Inventories (Narrative) (Details) - USD ($) $ in Thousands	May 31, 2024	Aug. 31, 2023	May 31, 2023
Inventory [Line Items]
Inventories, net	$ 171,522	$ 155,932	$ 166,759
LIFO, basis amount	49,800	42,200	45,300
FIFO, basis amount	$ 121,700	$ 113,700	$ 121,500