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Goodwill and Other Intangible Assets (Textual) (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |
Goodwill | $ 135,360 | $ 135,709 | $ 135,360 | $ 6,024 | $ 6,024
Impairments |  | 0 | 0 | 0 |
Amortization expense for intangible assets |  | 32,200 | 35,400 | 19,100 |
Expected future annual amortization expense of intangibles in 2019 |  | 30,800 |  |  |
Expected future annual amortization expense of intangibles in 2020 |  | 23,500 |  |  |
Expected future annual amortization expense of intangibles in 2021 |  | 22,300 |  |  |
Expected future annual amortization expense of intangibles in 2022 |  | 19,000 |  |  |
Expected future annual amortization expense of intangibles in 2023 |  | $ 12,600 |  |  |
Minimum |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |
Weighted average cost of capital percentage used to determine impairment or reporting unit |  | 8.75% |  |  |
Weighted average cost of capital percentage used to determine impairment or reporting unit, risk premium |  | 2.00% |  |  |
Maximum |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |
Weighted average cost of capital percentage used to determine impairment or reporting unit |  | 10.75% |  |  |
Weighted average cost of capital percentage used to determine impairment or reporting unit, risk premium |  | 4.00% |  |  |
Grain Storage and Merchandising |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |
Goodwill |  | $ 80,800 |  |  |
Percentage of FV in excess of carrying amount |  | 9.00% |  |  |
Food and Specialty Ingredients |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |
Goodwill |  | $ 41,300 |  |  |
Percentage of FV in excess of carrying amount |  | 14.00% |  |  |
Ethanol |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |
Goodwill |  | $ 8,800 |  |  |
Percentage of FV in excess of carrying amount |  | 6.00% |  |  |
Rail Repair |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |
Goodwill |  | $ 4,200 |  |  |
Lawn |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |
Goodwill |  | 700 |  |  |
Trade |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |
Goodwill | 127,781 | 122,067 | 127,781 | 1,171 | 1,171
Goodwill, accumulated impairment loss |  | 46,400 |  |  |
Impairments |  | 0 | 0 | 0 |
Plant Nutrient |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |
Goodwill | 686 | 686 | 686 | 686 | $ 686
Goodwill, accumulated impairment loss |  | 68,900 |  |  |
Impairments |  | $ 0 | $ 0 | $ 0 |
Frac sand and propane | Trade |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |
Impairment charges | $ 2,500 |  |  |  |

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