Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Jan. 31, 2020	Jul. 31, 2019
Property, Plant, Equipment, and ROU Assets [Line Items]
Property, plant and equipment		$ 1,362,120
Lease right-of-use assets - operating	$ 31,870
Lease right-of-use assets - finance	3,944
Total cost	1,389,480
Less accumulated depreciation	(300,324)
Property, plant and equipment, net	1,089,156
Total cost		1,362,120
Less accumulated depreciation		(269,649)
Property, plant and equipment, net	1,089,156	1,092,471
Land
Property, Plant, Equipment, and ROU Assets [Line Items]
Property, plant and equipment	131,317	142,475
Total cost	131,317	142,475
Building and improvements
Property, Plant, Equipment, and ROU Assets [Line Items]
Property, plant and equipment	734,148	742,736
Total cost	734,148	742,736
Machinery and equipment
Property, Plant, Equipment, and ROU Assets [Line Items]
Property, plant and equipment	409,616	389,666
Total cost	409,616	389,666
Rental vehicles
Property, Plant, Equipment, and ROU Assets [Line Items]
Property, plant and equipment	78,585	87,243
Total cost	$ 78,585	$ 87,243