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Accumulated Other Comprehensive Loss
 3 Months Ended
Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss
The components of Accumulated other comprehensive loss, net of tax, are as follows: 
 
Foreign
Currency
Translation
Adjustments
 
Unrealized
Gains (Losses)
on Investments
 
Accumulated Other Comprehensive Loss
Balance, January 1, 2018
$
(19,522
)
 
$
(386
)
 
$
(19,908
)
 
 
 
 
 
 
Other comprehensive gain before reclassifications
3,377

 
(1,357
)
 
2,020

Amounts reclassified from accumulated other comprehensive loss
—

 
(273
)
 
(273
)
Net current-period other comprehensive gain
3,377

 
(1,630
)
 
1,747

 
 
 
 
 
 
Balance, March 31, 2018
$
(16,145
)
 
$
(2,016
)
 
$
(18,161
)