Revenue Recognition - Revenue by Product (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2021	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020
Disaggregation of Revenue [Line Items]
Total net sales	$ 1,047,349	$ 1,098,704	$ 2,053,689	$ 2,084,524
Grocery [Member]
Disaggregation of Revenue [Line Items]
Total net sales	900,009	987,502	1,774,083	1,851,249
Pharmacy [Member]
Disaggregation of Revenue [Line Items]
Total net sales	101,471	85,808	197,068	175,142
Fuel [Member]
Disaggregation of Revenue [Line Items]
Total net sales	43,826	23,129	78,197	53,096
Manufacturing [Member]
Disaggregation of Revenue [Line Items]
Total net sales	$ 2,043	$ 2,265	$ 4,341	$ 5,037