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Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands | Jul. 31, 2018 | Oct. 31, 2017
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Inventory Disclosure [Abstract] |  |
Raw materials and component parts | $ 108,234 | $ 105,424
Work-in-process | 56,525 | 45,743
Finished goods | 152,671 | 152,923
Inventories - gross | 317,430 | 304,090
Obsolescence and other reserves | (38,971) | (33,140)
LIFO reserve | (7,099) | (6,684)
Inventories - net | $ 271,360 | $ 264,266

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