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Acquisitions and Goodwill (Tables) | 3 Months Ended
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Mar. 31, 2018
Goodwill [Line Items] |
Schedule of Purchase Price Allocation [Table Text Block] | The following table presents the allocation of the Atlantic purchase price to the assets acquired and liabilities assumed based on their estimated fair values and resulting residual goodwill (in thousands):
| Atlantic | KCL
| May 7, 2017 | October 22, 2017
Tangible assets: |  |
Property and equipment | $ | 1,821 |  | $ | 223 |
Total tangible assets | 1,821 |  | 223 |
Intangible assets: |  |
Non-compete agreements | 1,150 |  | 6 |
Customer relationships | 13,400 |  | 234 |
Goodwill | 6,719 |  | 277 |
Total intangible assets | 21,269 |  | 517 |
Total assets acquired | 23,090 |  | 740 |
Liabilities assumed: |  |
Current liabilities | 590 |  | 100 |
Total liabilities assumed | 590 |  | 100 |
Net assets acquired | $ | 22,500 |  | $ | 640 |
Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] | The acquired definite-lived intangible assets have the following useful lives:
| Useful Lives
| Atlantic | KCL
Customer relationships | 15 years | 15 years
Non-compete agreements | 5 years | 2 years
Schedule of Goodwill [Table Text Block] | There were no changes to goodwill for the three months ended March 31, 2018. Approximately $112,527 of goodwill is deductible for tax purposes. The following is a summary of the goodwill balances as of March 31, 2018.
|  | Ending balance, March 31, 2018
Expedited LTL |  |
Goodwill |  | $ | 97,593 |
Accumulated Impairment |  | — |
TLS |  |
Goodwill |  | 45,164 |
Accumulated Impairment |  | (25,686 | )
Pool Distribution |  |
Goodwill |  | 12,359 |
Accumulated Impairment |  | (6,953 | )
Intermodal |  |
Goodwill |  | 69,194 |
Accumulated Impairment |  | — |
Total |  | $ | 191,671 |

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- Definition Tabular disclosure of the characteristics, including initial carrying value, residual amount, weighted average useful life, of finite-lived intangible assets acquired during the period by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by nature or by their use in the operations of the company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of a material business combination completed during the period, including background, timing, and recognized assets and liabilities. This table does not include leveraged buyouts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1486-128463 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65885119&loc=d3e1392-128463 + Details
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