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Accumulated Other Comprehensive Income (Loss) (Tables)
 12 Months Ended
Oct. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Components of Accumulated Other Comprehensive Income (Loss)
Components of accumulated other comprehensive income (loss), on an after-tax basis where applicable, were as follows:
 
Year Ended October 31,
 
2018
 
2017
 
(in thousands)
Cumulative currency translation adjustments
$
(89,289
)
 
$
(70,407
)
Unrealized gain (loss) on derivative instruments, net of taxes
(23,888
)
 
4,428

Total accumulated other comprehensive income (loss)
$
(113,177
)
 
$
(65,979
)
Effect of Amounts Reclassified out of Each Component of Accumulated Other Comprehensive Income (Loss) into Net Income
The effect of amounts reclassified out of each component of accumulated other comprehensive income (loss) into net income was as follows:
 
Year Ended October 31,
 
2018
 
2017
 
2016
 
(in thousands)
Reclassifications from accumulated other comprehensive income (loss) into consolidated statement of operations:
 
 
 
 
 
Gain (loss) on cash flow hedges, net of taxes
 
 
 
 
 
Revenues
$
1,103

 
$
(2,759
)
 
$
(8,585
)
Operating expenses
9,785

 
(805
)
 
(12,125
)
Gain (loss) on available-for-sale securities
 
 
 
 
 
Other income (expense)
—

 
(8
)
 
18

Total reclassifications into net income
$
10,888

 
$
(3,572
)
 
$
(20,692
)