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Note 5 - Segment Information - Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Revenue | $ 291,585 | $ 220,889
Operating income | 23,847 | 10,509
Operating Segments [Member] |  |
Revenue | 291,585 | 220,889
Operating income | 23,847 | 10,509
Intersegment Eliminations [Member] |  |
Revenue | 891 | 446
Consolidation, Eliminations [Member] |  |
Revenue | (891) | (446)
Highway Services [Member] | Operating Segments [Member] |  |
Revenue | 98,797 | 78,481
Operating income | 9,331 | 6,237
Highway Services [Member] | Intersegment Eliminations [Member] |  |
Revenue | 891 | 446
Dedicated [Member] | Operating Segments [Member] |  |
Revenue | 88,947 | 75,446
Operating income | 2,641 | (1,770)
Dedicated [Member] | Intersegment Eliminations [Member] |  |
Revenue | 0 | 0
Managed Freight [Member] | Operating Segments [Member] |  |
Revenue | 86,151 | 51,397
Operating income | 10,831 | 4,887
Managed Freight [Member] | Intersegment Eliminations [Member] |  |
Revenue | 0 | 0
Factoring [Member] | Operating Segments [Member] |  |
Revenue | 17,690 | 15,565
Operating income | 1,044 | 1,155
Factoring [Member] | Intersegment Eliminations [Member] |  |
Revenue | $ 0 | $ 0

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