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Restructuring Charges (Details) - USD ($)
$ in Thousands
3 Months Ended
Nov. 30, 2019
Nov. 30, 2018
Restructuring Cost and Reserve [Line Items]    
Document Period End Date Nov. 30, 2019  
Restructuring Reserve [Roll Forward]    
Restructuring Charges $ 1,972 $ (29)
Industrial Tools & Services [Member] [Domain]    
Restructuring Reserve [Roll Forward]    
Beginning Balance 2,912 1,687
Restructuring Charges 1,230 (29)
Cash payments (1,851) (922)
Other non-cash uses of reserve (39) (13)
Impact of changes in foreign currency rates 2 (21)
Ending Balance 2,254 702
General Corporate    
Restructuring Reserve [Roll Forward]    
Beginning Balance 0 46
Restructuring Charges 235 0
Cash payments (1) (46)
Other non-cash uses of reserve (226) 0
Impact of changes in foreign currency rates 0 0
Ending Balance 8 0
Reportable Segments [Member]    
Restructuring Reserve [Roll Forward]    
Beginning Balance 2,912 1,733
Restructuring Charges 1,465 (29)
Cash payments (1,852) (968)
Other non-cash uses of reserve (265) (13)
Impact of changes in foreign currency rates 2 (21)
Ending Balance 2,262 $ 702
Other Operating Segment [Member]    
Restructuring Reserve [Roll Forward]    
Beginning Balance 900  
Restructuring Charges 500  
Ending Balance $ 1,300