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Impairments and Other Charges (Tables) | 9 Months Ended
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Sep. 30, 2021
Impairments and Other Charges [Abstract] |
Summary of Changes in Goodwill | The following table summarizes the changes in goodwill during 2021 (in thousands):
|  | Marine Transportation |  |  | Distribution and Services |  |  | Total |
Balance at December 31, 2020 (gross) |  | $ | 505,784 |  |  | $ | 560,155 |  |  | $ | 1,065,939 |
Accumulated impairment and amortization |  |  | (18,574 | ) |  |  | (389,565 | ) |  |  | (408,139 | )
Balance at December 31, 2020 |  |  | 487,210 |  |  |  | 170,590 |  |  |  | 657,800 |
Impairment |  |  | (219,052 | ) |  |  | — |  |  |  | (219,052 | )
Balance at September 30, 2021 |  |  | 505,784 |  |  |  | 560,155 |  |  |  | 1,065,939 |
Accumulated impairment and amortization |  |  | (237,626 | ) |  |  | (389,565 | ) |  |  | (627,191 | )
Balance at September 30, 2021 |  | $ | 268,158 |  |  | $ | 170,590 |  |  | $ | 438,748 |

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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=121556970&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=121556970&loc=d3e13854-109267 + Details
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