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Long-Term Debt (Narrative) (Details) (USD $) |  |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2010 Revolving Line of Credit and Term Note [Member] | Sep. 30, 2014 Revolving Line of Credit and Term Note [Member] | Sep. 30, 2014 Revolving Line of Credit [Member] | Sep. 30, 2013 Revolving Line of Credit [Member] | Sep. 30, 2014 Revolving Line of Credit [Member] Minimum [Member] | Sep. 30, 2014 Revolving Line of Credit [Member] Maximum [Member] | Sep. 30, 2014 Revolving Line of Credit [Member] Property [Member] acre | Sep. 30, 2014 Term Loan [Member] | Sep. 30, 2013 Term Loan [Member] | Sep. 30, 2014 Term Loan [Member] Maximum [Member] | Sep. 30, 2014 Term Loan [Member] Property [Member] acre | Sep. 30, 2014 Term Loan [Member] Producing Citrus Groves [Member] acre
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal balance outstanding | $ 34,000,000 | $ 36,000,000 |  |  |  |  |  |  |  | $ 34,000,000 | $ 36,000,000 |  |  |
Acres collateralized |  |  |  |  |  |  |  |  | 43,991 |  |  |  | 12,280 | 8,600
Amount of credit facility |  |  |  | 94,000,000 | 60,000,000 |  |  |  |  |  |  |  |  |
Annual commitment fee |  |  |  |  | 0.20% |  |  |  |  |  |  |  |  |
LIBOR spread |  |  |  |  | 1.95% |  | 1.95% | 2.95% |  | 2.25% |  | 5.00% |  |
Periodic principal payment |  |  |  |  |  |  |  |  |  | 500,000 |  |  |  |
Scheduled maturity date |  |  |  |  | Oct. 01, 2020 | Oct. 01, 2020 |  |  |  | Oct. 01, 2020 | Oct. 01, 2020 |  |  |
Minimum number of days notice required for rate change |  |  |  |  | 30 days |  |  |  |  | 30 days |  |  |  |
Capitalized loan origination fees |  |  | 1,202,000 |  |  |  |  |  |  |  |  |  |  |
Minimum current ratio |  |  |  | 1.50 |  |  |  |  |  |  |  |  |  |
Maximum debt ratio |  |  |  | 0.60 |  |  |  |  |  |  |  |  |  |
Minimum tangible net worth |  |  |  | $ 80,000,000 |  |  |  |  |  |  |  |  |  |
Minimum debt coverage ratio |  |  |  | 1.15 |  |  |  |  |  |  |  |  |  |
Debt Instrument, Term |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |

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