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Note C - Investment Securities - Summary of Securities (Details) - USD ($) $ in Thousands | Sep. 29, 2018 | Sep. 30, 2017
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Held-to-maturity securities, amortized cost | $ 139,813 | $ 120,021
Held-to-maturity securities, gross unrealized gains | 28 | 442
Held-to-maturity securities, gross unrealized losses | 1,527 | 156
Held-to-maturity securities, fair market value | 138,314 | 120,307
Available-for-sale securities, amortized cost | 24,658 | 29,794
Available-for-sale securities, gross unrealized gains | 380 | 788
Available-for-sale securities, gross unrealized losses | 295 | 322
Available-for-sale securities, fair market value | 24,743 | 30,260
Corporate Bond Securities [Member] |  |
Held-to-maturity securities, amortized cost | 136,933 | 114,101
Held-to-maturity securities, gross unrealized gains | 28 | 424
Held-to-maturity securities, gross unrealized losses | 1,520 | 155
Held-to-maturity securities, fair market value | 135,441 | 114,370
Mutual Funds [Member] |  |
Available-for-sale securities, amortized cost | 8,978 | 13,003
Available-for-sale securities, gross unrealized gains |  | 77
Available-for-sale securities, gross unrealized losses | 295 | 240
Available-for-sale securities, fair market value | 8,683 | 12,840
Certificates of Deposit [Member] |  |
Held-to-maturity securities, amortized cost | 2,880 | 5,920
Held-to-maturity securities, gross unrealized gains |  | 18
Held-to-maturity securities, gross unrealized losses | 7 | 1
Held-to-maturity securities, fair market value | 2,873 | 5,937
Preferred Stock [Member] |  |
Available-for-sale securities, amortized cost | 15,680 | 16,791
Available-for-sale securities, gross unrealized gains | 380 | 711
Available-for-sale securities, gross unrealized losses |  | 82
Available-for-sale securities, fair market value | $ 16,060 | $ 17,420

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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=82897076&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=82897076&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=82897076&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=82897076&loc=d3e27232-111563 + Details
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