Retirement Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	May. 30, 2015	May. 31, 2014
Defined Benefit Pension Plan
Net periodic pension expense
Service cost	$ 512	$ 793
Interest cost	1,633	1,631
Expected return on plan assets	(1,593)	(1,929)
Amortization of unrecognized prior service cost	17	60
Amortization of unrecognized net loss (gain)	978	599
Net pension expense	1,547	1,154
Employer contributions	0
Expected employer contribution during the remainder of fiscal year	0
Nonqualified Executive Retirement Plan
Net periodic pension expense
Interest cost	119	135
Net pension expense	119	$ 135
Employer contributions	377
Expected employer contribution during the remainder of fiscal year	$ 1,173