Inventories (Narrative) (Details) - USD ($) $ in Thousands	Nov. 30, 2022	Aug. 31, 2022	Nov. 30, 2021
Inventory [Line Items]
Inventories, net	$ 188,404	$ 193,776	$ 173,115
LIFO, basis amount	52,900	55,500	50,500
FIFO, basis amount	$ 135,500	$ 138,300	$ 122,700