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Agricultural Land Sale (Details) $ in Millions |  | 1 Months Ended | 2 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 17, 2018 USD ($) a | Feb. 28, 2019 USD ($) a | Jan. 31, 2019 | Dec. 31, 2019 USD ($) a | Dec. 31, 2018 USD ($) a | Dec. 31, 2020 USD ($)
Real Estate [Line Items] |  |  |  |  |  |
Contingency reserves |  |  |  | $ 62.0 |  | $ 62.0
Deferred revenue |  |  |  | $ 67.6 |  | 66.9
EMI |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |
Ownership interest held (percent) |  |  | 50.00% |  |  |
Maui | EMI |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |
Area of land sold (acres) | a |  |  |  |  | 41,000 |
Not Discontinued Operations | Maui | Maui Diversified Agriculture |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |
Ownership interest held (percent) | 100.00% |  |  |  |  |
Not Discontinued Operations | Maui | EMI |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |
Ownership interest held (percent) |  | 50.00% |  |  |  |
Not Discontinued Operations | Mahi Pono Holdings, LLC | Maui |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |
Area of land sold (acres) | a | 41,000 | 800 |  | 41,000 |  |
Proceeds from sale | $ 261.6 | $ 2.7 |  |  |  |
Contingency reserves | $ 19.5 |  |  |  |  |
Gross profit |  |  |  | $ 6.7 | $ 162.2 |
Not Discontinued Operations | Mahi Pono Holdings, LLC | Maui | State Water Leases |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |
Deferred revenue |  |  |  | $ 62.0 |  | $ 62.0

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