Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Jan. 31, 2021	Jul. 31, 2020
Property, Plant, Equipment, and ROU Assets [Line Items]
Lease right-of-use assets – operating	$ 37,615	$ 33,609
Lease right-of-use assets – finance	7,361	3,672
Total cost	1,527,229	1,456,986
Less accumulated depreciation	(394,507)	(349,337)
Property, plant and equipment, net	1,132,722	1,107,649
Land
Property, Plant, Equipment, and ROU Assets [Line Items]
Property, plant and equipment	141,459	136,200
Buildings and improvements
Property, Plant, Equipment, and ROU Assets [Line Items]
Property, plant and equipment	805,276	760,986
Machinery and equipment
Property, Plant, Equipment, and ROU Assets [Line Items]
Property, plant and equipment	490,604	438,985
Rental vehicles
Property, Plant, Equipment, and ROU Assets [Line Items]
Property, plant and equipment	$ 44,914	$ 83,534