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Long-Term Debt and Lines of Credit - Silver Nip Citrus Debt (Details) |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 01, 2016 USD ($) | Apr. 28, 2015 USD ($) | Sep. 04, 2014 USD ($) a loan | Sep. 30, 2017 USD ($) loan | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Feb. 15, 2015 USD ($) | Sep. 30, 2014 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate term loans |  |  |  | $ 186,476,000 | $ 197,219,000 |  |  |
Loss on extinguishment of debt |  |  |  | 0 | 0 | $ 1,051,000 |  |
Deferred Financing Costs, Net |  |  |  | 1,767,000 | 1,980,000 |  |  |
Revolving Line Of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Deferred Financing Costs, Net |  |  |  | 1,656,000 | 1,965,000,000 |  |  | $ 339,000
Pru Loans A & B |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate term loans |  |  |  | 23,030,000 | 24,190,000 |  |  |
Pru Loan E |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate term loans |  |  |  | 4,895,000 | 5,115,000 |  |  |
Pru Loan F |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate term loans |  |  |  | $ 4,895,000 | $ 5,115,000 |  |  |
Silver Nip Citrus |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Minimum current ratio (at least) |  |  |  | 1.5 |  |  |  |
Silver Nip Citrus | Prudential |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Number of fixed rate term loans | loan |  |  | 2 |  |  |  |  |
Interest rate term loans |  |  | $ 5,500,000 |  |  |  |  |
Quarterly principal payments |  |  | $ 55,000 |  |  |  |  |
Silver Nip Citrus | Prudential | Revolving Line Of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Revolving line of credit |  | $ 6,000,000 |  |  |  |  |  |
Loss on extinguishment of debt |  | $ 87,000 |  |  |  |  |  |
Silver Nip Citrus | Citrus Grove | Prudential |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Area of land acquired (in acres) | a |  |  | 1,500 |  |  |  |  |
Silver Nip Citrus | Pru Loans A & B |  |  |  |  |  |  |  |
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 | Pru Loan E |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 3.85% |  |  |  |  |
Silver Nip Citrus | Pru Loan F |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Fixed interest rate |  |  | 3.45% |  |  |  |  |
Silver Nip Citrus | Silver Nip Citrus Debt |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Deferred Financing Costs, Net |  |  |  | $ 325,000 |  |  |  |
Silver Nip Citrus | Silver Nip Citrus Debt | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Limited guaranty | $ 8,000,000 |  |  |  |  |  |  |
Maximum | Silver Nip Citrus | Silver Nip Citrus Debt | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Consolidated current covenant ratio | 1.50 |  |  |  |  |  |  |
Minimum | Silver Nip Citrus | Silver Nip Citrus Debt | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Consolidated current covenant ratio | 1.00 |  |  |  |  |  |  |

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