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Long-Term Debt (Narrative) (Details) (USD $) In Thousands, unless otherwise specified |  |  | 12 Months Ended |  |  | 12 Months Ended |  |  | 12 Months Ended |  | 12 Months Ended
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Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2010 Revolving Line of Credit and Term Note [Member] | Sep. 30, 2012 Revolving Line of Credit and Term Note [Member] | Aug. 01, 2012 Revolving Line of Credit and Term Note [Member] | Sep. 30, 2012 Revolving Line of Credit [Member] | Sep. 30, 2011 Revolving Line of Credit [Member] | Sep. 30, 2010 Revolving Line of Credit [Member] | Sep. 30, 2012 Revolving Line of Credit [Member] Minimum [Member] | Sep. 30, 2012 Revolving Line of Credit [Member] Maximum [Member] | Sep. 30, 2012 Revolving Line of Credit [Member] Property [Member] acre | Sep. 30, 2012 Term Note [Member] | Sep. 30, 2011 Term Note [Member] | Sep. 30, 2012 Term Note [Member] Property [Member] acre | Sep. 30, 2012 Term Note [Member] Producing Citrus Groves [Member] acre | Sep. 30, 2012 Mortgage Note Payable [Member] acre | Sep. 30, 2011 Mortgage Note Payable [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal balance outstanding | $ 39,900 | $ 57,158 |  |  |  |  | $ 13,979 |  |  |  |  | $ 38,000 | $ 40,000 |  |  | $ 1,900 | $ 3,167
Acres collateralized |  |  |  |  |  |  |  |  |  |  | 43,991 |  |  | 12,280 | 8,600 | 7,680 |
Maximum borrowing capacity |  |  |  | 98,000 |  | 60,000 |  |  |  |  |  |  |  |  |  |  |
LIBOR spread |  |  |  |  |  | 2.25% |  | 2.50% | 2.25% | 2.75% |  | 2.50% |  |  |  |  |
Periodic principal payment |  |  |  |  |  |  |  |  |  |  |  | 500 |  |  |  | 106 |
Date of first required payment |  |  |  |  |  | Oct. 01, 2010 |  |  |  |  |  | Oct. 01, 2011 |  |  |  |  |
Scheduled maturity date |  |  |  |  |  | Oct. 01, 2020 | Oct. 01, 2020 |  |  |  |  | Oct. 01, 2020 | Oct. 01, 2020 |  |  | Mar. 01, 2014 | Mar. 01, 2014
Term of credit facility |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |
Minimum number of days notice required for rate change |  |  |  |  |  | 30 days |  |  |  |  |  |  |  |  |  |  |
Capitalized loan origination fees |  |  | 1,202 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum current ratio |  |  |  | 1.5 |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum debt ratio |  |  |  | 0.6 |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum tangible net worth |  |  |  | 80,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum debt coverage ratio |  |  |  | 1.15 |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum balance in concentration account |  |  |  | $ 20,000 | $ 250 |  |  |  |  |  |  |  |  |  |  |  |

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