Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Oct. 31, 2020	Jul. 31, 2020
Property, Plant, Equipment, and ROU Assets [Line Items]
Lease right-of-use assets – operating	$ 34,078	$ 33,609
Lease right-of-use assets – finance	3,536	3,672
Total cost	1,464,214	1,456,986
Less accumulated depreciation	(372,273)	(349,337)
Property, plant and equipment, net	1,091,941	1,107,649
Land
Property, Plant, Equipment, and ROU Assets [Line Items]
Property, plant and equipment	135,604	136,200
Buildings and improvements
Property, Plant, Equipment, and ROU Assets [Line Items]
Property, plant and equipment	767,246	760,986
Machinery and equipment
Property, Plant, Equipment, and ROU Assets [Line Items]
Property, plant and equipment	448,204	438,985
Rental vehicles
Property, Plant, Equipment, and ROU Assets [Line Items]
Property, plant and equipment	$ 75,546	$ 83,534