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General Information (Tables)
6 Months Ended
Jun. 30, 2011
General Information [Abstract]  
Reconciliation of net income to comprehensive income
                                 
    Three Months Ended     Six Months Ended  
    June 30,     June 30,  
    2011     2010     2011     2010  
            (In thousands)          
Net income
  $ 266,586     $ 224,393     $ 517,198     $ 515,246  
Other comprehensive gains (losses), net of tax:
                               
FOREX contracts:
                               
Unrealized holding (loss) gain
    4,643       (3,397 )     7,683       (3,260 )
Reclassification adjustment for loss (gain) included in net income
    (3,541 )     356       (4,949 )     (729 )
Investments in marketable securities:
                               
Unrealized holding (loss) gain
    (5 )     (18 )     1       (22 )
Reclassification adjustment for loss (gain) included in net income
    (5 )     1       (379 )     1  
     
Comprehensive income
  $ 267,678     $ 221,335     $ 519,554     $ 511,236