Retirement Plans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 02, 2012	May 28, 2011
Defined Benefit Pension Plan
Net periodic pension expense
Service cost	$ 868	$ 838
Interest cost	1,566	1,518
Expected return on plan assets	(1,749)	(1,505)
Amortization of unrecognized prior service cost	60	157
Amortization of unrecognized net loss	960	422
Net pension expense	1,705	1,430
Change in plan assets:
Employer contributions	1,764
Expected employer contribution during the remainder of fiscal 2013	8,001
Nonqualified Executive Retirement Plan
Net periodic pension expense
Service cost		5
Interest cost	154	193
Net pension expense	154	198
Change in plan assets:
Employer contributions	399
Expected employer contribution during the remainder of fiscal 2013	$ 1,243