Summary of Financial Information by Reportable Segment and Product Line (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	Aug. 31, 2020
Segment Reporting Information [Line Items]
Net Sales	$ 119,430	$ 146,674
Operating Profit (Loss)	9,069	14,369
Assets	838,575		$ 824,294
Assets of continuing operations	838,575		824,294
Industrial Tools & Services [Member] [Domain]
Segment Reporting Information [Line Items]
Net Sales	112,175	135,592
Operating Profit (Loss)	17,157	26,055
Assets	600,629		592,086
Products [Member]
Segment Reporting Information [Line Items]
Net Sales	82,573	96,363
Service & Rental [Member]
Segment Reporting Information [Line Items]
Net Sales	29,602	39,229
Other Operating Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	7,255	11,082
Operating Profit (Loss)	(1,809)	(255)
Assets	61,391		61,105
General Corporate
Segment Reporting Information [Line Items]
Operating Profit (Loss)	(6,279)	$ (11,431)
Assets	$ 176,555		$ 171,103