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Restructuring Plan - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Feb. 29, 2020
Nov. 30, 2019
Aug. 31, 2019
May 31, 2019
Feb. 28, 2019
Nov. 30, 2018
Aug. 31, 2018
May 31, 2018
Feb. 29, 2020
Feb. 28, 2019
Feb. 28, 2018
Restructuring Plan                      
Restructuring charges $ 2,252 $ 12 $ 430 $ 619 $ 977 $ 25 $ 859 $ 1,725 $ 3,313 $ 3,586 $ 1,857
Restructuring liability 800               800    
Cash restructuring payments                 8,000    
Project Refuel                      
Restructuring Plan                      
Expected restructuring costs $ 9,500               9,500    
Restructuring charges                 8,700    
Cash restructuring payments to date                 3,800    
Minimum | Project Refuel                      
Restructuring Plan                      
Targeted annualized profit improvement                 9,000    
Maximum | Project Refuel                      
Restructuring Plan                      
Targeted annualized profit improvement                 $ 11,000