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Note C - Investment Securities (Tables) | 12 Months Ended
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Sep. 30, 2017
Notes Tables |
Unrealized Gain (Loss) on Investments [Table Text Block] |
|  |  |  |  |  | Gross |  |  | Gross |  |  | Fair |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Market |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
|  | (in thousands) |  |  |  |  |
Corporate Bonds |  | $ | 114,101 |  |  | $ | 424 |  |  | $ | 155 |  |  | $ | 114,370 |
Certificates of Deposit |  |  | 5,920 |  |  |  | 18 |  |  |  | 1 |  |  |  | 5,937 |
Total marketable securities held to maturity |  | $ | 120,021 |  |  | $ | 442 |  |  | $ | 156 |  |  | $ | 120,307 |
|  |  |  |  |  | Gross |  |  | Gross |  |  | Fair |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Market |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
|  | (in thousands) |
Mutual Funds |  | $ | 13,003 |  |  | $ | 77 |  |  | $ | 240 |  |  | $ | 12,840 |
Preferred Stock |  |  | 16,791 |  |  |  | 711 |  |  |  | 82 |  |  |  | 17,420 |
Total marketable securities available for sale |  | $ | 29,794 |  |  | $ | 788 |  |  | $ | 322 |  |  | $ | 30,260 |
|  |  |  |  |  | Gross |  |  | Gross |  |  | Fair |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Market |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
|  | (in thousands) |  |  |  |  |
Corporate Bonds |  | $ | 103,311 |  |  | $ | 734 |  |  | $ | 138 |  |  | $ | 103,907 |
Certificates of Deposit |  |  | 960 |  |  |  | 11 |  |  |  | - |  |  |  | 971 |
Total marketable securities held to maturity |  | $ | 104,271 |  |  | $ | 745 |  |  | $ | 138 |  |  | $ | 104,878 |
|  |  |  |  |  | Gross |  |  | Gross |  |  | Fair |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Market |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
|  | (in thousands) |
Mutual Funds |  | $ | 13,003 |  |  | $ | - |  |  | $ | 520 |  |  | $ | 12,483 |
Preferred Stock |  |  | 16,791 |  |  |  | 273 |  |  |  | 82 |  |  |  | 16,982 |
Total marketable securities available for sale |  | $ | 29,794 |  |  | $ | 273 |  |  | $ | 602 |  |  | $ | 29,465 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | September 30, 2017 |  |  | September 24, 2016 |
|  |  |  |  |  | Fair |  |  |  |  |  |  | Fair |
|  | Amortized |  |  | Market |  |  | Amortized |  |  | Market |
|  | Cost |  |  | Value |  |  | Cost |  |  | Value |
|  | (in thousands) |
Due in one year or less |  | $ | 59,113 |  |  | $ | 59,194 |  |  | $ | 13,539 |  |  | $ | 13,552 |
Due after one year through five years |  |  | 60,908 |  |  |  | 61,113 |  |  |  | 90,732 |  |  |  | 91,326 |
Due after five years through ten years |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Total held to maturity securities |  | $ | 120,021 |  |  | $ | 120,307 |  |  | $ | 104,271 |  |  | $ | 104,878 |
Less current portion |  |  | 59,113 |  |  |  | 59,194 |  |  |  | 13,539 |  |  |  | 13,552 |
Long term held to maturity securities |  | $ | 60,908 |  |  | $ | 61,113 |  |  | $ | 90,732 |  |  | $ | 91,326 |

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