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Comprehensive Income (Loss) (Tables)
9 Months Ended
Sep. 30, 2011
Comprehensive Income (Loss) [Abstract] 
Components Of Comprehensive Income (Loss)
   
Three Months Ended September 30,
   
Nine Months Ended September 30,
 
   
2011
   
2010
   
2011
   
2010
 
Net income (loss)
 
$
5,361
   
$
1,182
   
$
32,255
   
$
(1,386
)
Foreign currency translation adjustments
   
(4,030
)
   
1,412
     
(2,449
 )
   
753
 
Unrealized gain (loss) on securities
   
(160
)
   
(10
)
   
5
     
(7
)
Reversal of unrealized gain on securities sold
   
     
     
(178
)
   
(589
)
                                 
Total comprehensive income (loss) 
 
$
1,171
   
$
2,584
   
$
29,633
   
$
(1,229
)