Basis of Presentation Basis of Presentation (Details) - USD ($) $ in Thousands	May 31, 2021	Feb. 28, 2021	Aug. 31, 2020	May 31, 2020	Feb. 29, 2020	Aug. 31, 2019
Condensed Statement of Income Captions [Line Items]
Foreign currency translation adjustments	$ 59,089		$ 75,896
Pension and other postretirement benefit plans, net of tax	24,281		24,750
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax	30		78
Total shareholders’ equity	(416,911)	$ (381,393)	(359,226)	$ (336,282)	$ (354,365)	$ (301,179)
AOCI Attributable to Parent [Member]
Condensed Statement of Income Captions [Line Items]
Total shareholders’ equity	$ 83,400	$ 89,938	$ 100,724	$ 124,050	$ 117,464	$ 171,672