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Goodwill (Tables) | 9 Months Ended
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Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Carrying Amount of Goodwill by Reportable Segment | The changes in the carrying amount of goodwill by reportable segment for the nine months ended September 30, 2019 are as follows:
(in thousands) | Trade |  | Plant Nutrient |  | Rail |  | Total
Balance as of January 1, 2019 | $ | 1,171 |  |  | $ | 686 |  |  | $ | 4,167 |  |  | $ | 6,024 |
Acquisitions (a) | 129,848 |  |  | — |  |  | — |  |  | 129,848 |
Balance as of September 30, 2019 | $ | 131,019 |  |  | $ | 686 |  |  | $ | 4,167 |  |  | $ | 135,872 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 + Details
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