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Assets Held for Sale - Narrative (Details) |  |  |  |  |  |  | 3 Months Ended | 6 Months Ended | 9 Months Ended
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Jun. 03, 2021 USD ($) a | Apr. 15, 2021 USD ($) a | Dec. 18, 2020 USD ($) a | Oct. 30, 2020 USD ($) a | Sep. 10, 2020 USD ($) a | Mar. 27, 2020 USD ($) | Jun. 30, 2021 USD ($) a | Jun. 30, 2020 USD ($) | Mar. 31, 2021 USD ($) | Jun. 30, 2021 USD ($) a | Jun. 30, 2020 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gain on sale of real estate, property and equipment and assets held for sale |  |  |  | $ 18,230,000 |  |  | $ 30,288,000 | $ 154,000 |  | $ 33,635,000 | $ 3,017,000
Acres Of Land Purchased | a |  |  |  | 3,280 |  |  |  |  |  |  |
Discontinued Operations, Disposed of by Sale |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gain on sale of real estate, property and equipment and assets held for sale |  |  |  |  | $ 28,500,000 |  |  |  |  |  |
Gain (loss) on disposal of discontinued operation |  |  |  |  | $ 27,470,000 |  |  |  |  |  |
Acres Of Land Purchased | a |  |  |  |  | 10,700 |  |  |  |  |  |
Discontinued Operations, Disposed of by Sale | Alico Ranch |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Acres Of Land Sold | a | 11,700 | 5,734 |  |  |  |  |  |  |  |  |
Gain on sale of real estate, property and equipment and assets held for sale | $ 12,219,000 | $ 14,445,000 |  |  |  |  |  |  |  |  |
Gain (loss) on disposal of discontinued operation | $ 11,351,000 | $ 13,921,000 |  |  |  |  | $ 1,800,000 |  |  |  |
Discontinued Operations, Disposed of by Sale | East Ranch |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Acres Of Land Sold | a |  |  | 600 |  |  |  | 1,160 |  |  | 1,160 |
Gain on sale of real estate, property and equipment and assets held for sale |  |  | $ 2,630,000 |  |  |  | $ 5,361,000 |  |  |  |
Gain (loss) on disposal of discontinued operation |  |  | $ 2,550,000 |  |  | $ 2,748,000 | $ 5,027,000 |  | $ 504,000,000 |  |
Acres Of Land Sold | a |  |  |  |  |  |  | 97 |  |  |  |
Consideration for discontinued operation |  |  |  |  |  | $ 2,980,000 |  |  |  |  |
Discontinued Operations, Disposed of by Sale | East Ranch | Employee |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gain on sale of real estate, property and equipment and assets held for sale |  |  |  |  |  |  | $ 392,000 |  |  |  |

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