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Basis of Presentation and Significant Accounting Policies (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2010
Restricted cash |  |  |
Restricted cash | $ 2,500 |  |
Stock-based Compensation |  |  |
Stock-based compensation expense | $ 485 | $ 434 | $ 436
Citrus Trees [Member] |  |  |
Property, Buildings and Equipment |  |  |
Estimated useful life | 25 years |  |
Cost capitalization period | 4 years |  |
Sugarcane Plantings [Member] |  |  |
Property, Buildings and Equipment |  |  |
Estimated useful life | 3 years |  |
Cost capitalization period | 1 year |  |
Total crop yield | 3 |  |
Annual crop yield | 1 |  |
Restricted Stock [Member] |  |  |
Stock-based Compensation |  |  |
Number of shares authorized | 350,000 |  |
Shares issued to Directors | 22,587 |  |
Weighted average fair value of shares issued to Directors | $ 26.06 |  |
Shares eligible for grant | 279,566 |  |
Nonvested restricted shares | 170,063 |  |
Minimum [Member] |  |  |
Real Estate |  |  |
Down payment as a percent of the sales price | 20.00% |  |
Minimum [Member] | Restricted Stock [Member] |  |  |
Stock-based Compensation |  |  |
Vesting period | 1 year |  |
Maximum [Member] |  |  |
Real Estate |  |  |
Down payment as a percent of the sales price | 25.00% |  |
Maximum [Member] | Restricted Stock [Member] |  |  |
Stock-based Compensation |  |  |
Vesting period | 6 years |  |
Customer Concentration Risk [Member] | Florida Orange Marketers, Inc. [Member] |  |  |
Major Customers |  |  |
Percentage of revenue | 18.00% | 18.00% | 18.00%
Customer Concentration Risk [Member] | Louis Dreyfus [Member] |  |  |
Major Customers |  |  |
Percentage of revenue | 23.00% | 12.00% | 5.00%
Sales Revenue, Product Line [Member] | Customer Concentration Risk [Member] | United States Sugar Corporation and Southern Gardens [Member] |  |  |
Major Customers |  |  |
Percentage of revenue | 11.00% |  |
Sales Revenue, Product Line [Member] | Product Concentration Risk [Member] |  |  |
Major Customers |  |  |
Concentration risk percentage | 100.00% |  |

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