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Note C - Investment Securities - Summary of Securities (Details) - USD ($) $ in Thousands | Sep. 28, 2019 | Sep. 29, 2018
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Held-to-maturity securities, amortized cost | $ 130,451 | $ 139,813
Held-to-maturity securities, gross unrealized gains | 1,210 | 28
Held-to-maturity securities, gross unrealized losses | 36 | 1,527
Held-to-maturity securities, fair market value | 131,625 | 138,314
Available-for-sale securities, amortized cost | 20,147 | 24,658
Available-for-sale securities, gross unrealized gains | 266 | 380
Available-for-sale securities, gross unrealized losses | 510 | 295
Available-for-sale securities, fair market value | 19,903 | 24,743
Corporate Bond Securities [Member] |  |
Held-to-maturity securities, amortized cost | 127,571 | 136,933
Held-to-maturity securities, gross unrealized gains | 1,204 | 28
Held-to-maturity securities, gross unrealized losses | 36 | 1,520
Held-to-maturity securities, fair market value | 128,739 | 135,441
Mutual Funds [Member] |  |
Available-for-sale securities, amortized cost | 5,549 | 8,978
Available-for-sale securities, gross unrealized gains | 0 | 0
Available-for-sale securities, gross unrealized losses | 495 | 295
Available-for-sale securities, fair market value | 5,054 | 8,683
Certificates of Deposit [Member] |  |
Held-to-maturity securities, amortized cost | 2,880 | 2,880
Held-to-maturity securities, gross unrealized gains | 6 | 0
Held-to-maturity securities, gross unrealized losses | 0 | 7
Held-to-maturity securities, fair market value | 2,886 | 2,873
Preferred Stock [Member] |  |
Available-for-sale securities, amortized cost | 14,598 | 15,680
Available-for-sale securities, gross unrealized gains | 266 | 380
Available-for-sale securities, gross unrealized losses | 15 | 0
Available-for-sale securities, fair market value | $ 14,849 | $ 16,060

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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + Details
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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References No definition available. + Details
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- Definition 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. + References No definition available. + Details
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- Definition Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563 + Details
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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27232-111563 + Details
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