Operations and Summary of Significant Accounting Policies - Goodwill Roll Forward (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
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| Goodwill [Roll Forward] | ||
| Balance, beginning of period | $ 266,752 | $ 244,982 |
| Acquisitions | 34,754 | 21,770 |
| Acquisition adjustment | 4,678 | |
| Balance, ending of period | 306,184 | 266,752 |
| Expedited Freight | ||
| Goodwill [Roll Forward] | ||
| Balance, beginning of period | 169,288 | 165,268 |
| Acquisitions | 0 | 4,020 |
| Acquisition adjustment | 0 | |
| Balance, ending of period | 169,288 | 169,288 |
| Intermodal | ||
| Goodwill [Roll Forward] | ||
| Balance, beginning of period | 97,464 | 79,714 |
| Acquisitions | 34,754 | 17,750 |
| Acquisition adjustment | 4,678 | |
| Balance, ending of period | $ 136,896 | $ 97,464 |
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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