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Note C - Investment Securities (Details) - Summary of Held to Maturity Securities - USD ($) $ in Thousands	12 Months Ended
	Sep. 26, 2015	Sep. 27, 2014
Note C - Investment Securities (Details) - Summary of Held to Maturity Securities [Line Items]
Held to Maturity - Amortized Cost	$ 66,660	$ 2,000
Held to Maturity - Gross Unrealized Gains	15
Held to Maturity - Gross Unrealized Losses	663	13
Held to Maturity - Fair Market Value	66,012	1,987
Available for Sale - Amortized Cost	40,514	129,473
Available for Sale - Gross Unrealized Gains	114	760
Available for Sale - Gross Unrealized Losses	990	2,116
Available for Sale - Fair Market Value	39,638	128,117
Corporate Bond Securities [Member]
Note C - Investment Securities (Details) - Summary of Held to Maturity Securities [Line Items]
Held to Maturity - Amortized Cost	66,660
Held to Maturity - Gross Unrealized Gains	15
Held to Maturity - Gross Unrealized Losses	663
Held to Maturity - Fair Market Value	66,012
Mutual Funds [Member]
Note C - Investment Securities (Details) - Summary of Held to Maturity Securities [Line Items]
Available for Sale - Amortized Cost	20,041	129,473
Available for Sale - Gross Unrealized Gains		760
Available for Sale - Gross Unrealized Losses	827	2,116
Available for Sale - Fair Market Value	19,214	128,117
Preferred Stock [Member]
Note C - Investment Securities (Details) - Summary of Held to Maturity Securities [Line Items]
Available for Sale - Amortized Cost	20,473
Available for Sale - Gross Unrealized Gains	114
Available for Sale - Gross Unrealized Losses	163
Available for Sale - Fair Market Value	$ 20,424
US Government Corporations and Agencies Securities [Member]
Note C - Investment Securities (Details) - Summary of Held to Maturity Securities [Line Items]
Held to Maturity - Amortized Cost		2,000
Held to Maturity - Gross Unrealized Losses		13
Held to Maturity - Fair Market Value		$ 1,987

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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