Inventories (Narrative) (Details) - USD ($) $ in Thousands	Feb. 28, 2023	Aug. 31, 2022	Feb. 28, 2022
Inventory [Line Items]
Inventories, net	$ 178,703	$ 193,776	$ 187,328
LIFO, basis amount	47,200	55,500	53,500
FIFO, basis amount	$ 131,500	$ 138,300	$ 133,900