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Shareholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2011
Shareholders' Equity [Abstract]  
Components Of Accumulated Other Comprehensive Income Loss
     
2011
      
2010
  
                 
Cumulative foreign currency translation adjustment
  
$
(22,958
)
  
$
(21,956
)
Unrealized losses on hedges, net (1) 
    
12,941
      
(17,102
)
     Accumulated other comprehensive loss
 
$
(10,017
)
  
$
(39,058
)
 
(1)  
Amounts are net of deferred income tax asset (liabilities) totaling $7.0 million and $(9.2) million at December 31, 2011 and 2010, respectively.