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Discontinued Operations (Tables) | 3 Months Ended
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Mar. 31, 2019
Discontinued Operations And Disposal Groups [Abstract] |
Schedule of Discontinued Operations Relating to Income Statement, Balance Sheet and Cash Flow Activities | Income from discontinued operations is comprised of the following:
| Three Months Ended |
| March 31, 2018 |
Revenue | $ | 258,628 |
Transportation costs |  | 226,876 |
Gross margin |  | 31,752 |
Costs and expenses: |  |  |
Salaries and benefits |  | 3,703 |
General and administrative |  | 21,209 |
Depreciation and amortization |  | 242 |
Total costs and expenses |  | 25,154 |
Operating income from discontinued operations |  | 6,598 |
Other income |  |  |
Interest income |  | 10 |
Other, net |  | (5 | )
Total other income |  | 5 |
Income from discontinued operations before income taxes |  | 6,603 |
Provision for income taxes |  | 1,505 |
Income from discontinued operations | $ | 5,098 |
Total operating and investing cash flows of discontinued operations for the three months ended March 31, 2018 are comprised of the following, which exclude the effect of income taxes:
| Three Months Ended |
(in thousands) | March 31, 2018 |
Net cash provided by operating activities |  | 10,774 |
Net cash used in investing activities |  | (641 | )

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