U.S. Pension Plan Investment Allocations by Asset Category (Detail) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2026	Aug. 31, 2025	Aug. 31, 2024
Schedule of Pension Plan Assets by Fair Value [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 27,100	$ 28,000
Percentage of fair value of pension plan assets	100.00%	100.00%
Foreign Plan Member
Schedule of Pension Plan Assets by Fair Value [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 6,400	$ 6,500	$ 6,500
Defined Benefit Plan, Plan Assets, Benefits Paid	300	300
Fixed Income Securities
Schedule of Pension Plan Assets by Fair Value [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 19,500	$ 14,600
Percentage of fair value of pension plan assets	72.00%	52.10%
Fixed Income Securities | Corporate Bond Securities | Fair Value, Inputs, Level 2
Schedule of Pension Plan Assets by Fair Value [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 0	$ 0
Percentage of fair value of pension plan assets	0.00%	0.00%
Fixed Income Securities | Mutual Funds | Fair Value, Inputs, Level 1
Schedule of Pension Plan Assets by Fair Value [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 16,200	$ 12,100
Percentage of fair value of pension plan assets	59.80%	43.20%
Fixed Income Securities | US Treasury Securities | Fair Value, Inputs, Level 2
Schedule of Pension Plan Assets by Fair Value [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 3,300	$ 2,500
Percentage of fair value of pension plan assets	12.20%	8.90%
Cash and cash equivalents | Fair Value, Inputs, Level 1
Schedule of Pension Plan Assets by Fair Value [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 0	$ 0
Percentage of fair value of pension plan assets	0.00%	0.00%
Equity Securities | Mutual Funds | Fair Value, Inputs, Level 1
Schedule of Pension Plan Assets by Fair Value [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 7,600	$ 13,400
Percentage of fair value of pension plan assets	28.00%	47.90%
Income Receivable
Schedule of Pension Plan Assets by Fair Value [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 0	$ 0
Percentage of fair value of pension plan assets	0.00%	0.00%