Capital Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Aug. 31, 2025	Aug. 31, 2024	Aug. 31, 2023	Oct. 01, 2014	Mar. 29, 2014	Sep. 28, 2011
Earnings Per Share [Abstract]
Net earnings (loss)	$ 92,749	$ 85,749	$ 46,561
Weighted average common shares outstanding for basic earnings per share	54,049,000	54,336,000	56,680,000
Net effect of dilutive securities-employee stock compensation plans	436,000	526,000	437,000
Weighted average common and equivalent shares outstanding for diluted earnings per share	54,485,000	54,862,000	57,117,000
Income (Loss) from Continuing Operations, Per Basic Share	$ 1.72	$ 1.51	$ 0.95
Income (Loss) from Continuing Operations, Per Diluted Share	1.70	1.50	0.94
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	0	0.07	(0.13)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	0	0.06	(0.12)
Loss per share - Basic (in dollars per share)	1.72	1.58	0.82
Diluted Earnings Per Share (in dollars per share):	$ 1.70	$ 1.56	$ 0.82
Anti-dilutive securities-equity based compensation plans (excluded from earnings per share calculation)	130,000	96,000	891,000
Net Earnings (Loss) from Continuing Operations	$ 92,749	$ 82,207	$ 53,649
Net (Loss) Earnings from Discontinued Operations	$ 0	$ 3,542	$ (7,088)
Shares authorized in buyback program	10,000,000			7,000,000	7,000,000	7,000,000