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Note 17 - Revenue and Business Segments (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
(Dollars in thousands) |  | 2020 |  |  | 2019 |  |  | 2018 |
Operating revenue: |  |  |  |  |  |  |  |  |  |  |  |
Truckload revenue, net of fuel surcharge revenue |  | $ | 342,357 |  |  | $ | 329,304 |  |  | $ | 322,324 |
Truckload fuel surcharge revenue |  |  | 36,791 |  |  |  | 48,696 |  |  |  | 53,016 |
Total Truckload revenue |  |  | 379,148 |  |  |  | 378,000 |  |  |  | 375,340 |
Dedicated revenue, net of fuel surcharge revenue |  |  | 271,550 |  |  |  | 223,935 |  |  |  | 187,137 |
Dedicated fuel surcharge revenue |  |  | 38,234 |  |  |  | 42,049 |  |  |  | 36,715 |
Total Dedicated revenue |  |  | 309,784 |  |  |  | 265,984 |  |  |  | 223,852 |
Intermodal revenue, net of fuel surcharge revenue |  |  | 79,944 |  |  |  | 77,750 |  |  |  | 85,572 |
Intermodal fuel surcharge revenue |  |  | 8,789 |  |  |  | 12,644 |  |  |  | 16,453 |
Total Intermodal revenue |  |  | 88,733 |  |  |  | 90,394 |  |  |  | 102,025 |
Brokerage revenue |  |  | 96,709 |  |  |  | 108,893 |  |  |  | 86,377 |
Total operating revenue |  | $ | 874,374 |  |  | $ | 843,271 |  |  | $ | 787,594 |
Operating income: |  |  |  |  |  |  |  |  |  |  |  |
Truckload |  | $ | 39,637 |  |  | $ | 29,666 |  |  | $ | 35,067 |
Dedicated |  |  | 40,909 |  |  |  | 31,245 |  |  |  | 18,589 |
Intermodal |  |  | 5,730 |  |  |  | 6,612 |  |  |  | 11,150 |
Brokerage |  |  | 6,970 |  |  |  | 8,975 |  |  |  | 5,542 |
Total operating income |  | $ | 93,246 |  |  | $ | 76,498 |  |  | $ | 70,348 |

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