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Accumulated Other Comprehensive Income (Tables)
 6 Months Ended
Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of accumulated other comprehensive loss
8. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)
The changes in the balances of each component of accumulated other comprehensive loss during the six months ended June 30, 2015 are as follows (in thousands):
 
Foreign currency translation adjustments
 
Unrealized gains (losses) on marketable securities
 
Total
Balance as of January 1, 2015
$
(1,467
)
 
$
(445
)
 
$
(1,912
)
Other comprehensive income, net of tax
173

 
135

 
308

Balance as of June 30, 2015
$
(1,294
)
 
$
(310
)
 
$
(1,604
)