Pension and Postretirement Benefit Obligations (Tables)

6 Months Ended

Jul. 01, 2018

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Pension Cost

The components of net periodic pension cost were as follows:

	Second Quarter						First Half
(in thousands)	2018			2017			2018			2017
Service cost	$	1,413		$	150		$	2,825		$	300
Interest cost		2,856			2,979			5,712			5,958
Expected return on plan assets		(3,852	)		(3,399	)		(7,704	)		(6,798	)
Recognized net actuarial loss		933			807			1,866			1,614
Amortization of prior service cost		6			7			12			14
Net periodic pension cost	$	1,356		$	544		$	2,711		$	1,088

Components of Net Periodic Postretirement Benefit Cost

The components of net periodic postretirement benefit cost were as follows:

	Second Quarter						First Half
(in thousands)	2018			2017			2018			2017
Service cost	$	503		$	572		$	1,005		$	1,144
Interest cost		696			911			1,392			1,822
Recognized net actuarial loss		499			648			998			1,296
Amortization of prior service cost		(462	)		(746	)		(924	)		(1,492	)
Net periodic postretirement benefit cost	$	1,236		$	1,385		$	2,471		$	2,770