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Related Party Transactions - Silver Nip Citrus Merger Agreement (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 6 Months Ended |  |
--- | --- | --- | --- | ---
Feb. 28, 2015 | Mar. 31, 2016 | Mar. 31, 2015 | Sep. 30, 2015 | Feb. 27, 2015
Related Party Transaction [Line Items] |  |  |  |  |
Ownership interest (as a percent) |  | 51.00% | 51.00% |  |
Common stock, par value per share (in dollars per share) | $ 1.00 | $ 1 |  | $ 1.00 |
Closing price of common stock (in dollars per share) |  |  |  |  | $ 45.67
Merger Agreement |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Shares of common stock issued (in shares) | 923,257 | 148,705 |  |  |
Outstanding net indebtedness | $ 40,278 |  |  |  |
Other liabilities | 6,952 |  |  |  |
Book value of assets | 65,739 |  |  |  |
Total net assets | $ 18,470 |  |  |  |
Silver Nip Citrus | General and Administrative Expense |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Professional and legal costs |  |  | $ 811 |  |
734 Agriculture | Silver Nip Citrus |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Ownership interest (as a percent) | 74.89% |  |  |  |
Mr. Clay Wilson | Silver Nip Citrus |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Ownership interest (as a percent) | 5.00% |  |  |  |
Entity Controlled by Mr. Clay Wilson | Silver Nip Citrus |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Ownership interest (as a percent) | 20.11% |  |  |  |

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