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Note C - Marketable Equity Securities (Tables) | 9 Months Ended
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Sep. 30, 2013
Investments, Debt and Equity Securities [Abstract] |
Marketable Securities [Table Text Block] |
|  | September 30, 2013 |  |  | December 31, 2012 |
|  | (in thousands) |
Available-for-sale securities |  |  |  |  |  |  |  |
Fair market value |  | $ | 19,299 |  |  | $ | 17,188 |
Cost |  |  | 10,302 |  |  |  | 10,361 |
Unrealized gain |  | $ | 8,997 |  |  | $ | 6,827 |
Trading securities |  |  |  |  |  |  |  |
Fair market value |  | $ | 149 |  |  | $ | 132 |
Cost |  |  | 158 |  |  |  | 158 |
Unrealized loss |  | $ | (9 | ) |  | $ | (26 | )
Total |  |  |  |  |  |  |  |
Fair market value |  | $ | 19,448 |  |  | $ | 17,320 |
Cost |  |  | 10,460 |  |  |  | 10,519 |
Unrealized gain |  | $ | 8,988 |  |  | $ | 6,801 |
Unrealized Gain (Loss) on Investments [Table Text Block] |
|  | September 30, 2013 |  |  | December 31, 2012 |
|  | (in thousands) |
Available-for-sale securities: |  |  |  |  |  |  |  |
Gross unrealized gains |  | $ | 9,078 |  |  | $ | 6,960 |
Gross unrealized losses |  |  | 81 |  |  |  | 133 |
Total unrealized gains |  | $ | 8,997 |  |  | $ | 6,827 |
Realized Gain (Loss) on Investments [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
|  | (in thousands) |  |  | (in thousands) |
Trading securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recognized loss at beginning of period |  | $ | (6 | ) |  | $ | (13 | ) |  | $ | (26 | ) |  | $ | (16 | )
Recognized loss at end of period |  |  | (9 | ) |  |  | (28 | ) |  |  | (9 | ) |  |  | (28 | )
Net recognized (loss) gain for the period |  | $ | (3 | ) |  | $ | (15 | ) |  | $ | 17 |  |  | $ | (12 | )
Net recognized (loss) gain for the period, net of taxes |  | $ | (2 | ) |  | $ | (9 | ) |  | $ | 10 |  |  | $ | (7 | )
Schedule of Realized Gain (Loss) [Table Text Block] |
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2013 |  |  | 2012 |  |  | 2013 |  |  | 2012 |
|  | (in thousands) |  |  | (in thousands) |
Realized gains |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale proceeds |  | $ | - |  |  | $ | 1,407 |  |  | $ | 13 |  |  | $ | 3,558 |
Cost of securities sold |  |  | - |  |  |  | 450 |  |  |  | 6 |  |  |  | 1,561 |
Realized gains |  | $ | - |  |  | $ | 957 |  |  | $ | 7 |  |  | $ | 1,997 |
Realized gains, net of taxes |  | $ | - |  |  | $ | 569 |  |  | $ | 4 |  |  | $ | 1,194 |
Schedule of Unrealized Loss on Investments [Table Text Block] |
|  | September 30, 2013 |  |  | December 31, 2012 |
|  | (in thousands) |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
Equity securities – Available-for-sale |  | $ | 1,470 |  |  | $ | 83 |  |  | $ | 1,567 |  |  | $ | 133 |
Equity securities – Trading |  |  | 149 |  |  |  | 9 |  |  |  | 129 |  |  |  | 26 |
Totals |  | $ | 1,619 |  |  | $ | 92 |  |  | $ | 1,696 |  |  | $ | 159 |

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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2,12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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