Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Schedule Of Recurring Fair Value Measurements) (Details)

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Fair Value Measurements (Schedule Of Recurring Fair Value Measurements) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Cash equivalents, Money market funds $ 1,310 $ 117
Cash equivalents, Time deposits 116,472 89,585
Derivative instruments 26,035 46,328
Investment securities 191,900 175,225
Other marketable securities 4,635 4,913
Derivative instruments 14,933 23,513
Deferred compensation 242,710 220,056
Quoted Prices In Active Markets For Identical Assets, Level 1 [Member]
   
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Cash equivalents, Money market funds 1,310 117
Cash equivalents, Time deposits 116,472 89,585
Investment securities 161,029 144,391
Other marketable securities 4,635 4,913
Significant Other Observable Inputs, Level 2 [Member]
   
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Derivative instruments 26,035 46,328
Investment securities 30,871 30,834
Derivative instruments 14,933 23,513
Deferred compensation 242,710 220,056
Significant Unobservable Inputs, Level 3 [Member]
   
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Cash equivalents, Money market funds      
Cash equivalents, Time deposits      
Derivative instruments      
Investment securities      
Other marketable securities      
Derivative instruments      
Deferred compensation