Pension and Other Postretirement Benefits - Other Postretirement Benefits (Details) - Other Postretirement Benefit Plan - USD ($) $ in Thousands	3 Months Ended
Mar. 27, 2022	Mar. 28, 2021
Pension Benefits
Service cost	$ 12	$ 13
Interest cost	183	141
Amortization of actuarial loss	823	852
Amortization of prior service credit	(236)	(836)
Net periodic postretirement benefit cost	$ 782	$ 170

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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