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Long-Term Debt and Lines of Credit - Silver Nip Citrus Debt (Details) |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 28, 2015 USD ($) | Dec. 03, 2014 USD ($) | Sep. 04, 2014 USD ($) a loan | Sep. 30, 2016 USD ($) a loan | Sep. 30, 2015 USD ($) | Sep. 30, 2014 USD ($) | Feb. 15, 2015 USD ($) | Dec. 02, 2014 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate term loans |  |  |  | $ 197,219,000 | $ 205,481,000 |  |  |
Loss on extinguishment of debt |  |  |  | 0 | 1,051,000 | $ 0 |  |
Deferred financing costs |  |  |  | 2,000,000 |  |  |  |
Rabo Agrifinance, Inc. variable rate term loan. The loan was refinanced on December 3, 2014. |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Revolving line of credit |  |  |  |  |  |  |  | $ 60,000,000
Deferred financing costs |  |  |  | 339,000 |  |  |  |
Fixed Interest Rate Term Loans |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate term loans |  | $ 125,000,000 |  | $ 105,312,000 | $ 111,563,000 |  |  |
Fixed interest rate |  | 4.15% |  | 4.15% |  |  |  |
Quarterly principal payments |  | $ 2,281,250 |  |  |  |  |  |
Prepayment amount of the fixed term loan (up to) |  | $ 8,750,000 |  | $ 0 |  |  |  |
Silver Nip Citrus |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Number of fixed rate term loans | loan |  |  | 2 |  |  |  |  |
Area of land acquired (in acres) | a |  |  |  | 7,400 |  |  |  |
Minimum current ratio |  |  |  | 1.5 |  |  |  |
Silver Nip Citrus | Rabo Agrifinance, Inc. variable rate term loan. The loan was refinanced on December 3, 2014. |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Revolving line of credit | $ 6,000,000 |  |  |  |  |  |  |
Loss on extinguishment of debt | $ 87,000 |  |  |  |  |  |  |
Silver Nip Citrus | Citrus Grove |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Area of land acquired (in acres) | a |  |  | 1,500 |  |  |  |  |
Silver Nip Citrus | Fixed Interest Rate Term Loans |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Number of fixed rate term loans | loan |  |  |  | 2 |  |  |  |
Interest rate term loans |  |  |  | $ 27,550,000 |  |  |  |
Fixed interest rate |  |  |  | 5.35% |  |  |  |
Quarterly principal payments |  |  |  | $ 290,000 |  |  |  |
Prepayment amount of the fixed term loan (up to) |  |  |  | 5,000,000 |  |  |  |
Amount of prepayment |  |  |  |  |  |  | $ 750,000 |
Silver Nip Citrus | Fixed Interest Rate Term Loans | Prudential |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate term loans |  |  | $ 5,500,000 |  |  |  |  |
Quarterly principal payments |  |  | $ 55,000 |  |  |  |  |
Silver Nip Citrus | Fixed Rate Term Loan at 3.85% |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 3.85% |  |  |  |  |
Silver Nip Citrus | Fixed Rate Term Loan at 3.45% |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 3.45% |  |  |  |  |
Silver Nip Citrus | Silver Nip Citrus Debt |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Deferred financing costs |  |  |  | $ 351,000 |  |  |  |

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