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Debt (Details)
$ in Millions
3 Months Ended 9 Months Ended
Nov. 30, 2019
USD ($)
Dec. 01, 2018
USD ($)
Nov. 30, 2019
CAD ($)
Nov. 30, 2019
USD ($)
Mar. 02, 2019
USD ($)
Line of Credit Facility [Line Items]          
Term Loan       $ 150,000,000  
Interest payments $ 7,300,000 $ 7,200,000      
Letter of credit          
Line of Credit Facility [Line Items]          
Debt       24,700,000  
Revolving credit facility          
Line of Credit Facility [Line Items]          
Total debt outstanding       251,300,000 $ 245,800,000
Maximum borrowing capacity     $ 12.0 235,000,000  
Outstanding borrowings     $ 0.0 80,500,000 $ 225,000,000.0
Industrial Revenue Bonds          
Line of Credit Facility [Line Items]          
Debt       20,400,000  
Canada | Industrial Revenue Bonds          
Line of Credit Facility [Line Items]          
Debt       $ 400,000