Income Taxes (Income Tax Expense (Benefit)) (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2015
Income Taxes [Abstract]
Current U.S. - Federal income taxes	$ 2,436	$ (649)	$ 1,169
Current U.S. - State income taxes	12	(166)	164
Current Non-U.S. income taxes	188,872	157,069	147,199
Total current income taxes	191,320	156,254	148,532
Deferred U.S. - Federal income taxes	253	73	(1,653)
Deferred U.S. - State income taxes	30	9	(300)
Deferred Non-U.S. income taxes	(62,537)	(24,187)	(9,118)
Total deferred income taxes	(62,254)	(24,105)	(11,071)
Total U.S - Federal income taxes	2,689	(576)	(484)
Total U.S - State income taxes	42	(157)	(136)
Total Non-U.S income taxes	126,335	132,882	138,081
Total income tax expense	$ 129,066	$ 132,149	$ 137,461