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Deferred Gain on Sale - Narrative (Details) $ in Thousands |  |  |  | 3 Months Ended | 12 Months Ended | 52 Months Ended
--- | --- | --- | --- | --- | --- | ---
Oct. 01, 2018 USD ($) | Feb. 02, 2017 USD ($) a | Nov. 21, 2014 USD ($) a | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Mar. 11, 2019 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Deferred gain on sale |  |  |  |  |  | $ 0 | $ 24,928 |  |
Gain on sale of investment in real estate |  |  |  |  |  | 13,166 | 11,041 | $ 2,181 |
Change in fair value of derivatives |  |  |  |  |  | (989) | 0 | $ 0 |
Hendry County Florida |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Post-closing adjustment period |  |  | 10 years |  |  |  |  |  |
Aggregate amount of payments made due to post closing agreement |  |  |  |  |  |  |  |  | $ 6,518
Amount to be deposited into escrow |  |  |  |  |  |  | $ 11,300 |  |
Discontinued Operations, Disposed of by Sale |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Consideration for discontinued operation |  |  |  |  |  | $ 47 |  |  |
Discontinued Operations, Disposed of by Sale | Hendry County Florida |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Acres of land | a |  | 49 | 36,000 |  |  |  |  |  |
Consideration for discontinued operation |  | $ 2,200 | $ 97,900 |  |  |  |  |  |
Post-closing adjustment period |  |  | 10 years |  |  |  |  |  |
Realized gain on disposal |  |  | $ 42,753 |  |  |  |  |  |
Deferred gain on sale |  |  | 29,140 |  |  |  |  |  |
Gain on sale of investment in real estate |  | $ 1,371 | $ 13,613 |  |  |  |  |  |
ASC 610-20 | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Net adjustment to retained earnings | $ 10,897 |  |  |  |  |  |  |  |
Derivative asset | 3,553 |  |  |  |  |  |  |  |
Other current liabilities | $ 13,864 |  |  |  |  |  |  |  |
Change in fair value of derivatives |  |  |  | $ (33) | $ (956) |  |  |  |

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