Pension plan (Tables)

6 Months Ended

Dec. 27, 2014

Compensation and Retirement Disclosure [Abstract]

Components of net periodic pension costs

The Company has a noncontributory defined benefit pension plan (the “Plan”) for which the components of net periodic pension costs during the second quarters and six months ended December 27, 2014 and December 28, 2013 were as follows:

	Second Quarters Ended						Six Months Ended
	December 27, 2014			December 28, 2013			December 27, 2014			December 28, 2013
	(Thousands)
Service cost	$	9,873		$	9,183		$	19,746		$	18,366
Interest cost	4,449			4,289			8,898			8,578
Expected return on plan assets	(9,055		)	(7,727		)	(18,110		)	(15,454		)
Recognized net actuarial loss	3,251			3,171			6,502			6,342
Amortization of prior service credit	(393		)	(393		)	(786		)	(786		)
Net periodic pension cost	$	8,125		$	8,523		$	16,250		$	17,046