Pension Plans and Other Postretirement Benefits (Tables)

6 Months Ended

Mar. 27, 2021

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Costs

The following table provides the components of net periodic benefit costs:

	Pension Benefits
	Three Months Ended						Six Months Ended
	March 27,			March 28,			March 27,			March 28,
	2021			2020			2021			2020
Interest cost	$	534		$	720		$	1,068		$	1,440
Expected return on plan assets		(319	)		(320	)		(638	)		(640	)
Amortization of net loss		898			862			1,796			1,724
Pension settlement charge		570			—			570			—
Net periodic benefit cost	$	1,683		$	1,262		$	2,796		$	2,524

	Postretirement Benefits
	Three Months Ended						Six Months Ended
	March 27,			March 28,			March 27,			March 28,
	2021			2020			2021			2020
Interest cost	$	19		$	38		$	38		$	75
Amortization of prior service credits		(125	)		(125	)		(249	)		(249	)
Amortization of net (gain)		(180	)		(196	)		(361	)		(393	)
Net periodic benefit cost	$	(286	)	$	(283	)	$	(572	)	$	(567	)