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Accumulated Other Comprehensive Loss
 12 Months Ended
Dec. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Loss

The following table summarizes the changes in accumulated other comprehensive loss, which is reported as a component of stockholders' equity, for the year ended December 31, 2018 (in thousands):

 
Foreign Currency Translation
 
Net Unrealized Gains (Losses) on Investments
 
Total
Balance as of January 1, 2018
$
(24,319
)
 
$
2,389

 
$
(21,930
)
Other comprehensive (loss) income
(27,585
)
 
603

 
(26,982
)
Balance as of December 31, 2018
$
(51,904
)
 
$
2,992

 
$
(48,912
)


The tax effect on accumulated unrealized gains on investments was insignificant as of December 31, 2018 and 2017. Amounts reclassified from accumulated other comprehensive loss to net income were insignificant for the year ended December 31, 2018.