U.S. Pension Plan Investment Allocations by Asset Category (Detail) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2025	Aug. 31, 2024	Aug. 31, 2023
Schedule of Pension Plan Assets by Fair Value [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 27,953	$ 28,454
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	$ 6,449	$ 6,495	$ 6,196
Defined Benefit Plan, Plan Assets, Benefits Paid	294	261
Fixed Income Securities
Schedule of Pension Plan Assets by Fair Value [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 14,591	$ 15,415
Percentage of fair value of pension plan assets	52.20%	54.20%
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	$ 12,120	$ 12,095
Percentage of fair value of pension plan assets	43.40%	42.50%
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	$ 2,471	$ 3,320
Percentage of fair value of pension plan assets	8.80%	11.70%
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	$ 13,362	$ 12,993
Percentage of fair value of pension plan assets	47.80%	45.60%
Income Receivable
Schedule of Pension Plan Assets by Fair Value [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 0	$ 46
Percentage of fair value of pension plan assets	0.00%	0.20%