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Allowance For Doubtful Accounts (Tables)
 12 Months Ended
Dec. 31, 2011
Allowance For Doubtful Accounts [Abstract]  
Schedule Of Allowance For Doubtful Accounts
      2011     2010     2009  

Balance as of January 1

    $ 11,531        10,690        10,642   

Provision charged to expense

      3,728        3,991        2,078   

Charged to other accounts(1)

     (57 )      (89 )      347   

Deductions

      (3,717 )      (3,061 )      (2,377 ) 

Balance as of December 31

    $ 11,485        11,531        10,690   

 

(1) Includes primarily the effect of foreign currency translation adjustments for the Company's subsidiaries with functional currencies other than the USD.