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Accumulated Other Comprehensive Loss (Tables)
 12 Months Ended
Dec. 31, 2013
Equity [Abstract]  
Reclassifications out of Accumulated Other Comprehensive Income
The following table summarizes the changes in accumulated other comprehensive loss by component:
 
Foreign currency translation adjustment
 
Unrealized holding gains on marketable securities
 
Unrealized losses on foreign currency forward contracts
 
Total
 
(in thousands)
Balance at December 31, 2012
$
(746
)
 
$
196

 
$
—

 
$
(550
)
Other comprehensive income (loss) before reclassifications
421

 
(154
)
 
(23
)
 
244

Amounts reclassified from accumulated other comprehensive loss
—

 
—

 
—

 
—

Net current period other comprehensive income (loss)
421

 
(154
)
 
(23
)
 
244

Balance at December 31, 2013
$
(325
)
 
$
42

 
$
(23
)
 
$
(306
)