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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (AOCI by Components) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Nov. 30, 2017
Nov. 30, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance $ (81,513) $ (112,914)
Other comprehensive income before reclassifications 2,848 (21,389)
Amounts reclassified from AOCI 519 (248)
Income taxes (196) 39
Other comprehensive income (loss) 3,171 (21,598)
Ending balance (78,342) (134,512)
Foreign Currency Translation    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance (80,778) (112,255)
Other comprehensive income before reclassifications 2,835 (21,531)
Amounts reclassified from AOCI 0 0
Income taxes 0 0
Other comprehensive income (loss) 2,835 (21,531)
Ending balance (77,943) (133,786)
Unrealized Gain (Loss) on Derivatives    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance 1,587 2,186
Other comprehensive income before reclassifications 13 142
Amounts reclassified from AOCI (146) (237)
Income taxes 38 37
Other comprehensive income (loss) (95) (58)
Ending balance 1,492 2,128
Defined Benefit Obligation    
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]    
Beginning balance (2,322) (2,845)
Other comprehensive income before reclassifications 0 0
Amounts reclassified from AOCI 665 (11)
Income taxes (234) 2
Other comprehensive income (loss) 431 (9)
Ending balance $ (1,891) $ (2,854)