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Summary of Significant Accounting Policies - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2019	Sep. 28, 2018	Sep. 27, 2019	Sep. 28, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 396,880	$ 361,496	$ 1,165,327	$ 1,050,553
Net Sales | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of total Net sales	100.00%	100.00%	100.00%	100.00%
Center-of-the-Plate
Disaggregation of Revenue [Line Items]
Net sales	$ 176,777	$ 152,805	$ 516,906	$ 454,674
Center-of-the-Plate | Net Sales | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of total Net sales	44.50%	42.30%	44.40%	43.30%
Dry Goods
Disaggregation of Revenue [Line Items]
Net sales	$ 70,255	$ 65,269	$ 206,773	$ 185,244
Dry Goods | Net Sales | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of total Net sales	17.70%	18.10%	17.70%	17.60%
Pastry
Disaggregation of Revenue [Line Items]
Net sales	$ 53,579	$ 49,219	$ 160,316	$ 144,379
Pastry | Net Sales | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of total Net sales	13.50%	13.60%	13.80%	13.70%
Cheese and Charcuterie
Disaggregation of Revenue [Line Items]
Net sales	$ 40,500	$ 39,481	$ 117,073	$ 111,497
Cheese and Charcuterie | Net Sales | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of total Net sales	10.20%	10.90%	10.00%	10.60%
Dairy and Eggs
Disaggregation of Revenue [Line Items]
Net sales	$ 27,480	$ 27,511	$ 81,765	$ 77,778
Dairy and Eggs | Net Sales | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of total Net sales	6.90%	7.60%	7.00%	7.40%
Oils and Vinegars
Disaggregation of Revenue [Line Items]
Net sales	$ 20,487	$ 19,808	$ 60,117	$ 56,325
Oils and Vinegars | Net Sales | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of total Net sales	5.20%	5.50%	5.20%	5.40%
Kitchen Supplies
Disaggregation of Revenue [Line Items]
Net sales	$ 7,802	$ 7,403	$ 22,377	$ 20,656
Kitchen Supplies | Net Sales | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of total Net sales	2.00%	2.00%	1.90%	2.00%

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