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Note 4 - Marketable Securities (Tables) | 3 Months Ended
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Mar. 31, 2014
Disclosure Text Block Supplement [Abstract] |
Marketable Securities [Table Text Block] |
|  | March 31, 2014
|  | Adjusted Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value
Equity instruments |  | $ | 58,635 |  |  | $ | 11,073 |  |  | $ | (2,745 | ) |  | $ | 66,963 |  |
Preferred stock |  |  | 18,756 |  |  |  | 1,613 |  |  |  | (25 | ) |  |  | 20,344 |  |
Trust preferred securities |  |  | 20,240 |  |  |  | 803 |  |  |  | (12 | ) |  |  | 21,031 |  |
Exchange traded debt instruments |  |  | 1,809 |  |  |  | 123 |  |  |  | - |  |  |  | 1,932 |  |
Total |  | $ | 99,440 |  |  | $ | 13,612 |  |  | $ | (2,782 | ) |  | $ | 110,270 |  |
|  | December 31, 2013 |
|  | Adjusted Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value |
Equity instruments |  | $ | 51,711 |  |  | $ | 11,597 |  |  | $ | (278 | ) |  | $ | 63,030 |
Preferred stock |  |  | 18,519 |  |  |  | 893 |  |  |  | (299 | ) |  |  | 19,113 |
Trust preferred securities |  |  | 19,726 |  |  |  | 386 |  |  |  | (235 | ) |  |  | 19,877 |
Exchange traded debt instruments |  |  | 2,243 |  |  |  | 34 |  |  |  | (26 | ) |  |  | 2,251 |
Total |  | $ | 92,199 |  |  | $ | 12,910 |  |  | $ | (838 | ) |  | $ | 104,271 |

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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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