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Restructuring Plan (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Oct. 05, 2018
Aug. 31, 2018
Aug. 31, 2017
Aug. 31, 2018
Aug. 31, 2017
Restructuring Plan          
Restructuring charges   $ 859 $ 0 $ 2,584 $ 0
Project Refuel          
Restructuring Plan          
Restructuring charges   859   2,584  
Cash restructuring payments   500   1,600  
Restructuring liability   1,600   1,600  
Restructuring and Related Cost, Incurred Cost   $ 4,400   4,400  
Minimum | Project Refuel          
Restructuring Plan          
Targeted annualized profit improvement       8,000  
Maximum | Project Refuel          
Restructuring Plan          
Targeted annualized profit improvement       $ 10,000  
Scenario, Forecast | Minimum | Project Refuel          
Restructuring Plan          
Restructuring charges $ 4,400        
Scenario, Forecast | Maximum | Project Refuel          
Restructuring Plan          
Restructuring charges $ 5,500