Summary of Financial Information by Reportable Segment and Product Line (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019	Aug. 31, 2019
Segment Reporting Information [Line Items]
Net Sales	$ 101,879	$ 178,095	$ 381,939	$ 496,435
Operating Profit (Loss)	(1,998)	38,179	20,938	42,066
Assets	851,535		851,535		$ 1,124,274
Assets of continuing operations	851,535		851,535		838,696
Industrial Tools & Services [Member] [Domain]
Segment Reporting Information [Line Items]
Net Sales	92,865	166,732	351,819	464,908
Operating Profit (Loss)	7,639	34,877	54,263	87,797
Assets	622,113		622,113		553,615
Products [Member]
Segment Reporting Information [Line Items]
Net Sales	67,957	115,067	257,685	323,420
Service & Rental [Member]
Segment Reporting Information [Line Items]
Net Sales	24,908	51,665	94,134	141,488
Other Operating Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	9,014	11,363	30,120	31,527
Operating Profit (Loss)	(790)	13,072	(2,017)	(13,336)
Assets	62,105		62,105		54,484
General Corporate
Segment Reporting Information [Line Items]
Operating Profit (Loss)	(8,847)	$ (9,770)	(31,308)	$ (32,395)
Assets	$ 167,317		$ 167,317		$ 230,597