Funded Status of Defined Benefit Pension Plans (Detail) - USD ($)	12 Months Ended
	Aug. 31, 2026	Aug. 31, 2025
Defined Benefit Plan Disclosure [Line Items]
Amount of benefits expected to be paid in fiscal 2024	$ 400,000
Amount of benefits expected to be paid in fiscal 2025	400,000
Amount of benefits expected to be paid in, fiscal 2026	400,000
Fair value of plan assets	27,100,000	$ 28,000,000.0
401(k) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount	$ 1
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	50.00%