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Goodwill (Tables)
9 Months Ended
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