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Accumulated Other Comprehensive Loss (Tables)
 6 Months Ended
May 31, 2018
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss)
The following table summarizes the changes in accumulated balances of other comprehensive loss during the six months ended May 31, 2018 (in thousands):

 
Foreign Currency Translation Adjustment
 
Unrealized Losses on Investments
 
Accumulated Other Comprehensive Loss
Balance, December 1, 2017
$
(18,770
)
 
$
(229
)
 
$
(18,999
)
Other comprehensive loss before reclassifications, net of tax
(5,187
)
 
(28
)
 
(5,215
)
Balance, May 31, 2018
$
(23,957
)
 
$
(257
)
 
$
(24,214
)