Benefit Plans (Tables)

9 Months Ended

Sep. 28, 2019

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

The components of net periodic benefit cost for the three and nine months ended September 28, 2019 and September 29, 2018 were as follows: 

	For the Three Months Ended						For the Nine Months Ended
(in thousands)	September 28, 2019			September 29, 2018			September 28, 2019			September 29, 2018
Components of net periodic benefit cost:
Service cost	$	509		$	533		$	1,523		$	1,599
Interest cost	777			501			2,374			1,503
Expected return on plan assets	(773		)	(540		)	(2,384		)	(1,620		)
Amortization of prior service	60			74			184			222
Net periodic benefit cost	$	573		$	568		$	1,697		$	1,704