Net Earnings Per Share (Schedule of Computation of Basic and Diluted Net Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Aug. 31, 2024	Aug. 31, 2023	Aug. 31, 2022
Earnings Per Share [Abstract]
Net earnings	$ 66,257	$ 72,379	$ 65,469
Weighted average shares outstanding	10,976	11,003	10,965
Diluted effect of stock equivalents	41	59	66
Weighted average shares outstanding assuming dilution	11,017	11,062	11,031
Basic net earnings per share	$ 6.04	$ 6.58	$ 5.97
Diluted net earnings per share	$ 6.01	$ 6.54	$ 5.94