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Fair Value Measurements (Tables)
9 Months Ended12 Months Ended
Sep. 30, 2011
Dec. 31, 2010
Fair Value Measurements [Abstract]  
Schedule Of Fair Value Of Assets And Liabilities Measured On Recurring Basis
                                 
As of September 30, 2011
  
Quoted Prices
in Active
Markets for
Identical Assets
(Level 1)
    
Significant
Other
Observable
Inputs
(Level 2)
    
Significant
Unobservable
Inputs
(Level 3)
    
Balance at
 September 30, 
2011
  
                         
Assets
                        
Money market funds(1)
   $ 101,398     $ -     $ -     $ 101,398  
Equity mutual funds(2)
     1,909       -       -       1,909  
Foreign currency exchange contracts(3)
     -       6,243       -       6,243  
Liabilities
                                
Foreign currency exchange contracts(3)
     -       2,185       -       2,185  
Deferred compensation(4)
     1,909       -       -       1,909  
Interest rate swaps(5)
     -       1,141       -       1,141  
                                 
As of December 31, 2010
  
Quoted Prices
in Active
Markets for
Identical Assets
(Level 1)
    
Significant
Other
Observable
Inputs
(Level 2)
    
Significant
Unobservable
Inputs
(Level 3)
    
Balance at
December 31, 2010
  
                         
Assets
                        
Money market funds(1)
   $ 67,025     $ -     $ -     $ 67,025  
Equity mutual funds(2)
     2,222       -       -       2,222  
Liabilities
                                
Foreign currency exchange contracts(3)
     -       2,234       -       2,234  
Deferred compensation(4)
     2,222       -       -       2,222  
Interest rate swaps(5)
     -       1,611       -       1,611  
 
(1)
Money market funds are included within cash and cash equivalents.
(2)
Equity mutual funds relate to a deferred compensation plan that was assumed as part of a previous business combination. This amount is included within other long-term assets, net. See number (4) below for a discussion of the related deferred compensation liability.
(3)
Foreign currency exchange contracts are included within other current assets; other long-term assets, net; accrued liabilities; or other long-term liabilities depending on the gain (loss) position and anticipated settlement date.
(4)
Deferred compensation plans are included within other long-term liabilities. The fair value of our deferred compensation plan is indexed to the performance of the underlying equity mutual funds discussed in number (2) above.
(5)
Interest rate swaps are included within accrued liabilities.