Note 12 (Detail) - Summary of Held to Maturity Securities (USD $) In Thousands, unless otherwise specified	Jun. 23, 2012	Sep. 24, 2011
Amortized Cost	$ 54,933	$ 67,506
Gross Unrealized Gains	117	71
Gross Unrealized Losses	38	62
Fair Market Value	55,012	67,515
US Government Agencies Debt Securities [Member]
Amortized Cost	53,479	42,000
Gross Unrealized Gains	117	52
Gross Unrealized Losses	38	62
Fair Market Value	53,558	41,990
Certificates of Deposit [Member]
Amortized Cost	1,454	17,491
Gross Unrealized Gains		1
Fair Market Value	1,454	17,492
FDIC Backed Corporate Debt [Member]
Amortized Cost		8,015
Gross Unrealized Gains		18
Fair Market Value		$ 8,033

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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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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