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Segment Information (Operations By Lines Of Business) (Details) (USD $)
 3 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Sep. 28, 2013
Segment Reporting Information By Segment [Line Items]      
Total revenues from unaffiliated customers $ 945,125,000 $ 934,978,000  
Total income from operations 26,200,359 33,481,006  
Total assets 1,653,722,606 1,669,328,000 1,669,327,737
Elimination Of Intercompany Receivable [Member]
      
Segment Reporting Information By Segment [Line Items]      
Total assets (2,510,000) (2,472,000)  
Grocery Sales [Member]
      
Segment Reporting Information By Segment [Line Items]      
Total revenues from unaffiliated customers 910,087,000 899,795,000  
Total income from operations 24,165,000 30,841,000  
Total assets 1,510,506,000 1,513,891,000  
Shopping Center Rentals [Member]
      
Segment Reporting Information By Segment [Line Items]      
Total income from operations 2,035,000 2,640,000  
Total assets 145,727,000 157,909,000  
Fluid Dairy [Member]
      
Segment Reporting Information By Segment [Line Items]      
Total revenues from unaffiliated customers $ 35,038,000 $ 35,183,000