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Restructuring and Related Charges - Liability Activity, Primarily Associated with 2017 Restructuring Plan (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
May 31, 2019
May 31, 2018
May 31, 2019
May 31, 2018
Restructuring Reserve [Roll Forward]        
Restructuring and related charges $ 9,340 $ 12,647 $ 16,182 $ 29,462
Employee severance and benefit costs        
Restructuring Reserve [Roll Forward]        
Restructuring and related charges 6,513 5,058 15,460 11,048
Lease costs        
Restructuring Reserve [Roll Forward]        
Restructuring and related charges (50) 1,589 (41) 1,596
Asset write-off costs        
Restructuring Reserve [Roll Forward]        
Restructuring and related charges (343) $ 5,575 (3,555) $ 14,838
2017 Restructuring Plan        
Restructuring Reserve [Roll Forward]        
Liability, Beginning Balance     21,337  
Restructuring and related charges     13,333  
Asset write-off charge and other non-cash activity     3,210  
Cash payments     (25,536)  
Liability, Ending Balance 12,344   12,344  
2017 Restructuring Plan | Employee severance and benefit costs        
Restructuring Reserve [Roll Forward]        
Liability, Beginning Balance     18,131  
Restructuring and related charges     15,460  
Asset write-off charge and other non-cash activity     (331)  
Cash payments     (23,811)  
Liability, Ending Balance 9,449   9,449  
2017 Restructuring Plan | Lease costs        
Restructuring Reserve [Roll Forward]        
Liability, Beginning Balance     2,684  
Restructuring and related charges     (41)  
Asset write-off charge and other non-cash activity     0  
Cash payments     (450)  
Liability, Ending Balance 2,193   2,193  
2017 Restructuring Plan | Asset write-off costs        
Restructuring Reserve [Roll Forward]        
Liability, Beginning Balance     0  
Restructuring and related charges     (3,555)  
Asset write-off charge and other non-cash activity     3,555  
Cash payments     0  
Liability, Ending Balance 0   0  
2017 Restructuring Plan | Other Related Costs        
Restructuring Reserve [Roll Forward]        
Liability, Beginning Balance     522  
Restructuring and related charges     1,469  
Asset write-off charge and other non-cash activity     (14)  
Cash payments     (1,275)  
Liability, Ending Balance $ 702   $ 702