Retirement Plans (Details) - Defined Benefit Pension Plan - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 01, 2018	Dec. 02, 2017	Dec. 01, 2018	Dec. 02, 2017
Net periodic pension expense
Service cost	$ (12)	$ 346	$ 612	$ 1,038
Interest cost	1,522	1,603	4,678	4,809
Expected return on plan assets	(1,415)	(1,147)	(4,285)	(3,441)
Amortization of unrecognized net loss	393	856	1,407	2,569
Net periodic pension expense	488	$ 1,658	2,412	$ 4,975
Employer contributions	911		2,715
Expected employer contribution during the remainder of fiscal year	$ 0		$ 0