ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI by Components) (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2018	Nov. 30, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (93,677)	$ (81,513)
Other comprehensive income before reclassifications	(9,720)	2,848
Amounts reclassified from AOCI	1,525	519
Income taxes	(329)	(196)
Other comprehensive income (loss)	(8,524)	3,171
Ending balance	(102,201)	(78,342)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(92,637)	(80,778)
Other comprehensive income before reclassifications	(9,657)	2,835
Amounts reclassified from AOCI	(99)	0
Income taxes	0	0
Other comprehensive income (loss)	(9,756)	2,835
Ending balance	(102,393)	(77,943)
Unrealized Gain (Loss) on Derivatives
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	1,356	1,587
Other comprehensive income before reclassifications	(52)	13
Amounts reclassified from AOCI	(42)	(146)
Income taxes	17	38
Other comprehensive income (loss)	(77)	(95)
Ending balance	1,279	1,492
Defined Benefit Obligation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(2,396)	(2,322)
Other comprehensive income before reclassifications	(11)	0
Amounts reclassified from AOCI	1,666	665
Income taxes	(346)	(234)
Other comprehensive income (loss)	1,309	431
Ending balance	$ (1,087)	$ (1,891)