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Segment Information (Operations By Lines Of Business) (Details) (USD $)	3 Months Ended		6 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 29, 2014	Mar. 30, 2013	Sep. 28, 2013
Segment Reporting Information By Segment [Line Items]
Total revenues from unaffiliated customers	$ 947,761,000	$ 920,694,000	$ 1,892,885,000	$ 1,855,672,000
Total income from operations	27,804,626	27,721,800	54,004,984	61,202,806
Total assets	1,660,451,319		1,660,451,319		1,669,327,737
Elimination Of Intercompany Receivable [Member]
Segment Reporting Information By Segment [Line Items]
Total assets	(2,245,000)		(2,245,000)		(2,392,000)
Grocery Sales [Member]
Segment Reporting Information By Segment [Line Items]
Total revenues from unaffiliated customers	908,448,000	886,374,000	1,818,534,000	1,786,170,000
Total income from operations	24,284,000	24,415,000	48,449,000	55,256,000
Total assets	1,516,206,000		1,516,206,000		1,528,483,000
Other Segment [Member]
Segment Reporting Information By Segment [Line Items]
Total revenues from unaffiliated customers	39,313,000	34,320,000	74,351,000	69,502,000
Total income from operations	3,521,000	3,307,000	5,556,000	5,947,000
Total assets	$ 146,490,000		$ 146,490,000		$ 143,237,000