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Goodwill (Tables) | 3 Months Ended
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Mar. 31, 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 three months ended March 31, 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 | 113,617 |  |  | — |  |  | — |  |  | 113,617 |
Balance as of March 31, 2019 | $ | 114,788 |  |  | $ | 686 |  |  | $ | 4,167 |  |  | $ | 119,641 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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