ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI by Components) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	$ (112,914)	$ (113,535)	$ (19,509)
Other comprehensive loss before reclassifications	32,190	(9,951)	(87,035)
Amounts reclassified from AOCI	762	(10,432)	7,357
Income taxes	(27)	140	366
Other comprehensive income (loss)	31,401	621	(94,026)
Balance	(81,513)	(112,914)	(113,535)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	(112,255)	(113,081)	(19,891)
Other comprehensive loss before reclassifications	30,509	(11,771)	(83,063)
Amounts reclassified from AOCI	(968)	(12,597)	10,127
Income taxes	0	0	0
Other comprehensive income (loss)	31,477	826	(93,190)
Balance	(80,778)	(112,255)	(113,081)
Unrealized Gain (Loss) on Derivatives
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	2,186	2,305	3,014
Other comprehensive loss before reclassifications	1,003	2,006	(3,702)
Amounts reclassified from AOCI	1,845	2,233	(2,707)
Income taxes	243	108	286
Other comprehensive income (loss)	(599)	(119)	(709)
Balance	1,587	2,186	2,305
Defined Benefit Obligation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance	(2,845)	(2,759)	(2,632)
Other comprehensive loss before reclassifications	678	(186)	(270)
Amounts reclassified from AOCI	(115)	(68)	(63)
Income taxes	(270)	32	80
Other comprehensive income (loss)	523	(86)	(127)
Balance	$ (2,322)	$ (2,845)	$ (2,759)