Retirement Plans - Benefit obligation and funded status (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 04, 2023	Feb. 26, 2022	Feb. 27, 2021
Estimated amounts that will be amortized from accumulated other comprehensive loss into net periodic pension expense
Net actuarial loss	$ 0
Prior service cost	0
Defined Benefit Pension Plan
Change in benefit obligations:
Benefit obligation at end of prior year	160,133	$ 168,872
Service cost	336	425	$ 486
Interest cost	5,036	4,861	4,753
Distributions	(8,328)	(8,582)
Actuarial gain	(26,014)	(5,443)
Benefit obligation at end of year	131,163	160,133	168,872
Change in plan assets:
Fair value of plan assets at beginning of year	149,527	148,412
Employer contributions	0	1,700	6,305
Actual return on plan assets	(20,430)	7,997
Distributions (including expenses paid by the plan)	(8,328)	(8,582)
Fair value of plan assets at end of year	120,769	149,527	$ 148,412
Funded status	(10,394)	(10,606)
Amounts recognized in consolidated balance sheets consisted of:
Accrued pension liability	(10,394)	(10,606)
Net amount recognized in balance sheet	(10,394)	(10,606)
Amounts recognized in accumulated other comprehensive loss consist of:
Net actuarial loss	11,202	(11,787)
Amount recognized in other comprehensive income	11,202	(11,787)
Estimated amounts that will be amortized from accumulated other comprehensive loss into net periodic pension expense
Accumulated benefit obligation	$ 131,163	$ 160,133