Financial Instruments Financial Instruments (Details 3) - USD ($) $ in Thousands	Feb. 27, 2021	Feb. 29, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	$ 26,034	$ 2,689
Commercial paper		1,500
Municipal and corporate bonds	12,893	11,967
Cash surrender value of life insurance	18,632	16,560
Deferred Compensation Liab FV Disclosure	13,507	14,042
Quoted Prices in Active Markets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	26,034	2,689
Commercial paper		0
Municipal and corporate bonds	0	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		1,500
Municipal and corporate bonds	12,893	11,967
Cash surrender value of life insurance	18,632	16,560
Deferred Compensation Liab FV Disclosure	13,507	14,042
Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	606
Derivative Liability		340
Foreign Exchange Forward [Member] | Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	606
Derivative Liability		340
Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	504	561
Interest Rate Swap [Member] | Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability	504	$ 561
Aluminum Hedging Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	363
Aluminum Hedging Contract | Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	$ 363