Restructuring Plan (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		50 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Feb. 28, 2022
Restructuring Plan
Restructuring charges	$ 5	$ (12)	$ 380	$ 355
Project Refuel
Restructuring Plan
Incurred pre-tax restructuring costs	9,600		9,600		$ 9,600
Restructuring charges	400
Cash restructuring payments for the reporting period	$ 100		$ 500
Cash restructuring payments to date					9,600
Minimum | Project Refuel
Restructuring Plan
Targeted annualized profit improvement					10,500
Maximum | Project Refuel
Restructuring Plan
Targeted annualized profit improvement					$ 12,500
Scenario, Forecast | Project Refuel
Restructuring Plan
Expected restructuring costs						$ 10,300