Summary of Financial Information by Reportable Segment and Product Line (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2021	May 31, 2020	Aug. 31, 2020
Segment Reporting Information [Line Items]
Net Sales	$ 143,149	$ 101,879	$ 383,233	$ 381,939
Operating Profit (Loss)	22,747	(1,998)	37,524	20,938
Assets	842,702		842,702		$ 824,294
Industrial Tools & Services [Member] [Domain]
Segment Reporting Information [Line Items]
Net Sales	133,400	92,865	358,314	351,819
Operating Profit (Loss)	23,812	7,639	54,826	54,263
Assets	656,165		656,165		592,086
Products [Member]
Segment Reporting Information [Line Items]
Net Sales	102,224	67,957	271,992	257,685
Service & Rental [Member]
Segment Reporting Information [Line Items]
Net Sales	31,176	24,908	86,322	94,134
Other Operating Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	9,749	9,014	24,919	30,120
Operating Profit (Loss)	(65)	(790)	(3,747)	(2,017)
Assets	59,403		59,403		61,105
General Corporate
Segment Reporting Information [Line Items]
Operating Profit (Loss)	(1,000)	$ (8,847)	(13,555)	$ (31,308)
Assets	$ 127,134		$ 127,134		$ 171,103