Summary of Financial Information by Reportable Segment and Product Line (Detail) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2022	Aug. 31, 2021	Aug. 31, 2020
Segment Reporting Information [Line Items]
Net sales	$ 571,223	$ 528,660	$ 493,292
Operating profit (loss)	30,660	51,113	24,181
Depreciation and amortization	19,600	21,611	20,720
Capital Expenditure	8,417	12,019	12,053
Assets	757,312	820,247
Assets of Continuing Operations	757,312	820,247
Products [Member]
Segment Reporting Information [Line Items]
Net sales	454,126	411,888	379,899
Service & Rental [Member]
Segment Reporting Information [Line Items]
Net sales	117,097	116,772	113,393
Industrial Tools & Services [Member] [Domain]
Segment Reporting Information [Line Items]
Net sales	527,342	493,125	454,863
Operating profit (loss)	78,735	81,683	65,549
Depreciation and amortization	14,498	15,856	14,854
Capital Expenditure	7,139	10,918	7,282
Assets	618,412	641,256
Industrial Tools & Services [Member] [Domain] | Product
Segment Reporting Information [Line Items]
Net sales	410,245	376,353	341,470
Industrial Tools & Services [Member] [Domain] | Service & Rental [Member]
Segment Reporting Information [Line Items]
Net sales	117,097	116,772	113,393
Other Operating Segment [Member]
Segment Reporting Information [Line Items]
Net sales	43,881	35,535	38,429
Operating profit (loss)	729	(10,420)	(3,420)
Depreciation and amortization	3,664	3,568	3,620
Capital Expenditure	710	768	2,625
Assets	46,428	52,745
General Corporate
Segment Reporting Information [Line Items]
Operating profit (loss)	(48,804)	(20,150)	(37,948)
Depreciation and amortization	1,438	2,187	2,246
Capital Expenditure	568	333	$ 2,146
Assets	$ 92,472	$ 126,246