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, 2025	Aug. 31, 2024	Aug. 31, 2023
Reconciliation of plan assets:
Fair value of plan assets at beginning of year	$ 28,454
Fair value of plan assets at end of year	27,953	$ 28,454
Fixed Income Securities
Reconciliation of plan assets:
Fair value of plan assets at beginning of year	15,415
Fair value of plan assets at end of year	14,591	15,415
Foreign Plan Member
Reconciliation of benefit obligations:
Benefit obligation at beginning of year	8,510	8,085
Interest cost	352	344	$ 306
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(873)	1
Defined Benefit Plan, Benefit Obligation, Benefits Paid	(294)	(261)
Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss)	400	(199)
Benefit obligation at end of year	8,166	8,510	8,085
Defined Benefit Plan, Service Cost	71	144	60
Reconciliation of plan assets:
Fair value of plan assets at beginning of year	6,495	6,196
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	(90)	323
Defined Benefit Plan, Plan Assets, Contributions by Employer	58	69
Defined Benefit Plan, Plan Assets, Benefits Paid	(294)	(261)
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	280	168
Fair value of plan assets at end of year	6,449	6,495	6,196
Funded status of the plans (underfunded)	(1,717)	(2,014)
Domestic Plan Member
Reconciliation of benefit obligations:
Benefit obligation at beginning of year	32,856	33,204
Interest cost	1,565	1,716	1,694
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(872)	1,273
Defined Benefit Plan, Benefit Obligation, Benefits Paid	(3,368)	(3,337)
Benefit obligation at end of year	30,181	32,856	33,204
Reconciliation of plan assets:
Fair value of plan assets at beginning of year	28,454	28,530
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	1,626	2,839
Defined Benefit Plan, Plan Assets, Contributions by Employer	1,241	421
Defined Benefit Plan, Plan Assets, Benefits Paid	(3,368)	(3,336)
Fair value of plan assets at end of year	27,953	28,454	$ 28,530
Funded status of the plans (underfunded)	$ (2,228)	$ (4,402)