Benefit Plans - Amounts Recognized in Accumulated Other Comprehensive Income (Loss), Pre-tax (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Retirement Benefits [Abstract]
Net actuarial loss	$ 15,635	$ 9,777
Prior service cost	4,273	1,607
Total	19,908	11,384
Estimated net actuarial loss which will be amortized from accumulated other comprehensive income (loss) into benefit cost in 2020	400
Estimated prior service cost which will be amortized from acculated other comprehensive income (loss) into benefit cost in 2020	200
Prior service cost	80
Defined Benefit Plan, Amortization of Net Actuarial Cost	163
Net actuarial loss	243	291	$ 337
Prior service cost	(2,645)
Net actuarial loss	(6,251)
Settlement loss	260	$ 238	$ (25)
Foreign currency adjustments	(131)
Total	$ (8,524)

Defined Benefit Plan, Amortization of Net Actuarial Cost

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Defined Benefit Plan, Foreign Currency Adjustments, Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit

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Defined Benefit Plan, Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit

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Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount of gain (loss), recognized immediately as component of net periodic benefit (cost) credit, for change in value of benefit obligation or plan assets from experience different from that assumed, change in actuarial assumption, or consequence of temporarily deviating from substantive plan. Includes, but is not limited to, amount in excess of ten percent of greater of fair value of plan assets or benefit obligation.

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Amount of cost (credit) included in accumulated other comprehensive (income) loss expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.

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Amount, before tax, of cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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