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Debt (Details)
$ in Millions
3 Months Ended 9 Months Ended
Nov. 28, 2020
USD ($)
Nov. 28, 2020
USD ($)
Nov. 30, 2019
USD ($)
Nov. 28, 2020
CAD ($)
Feb. 29, 2020
USD ($)
Line of Credit Facility [Line Items]          
Term Loan $ 150,000,000 $ 150,000,000      
Interest payments   3,700,000 $ 7,300,000    
Letter of credit          
Line of Credit Facility [Line Items]          
Debt 18,700,000 18,700,000      
Revolving credit facility          
Line of Credit Facility [Line Items]          
Total debt outstanding 168,500,000 168,500,000     $ 217,900,000
Maximum borrowing capacity 235,000,000 235,000,000      
Outstanding borrowings 0 0     47,500,000
Industrial Revenue Bonds          
Line of Credit Facility [Line Items]          
Debt 15,000,000.0 15,000,000.0      
Repayment Recovery Zone Facility Bonds 5,400,000        
Canada | Revolving credit facility          
Line of Credit Facility [Line Items]          
Maximum borrowing capacity       $ 25.0  
Outstanding borrowings $ 3,500,000 $ 3,500,000     $ 0