Inventories (Narrative) (Details) - USD ($) $ in Thousands	May 31, 2025	Aug. 31, 2024	May 31, 2024
Inventory [Line Items]
Inventories, net	$ 150,462	$ 154,453	$ 171,522
LIFO, basis amount	37,900	42,700	49,800
FIFO, basis amount	$ 112,600	$ 111,800	$ 121,700