Basis of Presentation Basis of Presentation (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	May 31, 2018	May 31, 2018	Aug. 31, 2017
Accounting Policies [Abstract]
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation	$ 100	$ 1,600
Excess Tax Benefit from Share-based Compensation, Operating Activities		600
Condensed Statement of Income Captions [Line Items]
AOCI - Foreign Currency Translation Adjustment, net of tax	145,319	145,319	$ 207,804
AOCI - Pension and other postretirement benefit plans, net of tax	18,861	18,861	19,457
Total shareholders’ equity	(601,028)	(601,028)	(500,539)
AOCI Attributable to Parent [Member]
Condensed Statement of Income Captions [Line Items]
Total shareholders’ equity	$ 164,180	$ 164,180	$ 227,261