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Note 17 - Segment Information - Segment Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Total revenues |  | $ 1,131,476 | $ 1,103,573 | $ 1,216,858
Salaries, wages, and related expenses |  | 423,319 | 400,491 | 402,276
Fuel expense |  | 115,981 | 133,291 | 166,410
Operations and maintenance |  | 61,696 | 63,753 | 79,051
Revenue equipment rentals and purchased transportation |  | 254,302 | 271,893 | 325,624
Operating taxes and licenses |  | 11,954 | 13,409 | 11,931
Insurance and claims |  | 59,845 | 50,099 | 50,547
Communications and utilities |  | 5,407 | 5,012 | 5,385
General supplies and expenses |  | 66,053 | 49,444 | 37,762
Gain on disposition of property and equipment, net |  | 1,630 | (12,585) | (40,322)
Segment operating expenses |  | 1,086,716 | 1,044,750 | 1,096,176
Segment operating income |  | 44,760 | 58,823 | 120,682
Cargo and Freight [Member] |  |  |  |
Total revenues |  | 1,013,941 | 970,509 | 1,046,396
Fuel Surcharge [Member] |  |  |  |
Total revenues |  | 117,535 | 133,064 | 170,462
Operating Segments [Member] |  |  |  |
Total revenues |  | 1,131,476 |  |
Segment operating expenses |  | 1,028,798 | 1,015,858 | 1,086,526
Segment operating income |  | 102,678 | 87,715 | 130,332
Operating Segments [Member] | Cargo and Freight [Member] |  |  |  |
Total revenues |  | 1,013,941 | 970,509 | 1,046,396
Operating Segments [Member] | Fuel Surcharge [Member] |  |  |  |
Total revenues | [1] | 117,535 | 133,064 | 170,462
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] |  |  |  |
Other operating loss (2) | [2] | (57,918) | (28,892) | (9,650)
Highway Services [Member] |  |  |  |
Total revenues |  |  | 423,820 | 452,713
Highway Services [Member] | Operating Segments [Member] |  |  |  |
Total revenues |  | 416,461 |  |
Salaries, wages, and related expenses |  | 136,453 | 138,897 | 139,950
Fuel expense |  | 64,661 | 75,671 | 88,574
Operations and maintenance |  | 39,651 | 45,836 | 46,747
Revenue equipment rentals and purchased transportation |  | 65,594 | 55,064 | 52,122
Operating taxes and licenses |  | 1,498 | 1,679 | 1,474
Insurance and claims |  | 26,321 | 25,500 | 23,069
Communications and utilities |  | 2 | 65 | 140
General supplies and expenses |  | 987 | 1,072 | 783
Depreciation and amortization |  | 23 | 2,074 | 895
Gain on disposition of property and equipment, net |  | 0 | (17) | 230
Total allocated overhead |  | 35,465 | 32,969 | 34,286
Segment operating expenses |  | 370,655 | 378,810 | 388,270
Segment operating income |  | 45,806 | 45,010 | 64,443
Highway Services [Member] | Operating Segments [Member] | Cargo and Freight [Member] |  |  |  |
Total revenues |  | 346,697 | 343,779 | 355,360
Highway Services [Member] | Operating Segments [Member] | Fuel Surcharge [Member] |  |  |  |
Total revenues | [1] | 69,764 | 80,041 | 97,353
Dedicated [Member] |  |  |  |
Total revenues |  | 364,414 | 320,287 | 362,997
Dedicated [Member] | Operating Segments [Member] |  |  |  |
Total revenues |  | 364,414 |  |
Salaries, wages, and related expenses |  | 141,051 | 116,383 | 126,625
Fuel expense |  | 50,063 | 55,686 | 76,254
Operations and maintenance |  | 36,983 | 32,061 | 37,416
Revenue equipment rentals and purchased transportation |  | 29,890 | 30,492 | 45,606
Operating taxes and licenses |  | 1,648 | 927 | 564
Insurance and claims |  | 15,882 | 14,929 | 20,867
Communications and utilities |  | 459 | 272 | 172
General supplies and expenses |  | 2,243 | 2,173 | 1,791
Depreciation and amortization |  | 12,238 | 5,187 | 22
Gain on disposition of property and equipment, net |  | (107) | (94) | 67
Total allocated overhead |  | 40,750 | 35,805 | 30,624
Segment operating expenses |  | 331,100 | 293,821 | 340,008
Segment operating income |  | 33,314 | 26,466 | 22,989
Dedicated [Member] | Operating Segments [Member] | Cargo and Freight [Member] |  |  |  |
Total revenues |  | 317,787 | 268,465 | 291,199
Dedicated [Member] | Operating Segments [Member] | Fuel Surcharge [Member] |  |  |  |
Total revenues | [1] | 46,627 | 51,822 | 71,798
Managed Freight [Member] |  |  |  |
Total revenues |  | 248,939 | 258,903 | 320,985
Managed Freight [Member] | Operating Segments [Member] |  |  |  |
Total revenues |  | 248,939 |  |
Salaries, wages, and related expenses |  | 9,180 | 8,534 | 10,671
Fuel expense |  | 0 | 0 | 9
Operations and maintenance |  | 1,421 | 1,228 | 207
Revenue equipment rentals and purchased transportation |  | 209,236 | 221,535 | 259,177
Operating taxes and licenses |  | 45 | 45 | 41
Insurance and claims |  | 913 | 2,812 | 1,712
Communications and utilities |  | 40 | 9 | 9
General supplies and expenses |  | 3,041 | 2,282 | 1,916
Depreciation and amortization |  | 84 | 388 | 71
Gain on disposition of property and equipment, net |  | 0 | 0 | 35
Total allocated overhead |  | 11,788 | 11,617 | 8,564
Segment operating expenses |  | 235,748 | 248,450 | 282,412
Segment operating income |  | 13,191 | 10,453 | 38,573
Managed Freight [Member] | Operating Segments [Member] | Cargo and Freight [Member] |  |  |  |
Total revenues |  | 248,939 | 258,903 | 320,985
Managed Freight [Member] | Operating Segments [Member] | Fuel Surcharge [Member] |  |  |  |
Total revenues | [1] | 0 | 0 | 0
Warehousing [Member] |  |  |  |
Total revenues |  |  | 100,563 | 80,163
Warehousing [Member] | Operating Segments [Member] |  |  |  |
Total revenues |  | 101,662 |  |
Salaries, wages, and related expenses |  | 46,299 | 49,495 | 44,553
Fuel expense |  | 1,473 | 1,544 | 1,660
Operations and maintenance |  | 5,419 | 5,658 | 3,620
Revenue equipment rentals and purchased transportation |  | 4,864 | 5,974 | 4,711
Operating taxes and licenses |  | 2,351 | 2,107 | 956
Insurance and claims |  | 792 | 1,699 | 865
Communications and utilities |  | 882 | 927 | 399
General supplies and expenses |  | 16,816 | 17,141 | 10,212
Depreciation and amortization |  | 1,759 | 765 | 672
Gain on disposition of property and equipment, net |  | 0 | 0 | 19
Total allocated overhead |  | 10,640 | 9,467 | 8,169
Segment operating expenses |  | 91,295 | 94,777 | 75,836
Segment operating income |  | 10,367 | 5,786 | 4,327
Warehousing [Member] | Operating Segments [Member] | Cargo and Freight [Member] |  |  |  |
Total revenues |  | 100,518 | 99,362 | 78,852
Warehousing [Member] | Operating Segments [Member] | Fuel Surcharge [Member] |  |  |  |
Total revenues | [1] | $ 1,144 | $ 1,201 | $ 1,311
[1] | The chief operating decision maker does not receive fuel surcharge revenue and fuel expense individually, but is provided with fuel expense less fuel surcharge revenue (other than the fuel surcharge revenue we reimburse to independent contractors and other third parties which is included in purchased transportation), which we refer to as net fuel expense. The chief operating decision maker uses net fuel expense to measure the effectiveness of our fuel surcharge program.
[2] | Other operating loss is attributable to unallocated corporate expenses.

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