Other Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Oct. 31, 2021	Jul. 31, 2020	Jul. 31, 2021
Other Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	$ 131,733		$ 132,094
Accumulated Amortization	(43,514)		(39,760)
Net Book Value	88,219		92,334
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 9,771		9,745
Tradenames [Member]
Other Intangible Assets [Line Items]
Weighted Average Amortization Period	3 years	3 years
Finite-Lived Intangible Assets, Gross	$ 1,814		1,821
Accumulated Amortization	(530)		(356)
Finite-Lived Intangible Assets, Net	$ 1,284		1,465
Customer Relationships [Member]
Other Intangible Assets [Line Items]
Weighted Average Amortization Period	9 years	9 years
Finite-Lived Intangible Assets, Gross	$ 110,615		110,950
Accumulated Amortization	(42,152)		(39,069)
Finite-Lived Intangible Assets, Net	$ 68,463		71,881
Technology [Member]
Other Intangible Assets [Line Items]
Weighted Average Amortization Period	5 years	5 years
Finite-Lived Intangible Assets, Gross	$ 9,533		9,578
Accumulated Amortization	(832)		(335)
Finite-Lived Intangible Assets, Net	$ 8,701		$ 9,243