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General (Details 3) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2019	Mar. 29, 2018
Summary of Significant Accounting Policies [Line Items]
Service cost	$ 209	$ 232
Interest cost	371	341
Net amortization of prior service cost and actuarial loss	109	155
Net periodic pension cost	$ 689	$ 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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- References

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X

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
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- Definition

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

+ References

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- Definition

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

+ References

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