ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI by Components) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2019	May 31, 2018	May 31, 2019	May 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (100,887)	$ (66,466)	$ (93,677)	$ (81,513)
Other comprehensive income before reclassifications	(5,227)	(26,418)	(14,493)	(11,609)
Amounts reclassified from AOCI	(162)	1,249	2,192	1,661
Income taxes	51	13	(247)	(161)
Other comprehensive loss	(5,338)	(25,156)	(12,548)	(10,109)
Ending balance	(106,225)	(91,622)	(106,225)	(91,622)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(100,943)	(66,000)	(92,637)	(80,778)
Other comprehensive income before reclassifications	(5,135)	(26,434)	(14,278)	(11,656)
Amounts reclassified from AOCI	19	1,328	856	1,328
Income taxes	0	0	0	0
Other comprehensive loss	(5,116)	(25,106)	(13,422)	(10,328)
Ending balance	(106,059)	(91,106)	(106,059)	(91,106)
Unrealized Gain (Loss) on Derivatives
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	1,151	1,432	1,356	1,587
Other comprehensive income before reclassifications	(86)	16	(190)	47
Amounts reclassified from AOCI	(181)	(70)	(330)	(314)
Income taxes	51	11	99	69
Other comprehensive loss	(216)	(43)	(421)	(198)
Ending balance	935	1,389	935	1,389
Defined Benefit Obligation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(1,095)	(1,898)	(2,396)	(2,322)
Other comprehensive income before reclassifications	(6)	0	(25)	0
Amounts reclassified from AOCI	0	(9)	1,666	647
Income taxes	0	2	(346)	(230)
Other comprehensive loss	(6)	(7)	1,295	417
Ending balance	$ (1,101)	$ (1,905)	$ (1,101)	$ (1,905)