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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Summary of Significant Accounting Policies [Abstract] |
Changes in Goodwill | The following table summarizes the changes in goodwill (in thousands):
|  | Marine Transportation |  |  | Distribution and Services |  |  | Total |
Balance at December 31, 2019 (gross) |  | $ | 424,149 |  |  | $ | 549,846 |  |  | $ | 973,995 |
Accumulated impairment and amortization |  |  | (18,574 | ) |  |  | (1,595 | ) |  |  | (20,169 | )
Balance at December 31, 2019 |  |  | 405,575 |  |  |  | 548,251 |  |  |  | 953,826 |
Impairment |  |  | — |  |  |  | (387,970 | ) |  |  | (387,970 | )
Savage acquisition |  |  | 81,635 |  |  |  | — |  |  |  | 81,635 |
Convoy acquisition |  |  | — |  |  |  | 10,309 |  |  |  | 10,309 |
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 December 31, 2021 (gross) |  |  | 505,784 |  |  |  | 560,155 |  |  |  | 1,065,939 |
Accumulated impairment and amortization |  |  | (237,626 | ) |  |  | (389,565 | ) |  |  | (627,191 | )
Balance at December 31, 2021 |  | $ | 268,158 |  |  | $ | 170,590 |  |  | $ | 438,748 |
Other Intangible Assets and Other Intangible Liabilities | The following table summarizes the balances of other intangible assets and other intangible liabilities (in thousands):
|  | December 31, |
|  | 2021 |  |  | 2020 |
Other intangible assets – gross |  | $ | 203,217 |  |  | $ | 203,217 |
Accumulated amortization |  |  | (143,147 | ) |  |  | (134,238 | )
Other intangible assets – net |  | $ | 60,070 |  |  | $ | 68,979 |
Other intangible liabilities – gross |  | $ | 13,860 |  |  | $ | 13,860 |
Accumulated amortization |  |  | (12,120 | ) |  |  | (10,960 | )
Other intangible liabilities – net |  | $ | 1,740 |  |  | $ | 2,900 |

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- Definition Tabular disclosure of assets and liabilities, excluding financial assets, liabilities and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References No definition available. + Details
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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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