Retirement Plans (Tables)

6 Months Ended

Aug. 31, 2013

Retirement Plans

Summary of net periodic pension expense for the defined benefit plans

	Defined Benefit Pension Plan						Nonqualified Executive Retirement Plans				Defined Benefit Pension Plan						Nonqualified Executive Retirement Plans
	Thirteen Week Period Ended										Twenty-Six Week Period Ended
	August 31, 2013			September 1, 2012			August 31, 2013		September 1, 2012		August 31, 2013			September 1, 2012			August 31, 2013		September 1, 2012
Service cost	$	830		$	867		$	—	$	—	$	1,660		$	1,735		$	—	$	—
Interest cost		1,551			1,565			135		154		3,102			3,131			271		308
Expected return on plan assets		(1,779	)		(1,749	)		—		—		(3,558	)		(3,498	)		—		—
Amortization of unrecognized prior service cost		60			60			—		—		120			120			—		—
Amortization of unrecognized net loss		1,202			959			—		—		2,405			1,919			—		—
Net pension expense	$	1,864		$	1,702		$	135	$	154	$	3,729		$	3,407		$	271	$	308