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Comprehensive Income (Tables)
3 Months Ended
Mar. 31, 2012
Comprehensive Income [Abstract]  
Components Of Accumulated Other Comprehensive Income [Text Block]
    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, 2011 $ 229,795 $ 1,419,318 $ (30,960) $ 1,618,153
 Change in component during the period   24,080   (30,721)   290   (6,351)
Balance, March 31, 2012 $ 253,875 $ 1,388,597 $ (30,670) $ 1,611,802