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Benefit Plans (Amount Recognized in Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2018	Dec. 29, 2017	Dec. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Pre-tax adjustment (gain) loss	$ (232)	$ (53)
Tax benefit	(70)	(23)
Net (gain) loss	(302)	(76)	$ 579
Continuing Operations
Defined Benefit Plan Disclosure [Line Items]
Net (gain) loss occurring during the year	(130)	74
Amortization of losses	(101)	(45)
Prior service cost	1	1
Amortization of prior service cost	(2)	(2)
Pre-tax adjustment (gain) loss	(232)	28
Tax benefit	(70)	(5)
Net (gain) loss	$ (302)	$ 23

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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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