| **Income Taxes - Additional Information (Details) (USD $)**    | 3 Months Ended |         |
|----------------------------------------------------------------|----------------|---------|
||
| **Operating Loss Carryforwards [Line Items]**                  |           |    |   |
| Deferred tax assets, valuation allowance                       | $ 6,653,000    |    | $ 95,953,000 |
| Deferred tax liabilities                                       | 11,053,000     |    | 0 |
| Deferred tax asset (liability)                                 | (11,053,000)   |    | 12,866,000 |
| (Decrease) increase in valuation allowance                     | (89,300,000)   | 807,000 |   |
| Federal                                                        |           |    |   |
| **Operating Loss Carryforwards [Line Items]**                  |           |    |   |
| Operating loss carryforwards, amount utilized                  | 76,800,000     |    |   |
| Operating loss carryforwards                                   | 0              |    |   |
| State                                                          |           |    |   |
| **Operating Loss Carryforwards [Line Items]**                  |           |    |   |
| Operating loss carryforwards, amount utilized                  | 314,100,000    |    |   |
| Operating loss carryforwards                                   | 279,000,000    |    |   |
| Adjustments for New Accounting Pronouncement                   |           |    |   |
| **Operating Loss Carryforwards [Line Items]**                  |           |    |   |
| Reduction to Accrued liabilities and deferred credits          | 1,700,000      |    |   |
| AgReserves Sale                                                |           |    |   |
| **Operating Loss Carryforwards [Line Items]**                  |           |    |   |
| Total before tax                                               | 502,600,000    |    |   |
| Sales of real estate, gain recorded on sale, taxable, deferred | 179,900,000    |    |   |
| Deferred income, term                                          | 15 years       |    |   |
| Deferred tax liabilities, gross                                | $ 69,200,000   |    |   |

| X                                                                                                                                                                                                                                                                                             |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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Operating Loss Carryforwards, Amount Utilized In Period
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| X                                                                                                                                                                                                                                                                                    |
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| - Definition
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of deferred tax liability attributable to taxable temporary differences.
+ References
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences.
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| - Definition
Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of deferred tax liability attributable to taxable temporary differences net of deferred tax asset attributable to deductible temporary differences and carryforwards after valuation allowances.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The noncurrent portion of the amount recognized for uncertain tax positions as of the balance sheet date.
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| - Definition
Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.
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