Segment Information (Operations By Lines Of Business) (Details) - USD ($)	3 Months Ended	9 Months Ended
Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014	Sep. 27, 2014
Segment Reporting Information By Segment [Line Items]
Total revenues from unaffiliated customers	$ 945,974,000	$ 978,262,000	$ 2,825,806,000	$ 2,871,147,000
Total income from operations	31,114,933	33,360,362	102,280,635	87,365,349
Total assets	1,665,679,420		1,665,679,420		$ 1,656,951,564
Elimination of intercompany receivable
Segment Reporting Information By Segment [Line Items]
Total assets	(1,689,000)		(1,689,000)		(2,770,000)
Grocery sales
Segment Reporting Information By Segment [Line Items]
Total revenues from unaffiliated customers	911,698,000	938,386,000	2,717,538,000	2,756,920,000
Total income from operations	27,686,000	30,229,000	92,261,000	78,678,000
Total assets	1,433,644,000		1,433,644,000		1,515,055,000
Other Segment [Member]
Segment Reporting Information By Segment [Line Items]
Total revenues from unaffiliated customers	34,276,000	39,876,000	108,268,000	114,227,000
Total income from operations	3,429,000	$ 3,131,000	10,020,000	$ 8,687,000
Total assets	$ 233,724,000		$ 233,724,000		$ 144,667,000