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Transactions with Vulcan Materials Company (Details Narrative) (USD $) | 12 Months Ended
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Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2010
Capital contributions made | $ 125,000 | $ 114,000 | $ 495,000
Equity in the loss of the joint venture | (8,000) | (39,000) | (2,000)
Brooksville Quarry, LLC |  |  |
Acreage to be developed | 4,300 |  |
FRP land contribution previously leased to Vulcan | 3,443 |  |
Book value of land contribution | 2,548,000 |  |
Royalty revenues | 242,000 | 240,000 |
Allocated depletion expense | 8,000 |  |
FRP additional contribution for land | 3,018,000 |  |
Additional land acquired | 288 |  |
Vulcan land contribution | 553 |  |
Mandatory capital contribution obligation | 2,265,000 |  |
Capital contributions made | 2,234,000 |  |
Equity in the loss of the joint venture | $ (8,000) |  |

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