Financial Instruments Financial Instruments (Details 3) - USD ($) $ in Thousands	Feb. 26, 2022	Feb. 27, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	$ 19,288	$ 26,034
Municipal and corporate bonds	11,784	12,893
Cash surrender value of life insurance	17,831	18,632
Deferred Compensation Liab FV Disclosure	12,491	13,507
Quoted Prices in Active Markets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds	19,288	26,034
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
Municipal and corporate bonds	11,784	12,893
Cash surrender value of life insurance	17,831	18,632
Deferred Compensation Liab FV Disclosure	12,491	13,507
Foreign Exchange Forward [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, Fair Value, Net	161	606
Foreign Exchange Forward [Member] | Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, Fair Value, Net	161
Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	718
Derivative Liability		504
Interest Rate Swap [Member] | Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	718
Derivative Liability		504
Aluminum Hedging Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	2,133	363
Aluminum Hedging Contract | Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset	$ 2,133	363
Derivative, Fair Value, Net		$ 606