30,  June 30,
    2011  2010  2011  2010
Net income$ 132,888 $ 127,019 $ 293,704 $ 249,458
Other comprehensive income (loss), net of income tax:           
 Unrealized investment gains, net of reclassification           
  adjustment for gains included in net income  151,582   217,369   115,764   367,341
 Reclassification adjustment for other-than-temporary           
   impairments  (190)   91   (190)   (1,433)
Currency translation adjustments  14,140   (63,564)   41,127   (36,893)
Unrealized pension and postretirement benefit adjustment  358   58   572   118
  Comprehensive income$ 298,778 $ 280,973 $ 450,977 $ 578,591
Components Of Accumulated Other Comprehensive Income Text Block
The balance of and changes in each component of accumulated other comprehensive income (loss) for the six months ended June 30, 2011 are as follows (dollars in thousands):
               
    Accumulated Other Comprehensive Income (Loss), Net of Income Tax
     Accumulated         
     Currency  Unrealized  Pension and   
     Translation  Appreciation  Postretirement   
     Adjustments  of Securities  Benefits  Total
Balance, December 31, 2010 $ 270,526 $ 651,449 $ (14,560) $ 907,415
 Change in component during the period   41,127   115,574   572   157,273
Balance, June 30, 2011 $ 311,653 $ 767,023 $ (13,988) $ 1,064,688