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Acquisitions and Dispositions - Property Sales (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2014 USD ($) | Apr. 03, 2015 USD ($) | Jul. 01, 2014 USD ($) a
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Gain on sale of assets | $ (147) | $ 290 | $ 6,742 |  |
Land and land improvements |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Property, Plant and Equipment, Gross | $ 116,648 | $ 114,428 |  |  |
Land and land improvements | Silver Nip Citrus |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Property, Plant and Equipment, Gross |  |  | 2,832 |  |
Gain on sale of assets |  |  | 2,927 |  |
Polk County Real Estate Parcel |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Area of land owned (in acres) | a |  |  |  |  | 2,800
Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Net cash proceeds |  |  |  | $ 1,509 |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Land and land improvements | Silver Nip Citrus |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Net cash proceeds |  |  | $ 5,759 |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Polk County Real Estate Parcel |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Net cash proceeds |  |  |  |  | $ 5,623

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