Note 11 (Detail) - Summary of Securities (USD $) In Thousands, unless otherwise specified	Mar. 30, 2013	Sep. 29, 2012
Amortized Cost - Held To Maturity	$ 6,077	$ 26,212
Gross Unrealized Gains - Held To Maturity	14	126
Gross Unrealized Losses - Held To Maturity	0
Fair Market Value - Held To Maturity	6,091	26,338
Amortized Cost - Available For Sale	80,000
Gross Unrealized Gains - Available For Sale	519
Gross Unrealized Losses - Available For Sale	227
Fair Market Value - Available For Sale	80,292
Guaranteed Investment Contract [Member]
Amortized Cost - Held To Maturity	3,341
Fair Market Value - Held To Maturity	3,341
US Government Corporations and Agencies Securities [Member]
Amortized Cost - Held To Maturity	2,000	24,998
Gross Unrealized Gains - Held To Maturity	14	126
Gross Unrealized Losses - Held To Maturity	0
Fair Market Value - Held To Maturity	2,014	25,124
Certificates of Deposit [Member]
Amortized Cost - Held To Maturity	736	1,214
Fair Market Value - Held To Maturity	736	1,214
Mutual Funds [Member]
Amortized Cost - Available For Sale	80,000
Gross Unrealized Gains - Available For Sale	519
Gross Unrealized Losses - Available For Sale	227
Fair Market Value - Available For Sale	$ 80,292

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

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- Definition

This item represents the aggregate fair value of investments in debt securities as of the balance sheet date and which are categorized as held-to-maturity.

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- Definition

As of the balance sheet date, the excess of fair value over carrying value (amortized cost) of a debt security categorized as held-to-maturity, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding gain.

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- Definition

As of the balance sheet date, the excess of carrying value (amortized cost) over fair value of a debt security categorized as held-to-maturity, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding loss.

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