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	3 Months Ended		9 Months Ended
	May 31, 2025	May 31, 2024	May 31, 2025	May 31, 2024
Earnings Per Share [Abstract]
Net earnings	$ 19,500	$ 20,379	$ 63,239	$ 53,521
Weighted average shares outstanding	10,862	10,996	10,860	11,016
Diluted effect of stock awards	69	34	55	39
Weighted average shares outstanding assuming dilution	10,931	11,030	10,915	11,055
Basic net earnings per share	$ 1.80	$ 1.85	$ 5.82	$ 4.86
Diluted net earnings per share	$ 1.78	$ 1.85	$ 5.79	$ 4.84