Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Oct. 31, 2019	Jul. 31, 2019
Property, Plant and Equipment [Line Items]
Total cost	$ 1,388,809	$ 1,362,120
Less accumulated depreciation	(284,045)	(269,649)
Property, plant and equipment, net	1,104,764	1,092,471
Land
Property, Plant and Equipment [Line Items]
Total cost	131,066	142,475
Building and improvements
Property, Plant and Equipment [Line Items]
Total cost	741,722	742,736
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total cost	403,183	389,666
Rental vehicles
Property, Plant and Equipment [Line Items]
Total cost	76,751	$ 87,243
Lease right-of-use assets - operating
Property, Plant and Equipment [Line Items]
Total cost	32,008
Lease right-of-use assets - finance
Property, Plant and Equipment [Line Items]
Total cost	$ 4,079