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Note C - Investment Securities - Summary of Held to Maturity Securities (Details) - USD ($)	Sep. 24, 2016	Sep. 26, 2015	Sep. 27, 2014
Corporate Bond Securities [Member]
Amortized Cost	$ 103,311,000	$ 66,660,000
Gross Unrealized Gains	734,000	15,000
Gross Unrealized Losses	138,000	663,000
Fair Market Value	103,907,000	66,012,000
Mutual Fund [Member]
Amortized Cost	13,003,000	20,041,000
Gross Unrealized Gains
Gross Unrealized Losses	520,000	827,000
Available-for-sale Securities	12,483,000	19,214,000	$ 128,000,000
Certificates of Deposit [Member]
Amortized Cost	960,000
Gross Unrealized Gains	11,000
Gross Unrealized Losses
Fair Market Value	971,000
Preferred Stock [Member]
Amortized Cost	16,791,000	20,473,000
Gross Unrealized Gains	273,000	114,000
Gross Unrealized Losses	82,000	163,000
Available-for-sale Securities	16,982,000	20,424,000
Amortized Cost	104,271,000	66,660,000
Gross Unrealized Gains	745,000	15,000
Gross Unrealized Losses	138,000	663,000
Fair Market Value	104,878,000	66,012,000
Amortized Cost	29,794,000	40,514,000
Gross Unrealized Gains	273,000	114,000
Gross Unrealized Losses	602,000	990,000
Available-for-sale Securities	$ 29,465,000	$ 39,638,000

X

- Definition

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

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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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Fair value of investments in debt securities classified as held-to-maturity.

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