Supplemental financial statement information - Shipping and Handling (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2023
Supplemental financial statement information
Operating expense - personnel, vehicle, plant and other	$ 630,834	$ 601,602	$ 577,520
Depreciation and amortization expense	98,426	98,471	93,370
Operating expense - equipment lease expense	18,720	21,585	23,252
Shipping and Handling
Supplemental financial statement information
Operating expense - personnel, vehicle, plant and other	295,763	283,627	291,268
Depreciation and amortization expense	16,662	13,231	15,807
Operating expense - equipment lease expense	10,410	13,775	13,165
Shipping and handling expenses	$ 322,835	$ 310,633	$ 320,240