Significant Accounting Policies - Impact of Adopting ASC 606 on Condensed Consolidated Statement of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	$ 778,527	$ 646,135
Total cost of goods sold	455,186	374,370
Net income (loss)	$ 33,616	$ (473,363)
Diluted net income (loss) per potential common share (in dollars per share)	$ 0.21	$ (3.29)
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	$ (10,900)
Total cost of goods sold	(9,129)
Net income (loss)	$ (399)
Diluted net income (loss) per potential common share (in dollars per share)	$ 0.00
Calculated under Revenue Guidance in Effect before Topic 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Total revenue	$ 767,627
Total cost of goods sold	446,057
Net income (loss)	$ 33,217
Diluted net income (loss) per potential common share (in dollars per share)	$ 0.21