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Long-Term Debt (Narrative) (Details) (USD $) In Thousands, unless otherwise specified |  |  |  | 1 Months Ended | 6 Months Ended | 12 Months Ended |  | 6 Months Ended | 12 Months Ended |  | 0 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2013 | Sep. 30, 2012 | Mar. 31, 2013 Revolving Line of Credit and Term Note [Member] | Feb. 28, 2013 Revolving Line of Credit [Member] | Mar. 31, 2013 Revolving Line of Credit [Member] | Sep. 30, 2012 Revolving Line of Credit [Member] | Mar. 31, 2013 Revolving Line of Credit [Member] Minimum [Member] | Mar. 31, 2013 Revolving Line of Credit [Member] Maximum [Member] | Mar. 31, 2013 Revolving Line of Credit [Member] Property [Member] acre | Mar. 31, 2013 Term Loan [Member] | Sep. 30, 2012 Term Loan [Member] | Mar. 31, 2013 Term Loan [Member] Property [Member] acre | Mar. 31, 2013 Term Loan [Member] Producing Citrus Groves [Member] acre | Oct. 10, 2012 Mortgage Note Payable [Member] | Sep. 30, 2012 Mortgage Note Payable [Member] acre | Mar. 31, 2013 Mortgage Note Payable [Member]
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal balance outstanding | $ 37,000 | $ 39,900 | $ 97,000 |  |  |  |  |  |  | $ 37,000 | $ 38,000 |  |  |  | $ 1,900 |
Acres collateralized |  |  |  |  |  |  |  |  | 43,991 |  |  | 12,280 | 8,600 |  | 7,680 |
Amount of credit facility |  |  |  |  | 60,000 |  |  |  |  |  |  |  |  |  |  |
Annual commitment fee |  |  |  |  | 0.15% |  |  |  |  |  |  |  |  |  |  |
Amount of commitment fees |  |  |  | 87 |  |  |  |  |  |  |  |  |  |  |  |
Commitment fee payable |  |  |  |  | 15 |  |  |  |  |  |  |  |  |  |  |
LIBOR spread |  |  |  |  | 2.25% |  | 2.25% | 2.50% |  | 2.50% |  |  |  |  |  |
Periodic principal payment |  |  |  |  |  |  |  |  |  | 500 |  |  |  |  |  |
Scheduled maturity date |  |  |  |  | Oct. 01, 2020 | Oct. 01, 2020 |  |  |  | Oct. 01, 2020 | Oct. 01, 2020 |  |  |  | Mar. 01, 2014 |
Minimum number of days notice required for rate change |  |  |  |  | 30 days |  |  |  |  |  |  |  |  |  |  |
Amount of debt extinguished |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,794 |  |
Prepayment penalty |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 66 |  |

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