Inventories (Detail) - USD ($) $ in Thousands	Jan. 31, 2020	Oct. 31, 2019
Inventories, net	$ 78,117	$ 67,159
Deferred income taxes	19,741	19,363
Retained earnings	182,989	185,703
Inventory, Raw Materials and Supplies, Net of Reserves [Abstract]
Raw materials	40,423	32,818
Finished goods and work in process	39,461	35,538
Supplies and other	2,644	2,593
Total	82,528	70,949
Less: Inventory reserves	4,411	3,790
Inventories, net	$ 78,117	$ 67,159