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Accumulated Other Comprehensive Income (Loss) (Tables)
 6 Months Ended
Apr. 30, 2017
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:
 
April 30,
2017
 
October 31,
2016
 
(in thousands)
Cumulative currency translation adjustments
$
(75,399
)
 
$
(84,700
)
Unrealized gain (loss) on derivative instruments, net of taxes
(3,815
)
 
(19,896
)
Unrealized gain (loss) on available-for-sale securities, net of taxes
(35
)
 
19

Total accumulated other comprehensive income (loss)
$
(79,249
)
 
$
(104,577
)
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:
 
Three Months Ended 
 April 30,
 
Six Months Ended 
 April 30,
 
2017
 
2016
 
2017
 
2016
 
(in thousands)
Reclassifications from accumulated other comprehensive income (loss) into unaudited condensed consolidated statement of operations:
 
 
 
 
 
 
 
Gain (loss) on cash flow hedges, net of taxes
 
 
 
 
 
 
 
Revenues
$
(428
)
 
$
(1,429
)
 
$
(2,181
)
 
$
(1,217
)
Operating expenses
(1,310
)
 
(3,768
)
 
(3,412
)
 
(7,696
)
Gain (loss) on available-for-sale securities
 
 
 
 
 
 
 
Other income (expense)
$
—

 
13

 
1

 
$
10

Total reclassifications into net income
$
(1,738
)
 
$
(5,184
)
 
$
(5,592
)
 
$
(8,903
)