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Related Party (Tables) | 12 Months Ended
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Dec. 31, 2018
Related Party [Abstract] |
Schedule of Related Party Transactions [Table Text Block] | The related payments (receipts) with related parties for the years ended December 31, 2018, 2017, and 2016 were as follows:
| December 31, 2018 |  | December 31, 2017 |  | December 31, 2016
| (in thousands) |  |  |  |
Payments for tractor purchases | — |  | $ | — |  | $ | 4,300
Receipts for trailer sales | — |  | (12) |  | (108)
Revenue equipment lease payments | — |  | — |  | 813
Payments for parts and services | 551 |  | 650 |  | 1,300
Terminal lease payments | 713 |  | 1,625 |  | 1,849
| 1,264 |  | 2,263 |  | $ | 8,154

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
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