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Derivative Asset and Derivative Liabilities/Deferred Gain on Sale - Narrative (Details) a in Thousands, $ in Thousands |  |  |  |  | 3 Months Ended | 6 Months Ended | 52 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 27, 2020 USD ($) | Dec. 07, 2018 USD ($) | Oct. 30, 2018 USD ($) | Nov. 21, 2014 USD ($) a | Mar. 31, 2020 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Mar. 31, 2020 USD ($) | Mar. 31, 2019 USD ($) | Mar. 11, 2019 USD ($) | Sep. 30, 2019 USD ($) | Oct. 01, 2018 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of investment in real estate |  |  |  |  | $ 2,838 | $ 1 |  | $ 2,863 | $ 23 |  |  |
Retained earnings |  |  |  |  | 201,065 |  |  | 201,065 |  |  |  |
Loss on derivatives |  |  |  |  | $ 0 | 33 |  | $ 0 | 989 |  |  |
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 | $ 2,952 |  | $ 206,000 |  |  |  |  |  |  |  | $ 47 |
Aggregate amount of payments made due to post closing agreement | $ (2,838) |  | $ (12,000) |  |  |  |  |  |  |  |  |
Discontinued Operations, Disposed of by Sale | Hendry County Florida |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Acres of land | a |  |  |  | 36 |  |  |  |  |  |  |  |
Consideration for discontinued operation |  |  |  | $ 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 |  |  |  | $ 13,613 |  |  |  |  |  |  |  |
ASC 610-20 |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Retained earnings |  |  |  |  |  | $ (3,704) |  |  | (3,704) |  |  |
ASC 610-20 | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Retained earnings |  |  |  |  |  |  |  |  |  |  |  | $ 10,897
Derivative asset |  |  |  |  |  |  |  |  |  |  |  | 3,553
Other current liabilities |  |  |  |  |  |  |  |  |  |  |  | $ 13,864
Loss on derivatives |  |  |  |  |  |  | $ 956 |  | $ 33 |  |  |

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