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Accumulated Other Comprehensive Loss (Tables)
 9 Months Ended
Aug. 31, 2018
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Loss
The following table summarizes the changes in accumulated balances of other comprehensive loss during the nine months ended August 31, 2018 (in thousands):

 
Foreign Currency Translation Adjustment
 
Unrealized (Losses) Gains on Investments
 
Accumulated Other Comprehensive Loss
Balance, December 1, 2017
$
(18,770
)
 
$
(229
)
 
$
(18,999
)
Other comprehensive loss before reclassifications, net of tax
(7,137
)
 
24

 
(7,113
)
Balance, August 31, 2018
$
(25,907
)
 
$
(205
)
 
$
(26,112
)