Basis of Presentation Basis of Presentation (Details) - USD ($) $ in Thousands	May 31, 2020	Feb. 29, 2020	Aug. 31, 2019	May 31, 2019	Feb. 28, 2019	Aug. 31, 2018
Condensed Statement of Income Captions [Line Items]
Foreign currency translation adjustments	$ 100,654		$ 151,115
Pension and other postretirement benefit plans, net of tax	23,396		20,557
Total shareholders’ equity	(336,282)	$ (354,365)	(301,179)	$ (607,424)	$ (585,630)	$ (558,712)
AOCI Attributable to Parent [Member]
Condensed Statement of Income Captions [Line Items]
Total shareholders’ equity	$ 124,050	$ 117,464	$ 171,672	$ 153,552	$ 139,752	$ 174,245