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Accumulated Other Comprehensive Loss (Tables)
 6 Months Ended
Jun. 30, 2017
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) The components of accumulated other comprehensive loss, net of tax, consist of the following (in thousands):
 
June 30,
 
December 31,
 
2017
 
2016
Foreign currency translation adjustment
$
(7,184
)
 
$
(19,277
)
Net unrealized gain (loss) on investments, net of tax
6,251

 
(1,856
)
        Accumulated other comprehensive loss
$
(933
)
 
$
(21,133
)