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General - Defined Benefit Plan (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2021	Jun. 25, 2020	Jul. 01, 2021	Jun. 25, 2020
General
Service cost	$ 280	$ 273	$ 561	$ 547
Interest cost	301	344	601	686
Net amortization of prior service cost and actuarial loss	327	247	655	495
Net periodic pension cost	$ 908	$ 864	$ 1,817	$ 1,728

X

- Definition

The amount of the prior service cost in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation and actuarial losses.

+ References

No definition available.

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X

- Definition

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

+ References

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- Definition

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

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- Definition

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

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