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Restructuring, Severance and Related Charges (Liability Activity) (Details) - USD ($)
$ in Thousands
3 Months Ended
Nov. 30, 2020
Nov. 30, 2019
Restructuring Reserve [Roll Forward]    
Restructuring related charges $ (1,715) $ 45,251
Employee Severance and Benefit Costs    
Restructuring Reserve [Roll Forward]    
Restructuring related charges 568 18,781
Lease Costs    
Restructuring Reserve [Roll Forward]    
Restructuring related charges (2,873) 239
Asset Write-off Costs    
Restructuring Reserve [Roll Forward]    
Restructuring related charges (2) $ 16,316
2020 Restructuring Plan    
Restructuring Reserve [Roll Forward]    
Balance as of beginning of period 10,885  
Restructuring related charges (2,114)  
Asset write-off charge and other non-cash activity 1,556  
Cash payments (4,752)  
Balance as of end of period 5,575  
2020 Restructuring Plan | Employee Severance and Benefit Costs    
Restructuring Reserve [Roll Forward]    
Balance as of beginning of period 8,143  
Restructuring related charges 264  
Asset write-off charge and other non-cash activity 0  
Cash payments (4,525)  
Balance as of end of period 3,882  
2020 Restructuring Plan | Lease Costs    
Restructuring Reserve [Roll Forward]    
Balance as of beginning of period 2,316  
Restructuring related charges (2,873)  
Asset write-off charge and other non-cash activity 1,554  
Cash payments (56)  
Balance as of end of period 941  
2020 Restructuring Plan | Asset Write-off Costs    
Restructuring Reserve [Roll Forward]    
Balance as of beginning of period 0  
Restructuring related charges (2)  
Asset write-off charge and other non-cash activity 2  
Cash payments 0  
Balance as of end of period 0  
2020 Restructuring Plan | Other Related Costs    
Restructuring Reserve [Roll Forward]    
Balance as of beginning of period 426  
Restructuring related charges 497  
Asset write-off charge and other non-cash activity 0  
Cash payments (171)  
Balance as of end of period $ 752