Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2026	Aug. 31, 2025	Aug. 31, 2024	Aug. 31, 2023
Significant Accounting Policies [Line Items]
Portion of inventory determined using last-in, first-out ("LIFO") method	46.60%	47.30%
Inventory LIFO reserve	$ 17,000	$ 18,100
Depreciation Expense	11,200	10,100	$ 10,000
Standard and Extended Product Warranty Accrual	1,100	1,100	500
Standard and Extended Product Warranty Accrual, Increase for Warranties Issued	900	1,200
Standard and Extended Product Warranty Accrual, Decrease for Payments	(900)	(1,100)
Standard and Extended Product Warranty Accrual, Increase from Business Combination	0	400
Standard and Extended Product Warranty Accrual, Foreign Currency Translation Gain (Loss)	0	100
Accounts Receivable, allowance for doubtful accounts	3,000	3,800
Research and development costs	15,400	14,500	12,400
Interest Income, Other	1,900	2,300	2,500
AOCI - Foreign currency translation adjustments, net of tax	87,700	89,000
AOCI - Pension and other postretirement benefit plans, net of tax	(12,800)	(15,100)
Accumulated other comprehensive loss	453,100	433,700	392,000	$ 326,600
Operating Lease, Right-of-Use Asset	36,400	35,400
Retained earnings	291,000	284,100
Foreign Currency Transaction Gain (Loss), before Tax	1,600	1,600	2,100
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax	(400)	0
Effect of LIFO Inventory Liquidation on Income	$ 1,700
Minimum | Buildings and improvements
Significant Accounting Policies [Line Items]
Property, plant and equipment useful life	10 years
Minimum | Machinery and equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment useful life	2 years
Maximum | Buildings and improvements
Significant Accounting Policies [Line Items]
Property, plant and equipment useful life	40 years
Maximum | Machinery and equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment useful life	15 years
Accumulated Other Comprehensive Loss
Significant Accounting Policies [Line Items]
Accumulated other comprehensive loss	$ (100,100)	$ (104,100)	$ (116,400)	$ (121,200)