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Note 5 - Segment Information - Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Revenue | $ 274,016 | $ 317,377 | $ 540,867 | $ 608,962
Operating income | 11,783 | 26,873 | 29,415 | 50,720
Operating Segments [Member] |  |  |  |
Revenue | 274,016 | 317,377 | 540,867 | 608,962
Operating income | 11,783 | 26,873 | 29,415 | 50,720
Intersegment Eliminations [Member] |  |  |  |
Revenue | 3,915 | 1,006 | 8,377 | 1,897
Consolidation, Eliminations [Member] |  |  |  |
Revenue | (3,915) | (1,006) | (8,377) | (1,897)
Expedited [Member] | Operating Segments [Member] |  |  |  |
Revenue | 104,073 | 121,643 | 204,969 | 220,440
Operating income | 5,815 | 14,610 | 15,091 | 23,941
Expedited [Member] | Intersegment Eliminations [Member] |  |  |  |
Revenue | 3,915 | 1,006 | 8,377 | 1,897
Dedicated [Member] | Operating Segments [Member] |  |  |  |
Revenue | 81,194 | 96,767 | 161,438 | 185,714
Operating income | 3,243 | 2,882 | 10,390 | 5,523
Dedicated [Member] | Intersegment Eliminations [Member] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Managed Freight [Member] | Operating Segments [Member] |  |  |  |
Revenue | 63,281 | 80,281 | 124,155 | 166,432
Operating income | 1,945 | 8,627 | 3,163 | 19,458
Managed Freight [Member] | Intersegment Eliminations [Member] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Warehousing [Member] | Operating Segments [Member] |  |  |  |
Revenue | 25,468 | 18,686 | 50,305 | 36,376
Operating income | 780 | 754 | 771 | 1,798
Warehousing [Member] | Intersegment Eliminations [Member] |  |  |  |
Revenue | $ 0 | $ 0 | $ 0 | $ 0

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