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Income Taxes (Reconciliation of The Federal Statutory Tax Rate With The Effective Tax Rate from Continuing Operations) (Details)	12 Months Ended
	Dec. 27, 2019	Dec. 28, 2018	Dec. 29, 2017
Income Tax Disclosure [Abstract]
U.S statutory income tax expense rate	21.00%	21.00%	35.00%
State income taxes, net of federal income tax expense	4.30%	2.60%	1.50%
Valuation reduction	1.20%		0.20%
Tax reform impact on deferred taxes			(14.40%)
Meals and entertainment	0.50%	1.00%	1.00%
Foreign rate differential		0.20%	(3.00%)
Share based compensation	(1.30%)	(3.60%)	(12.20%)
Purchase accounting	(0.80%)	(3.10%)	1.20%
Foreign exchange loss	0.20%	(0.30%)	0.40%
Other, net	(0.10%)	(0.90%)	(0.60%)
Effective tax rate	25.00%	16.90%	9.10%

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Effective income tax rate reconciliation foreign exchange gain loss.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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