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Shareholders' Equity (Tables)
 6 Months Ended
Jun. 30, 2016
Equity [Abstract]  
Components of Accumulated Other Comprehensive Loss
The components of accumulated other comprehensive loss are as follows:
 
June 30,
2016
 
December 31,
2015
Unrealized gain (loss) on investments
$
220

 
$
(519
)
Foreign currency translation adjustments
(21,871
)
 
(12,233
)
Total accumulated other comprehensive loss
$
(21,651
)
 
$
(12,752
)