Condensed Consolidated Statements Of Income (USD $)	3 Months Ended
Dec. 27, 2014	Dec. 28, 2013
Net sales	$ 964,496,835us-gaap_SalesRevenueGoodsNet	$ 945,124,870us-gaap_SalesRevenueGoodsNet
Cost of goods sold	740,104,278us-gaap_CostOfGoodsSold	741,619,203us-gaap_CostOfGoodsSold
Gross profit	224,392,557us-gaap_GrossProfit	203,505,667us-gaap_GrossProfit
Operating and administrative expenses	186,978,851us-gaap_OperatingExpenses	177,430,181us-gaap_OperatingExpenses
Gain from sale or disposal of assets	117,781us-gaap_GainLossOnDispositionOfAssets	124,873us-gaap_GainLossOnDispositionOfAssets
Income from operations	37,531,487us-gaap_OperatingIncomeLoss	26,200,359us-gaap_OperatingIncomeLoss
Other income, net	562,760us-gaap_OtherNonoperatingIncomeExpense	840,001us-gaap_OtherNonoperatingIncomeExpense
Interest expense	12,022,909us-gaap_InterestExpense	11,782,231us-gaap_InterestExpense
Income before income taxes	26,071,338	15,258,129
Income tax expense	11,033,000us-gaap_IncomeTaxExpenseBenefit	5,725,000us-gaap_IncomeTaxExpenseBenefit
Net income	$ 15,038,338us-gaap_NetIncomeLoss	$ 9,533,129us-gaap_NetIncomeLoss
Class A Common Stock [Member]
Per share amounts:
Basic earnings per common share	$ 0.77	$ 0.44
Diluted earnings per common share	$ 0.74	$ 0.42
Cash dividends per common share:
Common Stock	$ 0.165	$ 0.165
Class B Common Stock [Member]
Per share amounts:
Basic earnings per common share	$ 0.70	$ 0.40
Diluted earnings per common share	$ 0.70	$ 0.40
Cash dividends per common share:
Common Stock	$ 0.150	$ 0.150

Aggregate dividends paid during the period for each share of common stock outstanding.

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