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Accumulated Other Comprehensive Loss (Tables)
 9 Months Ended
Sep. 30, 2017
Equity [Abstract]  
Summary of Changes in Accumulated Other Comprehensive Loss
The following table is a summary of changes in accumulated other comprehensive loss by component (in thousands):
 
 
Foreign currency translation adjustments
 
Total
Accumulated other comprehensive loss at December 31, 2016
 
$
(21,748
)
 
$
(21,748
)
Net current-period other comprehensive income
 
2,749

 
2,749

Accumulated other comprehensive loss at September 30, 2017
 
$
(18,999
)
 
$
(18,999
)