Retirement Plans (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	May 31, 2014	Jun. 01, 2013
Defined Benefit Pension Plan
Net periodic pension expense
Service cost	$ 793	$ 829
Interest cost	1,631	1,551
Expected return on plan assets	(1,929)	(1,779)
Amortization of unrecognized prior service cost	60	60
Amortization of unrecognized net loss	599	1,203
Net pension expense	1,154	1,864
Expected employer contribution during the remainder of fiscal 2015	0
Nonqualified Executive Retirement Plan
Net periodic pension expense
Interest cost	135	136
Net pension expense	135	136
Employer contributions	386
Expected employer contribution during the remainder of fiscal 2015	$ 1,256