Retirement Plans (Tables)

6 Months Ended

Aug. 27, 2016

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 27, 2016			August 29, 2015			August 27, 2016		August 29, 2015		August 27, 2016			August 29, 2015			August 27, 2016		August 29, 2015
Service cost	$	292		$	513		$	—	$	—	$	584		$	1,025		$	—	$	—
Interest cost	1,621			1,634			109		119		3,242			3,267			218		237
Expected return on plan assets	(1,142		)	(1,593		)	—		—		(2,284		)	(3,186		)	—		—
Amortization of unrecognized prior service cost	—			18			—		—		—			34			—		—
Amortization of unrecognized net loss	1,132			978			—		—		2,264			1,957			—		—
Net pension expense	$	1,903		$	1,550		$	109	$	119	$	3,806		$	3,097		$	218	$	237