Other Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Jul. 31, 2019
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Amortization of Intangible Assets	$ 1,291	$ 1,436
Intangible Assets, Amortization Expense, Next Twelve Months	5,164
Intangible Assets, Amortization Expense, Year Two	5,164
Intangible Assets, Amortization Expense, Year Three	4,898
Intangible Assets, Amortization Expense, Year Four	2,025
Intangible Assets, Amortization Expense, Year Five	$ 0
Other Intangible Assets [Line Items]
Weighted Average Amortization Period	9 years		9 years
Intangible Assets, Gross (Excluding Goodwill)	$ 65,494			$ 65,466
Finite-Lived Intangible Assets, Gross	46,594			46,595
Accumulated Amortization	(30,634)			(29,343)
Finite-Lived Intangible Assets, Net	15,960			17,252
Net Book Value	34,860			36,123
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 18,900			$ 18,871