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Changes in Stockholders' Equity and Accumulated other Comprehensive loss (Tables)
 6 Months Ended
Jun. 30, 2012
Stockholders' Equity Note [Abstract]  
Schedule of Changes in Stockholders' Equity and Accumulated other Comprehensive Loss
Changes in Stockholders' Equity and Accumulated other Comprehensive loss (in thousands):

 
Common
stock
  
Paid-in
 capital
 
Treasury
stock
 
Accumu-
lated
deficit
 
Accumu-
lated
other
compre-
hensive
loss
 
Total
Balances, December 31, 2011
$
1,177


$
627,637

 
$
—


$
(234,908
)
 
$
(345
)

$
393,561

Net loss for the six months ended June 30, 2012
—

  
—

 
—

 
(20,256
)
 
—

 
(20,256
)
Unrealized loss related to marketable securities, net
—

  
—

 
—

 
—

 
(22
)
 
(22
)
Recognized gain on redemption of marketable securities, previously unrealized
—

 
—

 
—

 
—

 
(78
)
 
(78
)
Translation adjustments
—

  
—

 
—

 
—

 
259

 
259

Common stock issued in connection with the exercise of stock options, ESPP and vested RSUs (net of taxes)
10

  
2,017

 
—

 
—

 
—

 
2,027

Stock repurchase
—

 
—

 
(6,970
)
 
—

 
—

 
(6,970
)
Retirement of treasury stock
(13
)
 
(6,957
)
 
6,970

 
—

 
—

 
—

Stock-based compensation expense related to stock options, ESPP and RSUs
—

  
3,678

 
—

 
—

 
—

 
3,678

Balances, June 30, 2012
$
1,174

 
$
626,375

 
$
—

 
$
(255,164
)
 
$
(186
)
 
$
372,199