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Financial Instruments (Details 3) - USD ($)
$ in Thousands
May 30, 2020
Feb. 29, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market funds $ 3,689 $ 2,689
Commercial paper 500 1,500
Municipal and corporate bonds 12,993 11,967
Cash surrender value of life insurance 15,777 16,560
Deferred compensation 13,889 14,042
Foreign currency forward/option contract 239 340
Interest rate swap contract 1,085 561
Quoted Prices in Active Markets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market funds 3,689 2,689
Commercial paper   0
Municipal and corporate bonds   0
Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Money market funds 0 0
Commercial paper 500 1,500
Municipal and corporate bonds 12,993 11,967
Cash surrender value of life insurance 15,777 16,560
Deferred compensation 13,889 14,042
Foreign currency forward/option contract 239 340
Interest rate swap contract $ 1,085 $ 561