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Consolidated Statements Of Changes In Stockholders' Equity (USD $)	Class A Common Stock [Member] Common Stock [Member]	Class A Common Stock [Member] Retained Earnings [Member]	Class A Common Stock [Member]	Class B Common Stock [Member] Common Stock [Member]	Class B Common Stock [Member] Retained Earnings [Member]	Class B Common Stock [Member]	Paid-In Capital In Excess Of Par Value [Member]	Retained Earnings [Member]	Total
Balance at Sep. 24, 2011	$ 646,977us-gaap_StockholdersEquity / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			$ 574,486us-gaap_StockholdersEquity / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			$ 116,844,842us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	$ 313,879,289us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	$ 431,945,594us-gaap_StockholdersEquity
Balance (in shares) at Sep. 24, 2011	12,939,533us-gaap_SharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			11,489,726us-gaap_SharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Net income								43,444,343us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	43,444,343us-gaap_NetIncomeLoss
Cash dividends		(8,537,270)us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	(8,537,270)us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember		(6,822,131)us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	(6,822,131)us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Common stock conversions	1,479us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			(1,479)us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Common stock conversions (in shares)	29,575us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			(29,575)us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Stock repurchases, at cost	(774)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			(7,700)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			(2,608,593)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember		(2,617,067)us-gaap_StockRepurchasedDuringPeriodValue
Stock repurchases, at cost (in shares)	(15,473)us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			(154,010)us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Balance at Sep. 29, 2012	647,682us-gaap_StockholdersEquity / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			565,307us-gaap_StockholdersEquity / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			114,236,249us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	341,964,231us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	457,413,469us-gaap_StockholdersEquity
Balance (in shares) at Sep. 29, 2012	12,953,635us-gaap_SharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			11,306,141us-gaap_SharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Net income								20,795,890us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	20,795,890us-gaap_NetIncomeLoss
Cash dividends		(17,141,839)us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	(17,141,839)us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember		(13,303,245)us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	(13,303,245)us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Common stock conversions	24,217us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			(24,217)us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Common stock conversions (in shares)	484,340us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			(484,340)us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Stock repurchases, at cost				(75,000)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			(37,050,000)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember		(37,125,000)us-gaap_StockRepurchasedDuringPeriodValue
Stock repurchases, at cost (in shares)				(1,500,000)us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Balance at Sep. 28, 2013	671,899us-gaap_StockholdersEquity / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			466,090us-gaap_StockholdersEquity / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			77,186,249us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	332,315,037us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	410,639,275us-gaap_StockholdersEquity
Balance (in shares) at Sep. 28, 2013	13,437,975us-gaap_SharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			9,321,801us-gaap_SharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Net income								51,426,454us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	51,426,454us-gaap_NetIncomeLoss
Cash dividends		(8,894,632)us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	(8,894,632)us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember		(5,568,930)us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	(5,568,930)us-gaap_DividendsCommonStockCash / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Common stock conversions	5,118us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			(5,118)us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Common stock conversions (in shares)	102,358us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			(102,358)us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Stock repurchases, at cost				(125,000)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			(64,875,000)us-gaap_StockRepurchasedDuringPeriodValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember		(65,000,000)us-gaap_StockRepurchasedDuringPeriodValue
Stock repurchases, at cost (in shares)				(2,500,000)us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember		(2,500,000)us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Balance at Sep. 27, 2014	$ 677,017us-gaap_StockholdersEquity / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			$ 335,972us-gaap_StockholdersEquity / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			$ 12,311,249us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember	$ 369,277,929us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember	$ 382,602,167us-gaap_StockholdersEquity
Balance (in shares) at Sep. 27, 2014	13,540,333us-gaap_SharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember			6,719,443us-gaap_SharesOutstanding / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember

X

- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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X

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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X

- Definition

Number of shares issued which are neither cancelled nor held in the treasury.

+ References

No definition available.

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X

- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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X

- Definition

Number of shares issued during the period as a result of the conversion of convertible securities.

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The gross value of stock issued during the period upon the conversion of convertible securities.

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