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Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2014 | Dec. 31, 2015 | Sep. 30, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |  |  |  |
Goodwill impairment charge |  |  |  |  | $ 0 | $ 56,166 | $ 0 |
Goodwill | $ 63,934 | $ 72,365 | $ 63,934 |  | $ 63,934 | 63,934 | 72,365 | $ 58,554
Long term earnings growth percentage | 2.50% |  |  |  | 2.50% |  |  |
Weighted average cost of capital percentage | 8.80% |  |  |  | 8.80% |  |  |
Amortization expense for intangible assets |  |  |  |  | $ 16,800 | 14,500 | 8,800 |
Expected future annual amortization expense, 2017 | $ 16,100 |  |  |  | 16,100 |  |  |
Expected future annual amortization expense, 2018 | 15,600 |  |  |  | 15,600 |  |  |
Expected future annual amortization expense, 2019 | 14,800 |  |  |  | 14,800 |  |  |
Expected future annual amortization expense, 2020 | 13,600 |  |  |  | 13,600 |  |  |
Expected future annual amortization expense, 2021 | 12,900 |  |  |  | 12,900 |  |  |
Grain |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |  |  |  |
Goodwill impairment charge |  |  | 54,200 |  |  | 46,422 |  |
Goodwill | 0 | 46,422 | 0 |  | 0 | 0 | 46,422 | 38,165
Retail |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |  |  |  |
Impairment charges related to software | 500 |  |  |  |  |  |  |
Plant Nutrient |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |  |  |  |
Goodwill impairment charge |  |  |  | $ 2,000 |  | 9,744 |  |
Goodwill | 59,767 | 21,776 | $ 59,767 |  | 59,767 | $ 59,767 | $ 21,776 | $ 16,222
Plant Nutrient | Wholesale |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |  |  |  |
Goodwill | $ 59,100 |  |  |  | $ 59,100 |  |  |
Reporting unit, percentage of fair value in excess of carrying amount | 8.00% |  |  |  | 8.00% |  |  |
Customer list | Grain |  |  |  |  |  |  |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |  |  |  |  |  |
Goodwill impairment charge |  | $ 1,500 |  |  |  |  |  |

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