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Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Property, Plant and Equipment [Line Items] |  |  |
Restricted Cash and Cash Equivalents | $ 8,700 |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Maximum period in which contracts for the sale of grain to processors or other consumers extend | 1 year |  |
Marketing lease agreement term | 5 years |  |
Marketing balance payable |  | $ 200 | $ 3,700
Property subject to or available for leases statutory life minimum | 40 years |  |
Property subject to or available for leases statutory life maximum | 50 years |  |
Accrued compensation liability | $ 6,700 | 7,500 |
Decrease in retained earnings | $ (642,687) | (647,517) |
Minimum |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Intangible assets estimated useful life | 1 year |  |
Maximum |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Intangible assets estimated useful life | 10 years |  |
Operating, administrative and general expenses |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Advertising expense | $ 2,500 | $ 1,900 | $ 2,500
Barges | Minimum |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Asset estimated average useful life | 30 years |  |
Barges | Maximum |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Asset estimated average useful life | 40 years |  |
Land Improvements |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Asset estimated average useful life | 16 years |  |
Leasehold Improvements | Minimum |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Asset estimated average useful life | 3 years |  |
Leasehold Improvements | Maximum |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Asset estimated average useful life | 20 years |  |
Buildings and Storage Facilities | Minimum |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Asset estimated average useful life | 10 years |  |
Buildings and Storage Facilities | Maximum |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Asset estimated average useful life | 40 years |  |
Machinery and Equipment | Minimum |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Asset estimated average useful life | 3 years |  |
Machinery and Equipment | Maximum |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |
Asset estimated average useful life | 20 years |  |

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