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Acquisitions and Dispositions - Acquisition of Orange-Co, LP Assets (Details) |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jun. 01, 2016 USD ($) | Dec. 01, 2015 USD ($) | Dec. 02, 2014 USD ($) a | Dec. 01, 2014 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2014 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |
Additional consideration |  |  |  |  | $ 0 | $ 265,587,000 | $ 32,769,000
Citree |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Ownership interest (as a percent) |  |  | 51.00% |  |  |  |
Orange-Co |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Area of land acquired (in acres) | a |  |  | 20,263 |  |  |  |
Cost of total assets acquired |  |  | $ 277,792,000 |  |  |  |
Cash acquired |  |  | 2,060,000 |  |  |  |
Fair value attributable to noncontrolling interest |  |  | 4,838,000 |  |  |  |
Initial cash consideration |  |  | 147,500,000 |  |  |  |
Additional cash consideration (up to) |  |  | 7,500,000 |  |  |  |
Term loan debt |  |  | 500,000 |  |  |  |
Other liabilities |  |  | 4,705,000 |  |  |  |
Standby letter of credit issued |  |  |  | $ 7,500,000 |  |  |
Additional consideration | $ 3,750,000 | $ 3,750,000 | 97,126,000 |  |  |  |
Orange-Co | General and Administrative Expense |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Professional and legal costs |  |  |  |  | $ 31,000 | $ 3,078,000 |
Orange-Co | Refinancing Debt |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Term loan debt |  |  | 92,290,000 |  |  |  |
Working capital facility |  |  | $ 27,857,000 |  |  |  |

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