Revenue (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
|
| Disaggregation of Revenue [Line Items] | ||
| Revenue | $ 551,049 | $ 538,083 |
| Truckload | ||
| Disaggregation of Revenue [Line Items] | ||
| Revenue | 367,781 | 354,319 |
| Less than truckload | ||
| Disaggregation of Revenue [Line Items] | ||
| Revenue | 157,945 | 154,940 |
| Other revenue | ||
| Disaggregation of Revenue [Line Items] | ||
| Revenue | 25,323 | 28,824 |
| Transactional | ||
| Disaggregation of Revenue [Line Items] | ||
| Revenue | 428,374 | 412,144 |
| Managed Transportation | ||
| Disaggregation of Revenue [Line Items] | ||
| Revenue | $ 122,675 | $ 125,939 |