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Debt (Details)
3 Months Ended 6 Months Ended
Aug. 31, 2019
USD ($)
Sep. 01, 2018
USD ($)
Aug. 31, 2019
CAD ($)
Aug. 31, 2019
USD ($)
Mar. 02, 2019
CAD ($)
Mar. 02, 2019
USD ($)
Line of Credit Facility [Line Items]            
Term Loan       $ 150,000,000    
Interest payments $ 5,300,000 $ 4,300,000        
Revolving credit facility            
Line of Credit Facility [Line Items]            
Total debt outstanding       272,800,000   $ 245,800,000
Maximum borrowing capacity     $ 12,000,000.0 235,000,000    
Outstanding borrowings       102,000,000.0 $ 0 $ 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