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Debt (Details)
3 Months Ended 6 Months Ended
Sep. 02, 2017
USD ($)
Sep. 02, 2017
CAD
Aug. 27, 2016
USD ($)
Sep. 02, 2017
USD ($)
Mar. 04, 2017
CAD
Mar. 04, 2017
USD ($)
Line of Credit Facility [Line Items]            
Document Period End Date   Sep. 02, 2017        
Interest payments $ 1,900,000   $ 300,000      
Revolving credit facility            
Line of Credit Facility [Line Items]            
Maximum borrowing capacity   CAD 12,000,000   $ 335,000,000.0    
Outstanding borrowings   CAD 1,800,000   235,200,000 CAD 0 $ 45,000,000
Industrial Revenue Bonds            
Line of Credit Facility [Line Items]            
Debt       20,400,000    
Industrial Revenue Bonds | Letter of credit            
Line of Credit Facility [Line Items]            
Debt       24,900,000    
Canada | Industrial Revenue Bonds            
Line of Credit Facility [Line Items]            
Debt       $ 400,000