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Restructuring Plan (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 41 Months Ended
Aug. 31, 2020
Aug. 31, 2019
Aug. 31, 2020
Aug. 31, 2019
Feb. 28, 2021
Restructuring Plan          
Restructuring charges $ 34 $ 430 $ 367 $ 1,049  
Cash restructuring payments for the reporting period 100 $ 900 700 $ 1,500  
Project Refuel          
Restructuring Plan          
Restructuring charges     400    
Incurred pre-tax restructuring costs 9,100   9,100    
Cash restructuring payments to date     8,700    
Restructuring liability $ 400   $ 400    
Scenario, Forecast | Project Refuel          
Restructuring Plan          
Restructuring and Related Cost, Expected Cost         $ 9,500
Scenario, Forecast | Minimum | Project Refuel          
Restructuring Plan          
Targeted annualized profit improvement         9,000
Scenario, Forecast | Maximum | Project Refuel          
Restructuring Plan          
Targeted annualized profit improvement         $ 11,000