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Note 10 - Investments in Marketable Securities (Tables) | 9 Months Ended
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Jun. 30, 2014
Notes Tables |
Schedule of Available-for-sale Securities Reconciliation [Table Text Block] |
|  | June 30, 2014 |  |  | September 30, 2013 |
|  | (Unaudited) |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Aggregate fair value |  |  | Amortized/ Adjusted cost basis |  |  | Pretax unrealized gains |  |  | Aggregate fair value |  |  | Amortized/ A djusted cost basis |  |  | Pretax unrealized gains |
Marketable securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stocks |  | $ | 158,630,000 |  |  | $ | 43,042,000 |  |  | $ | 115,588,000 |  |  | $ | 129,699,000 |  |  | $ | 43,042,000 |  |  | $ | 86,657,000 |
Bonds |  |  | 8,193,000 |  |  |  | 4,936,000 |  |  |  | 3,257,000 |  |  |  | 7,295,000 |  |  |  | 4,934,000 |  |  |  | 2,361,000 |
Total |  | $ | 166,823,000 |  |  | $ | 47,978,000 |  |  | $ | 118,845,000 |  |  | $ | 136,994,000 |  |  | $ | 47,976,000 |  |  | $ | 89,018,000 |

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