Changes in Projected Benefit Obligations, Fair Value of Plan Assets and Funded Status of Defined Benefit Pension Plans (Detail) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2024	Aug. 31, 2023	Aug. 31, 2022
Reconciliation of plan assets:
Fair value of plan assets at beginning of year	$ 28,530
Fair value of plan assets at end of year	28,454	$ 28,530
Fixed Income Securities
Reconciliation of plan assets:
Fair value of plan assets at beginning of year	15,928
Fair value of plan assets at end of year	15,415	15,928
Foreign Plan Member
Reconciliation of benefit obligations:
Benefit obligation at beginning of year	8,085	8,017
Interest cost	344	306	$ 159
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	1	494
Defined Benefit Plan, Benefit Obligation, Benefits Paid	(261)	(256)
Defined Benefit Plan, Benefit Obligation, Payment for Settlement	0	213
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	199	665
Benefit obligation at end of year	8,510	8,085	8,017
Defined Benefit Plan, Service Cost	144	60	90
Reconciliation of plan assets:
Fair value of plan assets at beginning of year	6,195	6,208
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	323	(359)
Defined Benefit Plan, Plan Assets, Contributions by Employer	69	286
Defined Benefit Plan, Plan Assets, Benefits Paid	(261)	(469)
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	169	529
Fair value of plan assets at end of year	6,495	6,195	6,208
Funded status of the plans (underfunded)	(2,015)	(1,889)
Domestic Plan Member
Reconciliation of benefit obligations:
Benefit obligation at beginning of year	33,204	37,135
Interest cost	1,716	1,694	1,165
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	1,273	(2,337)
Defined Benefit Plan, Benefit Obligation, Benefits Paid	(3,337)	(3,288)
Benefit obligation at end of year	32,856	33,204	37,135
Reconciliation of plan assets:
Fair value of plan assets at beginning of year	28,530	31,166
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	2,839	545
Defined Benefit Plan, Plan Assets, Contributions by Employer	421	108
Defined Benefit Plan, Plan Assets, Benefits Paid	(3,336)	(3,289)
Fair value of plan assets at end of year	28,454	28,530	$ 31,166
Funded status of the plans (underfunded)	$ (4,402)	$ (4,674)