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		6 Months Ended
	Feb. 29, 2024	Feb. 28, 2023	Feb. 29, 2024	Feb. 28, 2023
Earnings Per Share [Abstract]
Net earnings	$ 18,123	$ 18,052	$ 33,142	$ 36,269
Weighted average shares outstanding	11,033	11,007	11,025	10,998
Diluted effect of stock awards	41	56	42	70
Weighted average shares outstanding assuming dilution	11,074	11,063	11,067	11,068
Basic net earnings per share	$ 1.64	$ 1.64	$ 3.01	$ 3.3
Diluted net earnings per share	$ 1.64	$ 1.63	$ 2.99	$ 3.28