Postretirement Benefits (Tables)

6 Months Ended

Mar. 27, 2020

Retirement Benefits [Abstract]

Schedule of Net Periodic Benefit Cost

The net periodic benefit credit was as follows: 

		Three months ended						Six months ended
(in thousands)	Note	March 27, 2020			March 29, 2019			March 27, 2020			March 29, 2019
Interest cost		$	935		$	1,166		$	1,870		$	2,332
Expected return on plan assets		(1,583		)	(1,593		)	(3,166		)	(3,186		)
Amortization of actuarial loss		222			25			444			50
Net periodic benefit credit	7	$	(426	)	$	(402	)	$	(852	)	$	(804	)