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Impairment of Long-lived Assets (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 USD ($) $ / shares | Dec. 31, 2017 USD ($) $ / shares | Dec. 31, 2018 USD ($) TankBarge | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Long-lived Assets Impairment [Abstract] |  |  |  |  |
Non-cash pre-tax impairment charge | $ 82,705 | $ 105,712 | $ 82,705 | $ 105,712 | $ 0
Impairment charge after tax effect | $ 65,337 | $ 66,975 |  |  |
Impairment charge after tax effect on earning per share (in dollars per share) | $ / shares | $ 1.09 | $ 1.20 |  |  |
Lease cancellation costs |  |  | 2,403 | 0 | $ 0
Vessels [Member] |  |  |  |  |
Long-lived Assets Impairment [Abstract] |  |  |  |  |
Non-cash pre-tax impairment charge | $ 78,835 |  |  |  |
Fair market value of assets | 13,247 | $ 12,550 | 13,247 | $ 12,550 |
Tank Barge [Member] |  |  |  |  |
Long-lived Assets Impairment [Abstract] |  |  |  |  |
Non-cash pre-tax impairment charge |  |  | $ 3,870 |  |
Number of vessels to be disposed of | TankBarge |  |  | 4 |  |
Fair market value of assets | 220 |  | $ 220 |  |
Scrap value of vessel | $ 220 |  | 220 |  |
Lease cancellation costs |  |  | $ 2,403 |  |

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- Definition Number of assets held-for-sale that are not part of a disposal group, expected to be disposed of after one year or the normal operating cycle, if longer. + References No definition available. + Details
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