Retirement Plans (Schedules of Net Benefit Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2021
Retirement Benefits [Abstract]
Interest cost	$ 211	$ 156	$ 146
Net amortization and deferral	211	255	269
Total	$ 422	$ 411	$ 415