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Comprehensive Loss (Tables)
6 Months Ended
Jun. 30, 2011
Comprehensive Loss [Abstract]  
Components of comprehensive loss, net of tax
For the three and six months ended June 30, 2011 and 2010, the components of comprehensive loss are:

 
Three months ended June 30,
 
2011
2010
Net loss
$(62,505)
$(25,474)
Change in net unrealized gain (loss) on marketable securities, net of tax effect of $0.9 million in 2011
 
1,271
 
(1,023)
   Total comprehensive loss
$(61,234)
$(26,497)

 
Six months ended June 30,
 
2011
2010
Net loss
$(105,952)
$(55,996)
Change in net unrealized gain (loss) on marketable securities, net of tax effect of $1.1 million in 2011
 
1,587
 
(1,350)
   Total comprehensive loss
$(104,365)
$(57,346)