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Goodwill | 6 Months Ended
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Jun. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill | Goodwill The changes in the carrying amount of goodwill by reportable segment for the six months ended June 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 | 129,848 |  |  | — |  |  | — |  |  | 129,848 |
Balance as of June 30, 2019 | $ | 131,019 |  |  | $ | 686 |  |  | $ | 4,167 |  |  | $ | 135,872 |
Acquisitions represent the LTG acquisition's preliminary goodwill allocation.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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