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Note 16 - Segments - Segment Reporting Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Revenues from external customers | $ 5,126,142 | $ 4,735,940 | $ 5,809,847
Interest income | 657 | 713 | 1,680
Interest expense | 2,427 | 9,727 | 30,487
Depreciation and amortization | 53,354 | 57,456 | 55,372
Segment operating income | 309,036 | 154,605 | 216,405
Segment income from continuing operations before taxes | 313,683 | 151,723 | 189,523
Segment assets | 3,119,977 | 2,985,393 | 3,407,329
Goodwill | 370,331 | 292,142 | 292,142
Expenditures for segment assets | 167,177 | 136,200 | 293,493
Truck Segment [Member] |  |  |
Revenues from external customers | 5,109,070 | 4,721,058 | 5,794,155
Interest income | 657 | 713 | 1,680
Interest expense | 2,119 | 9,444 | 30,201
Depreciation and amortization | 53,096 | 57,162 | 55,036
Segment operating income | 307,394 | 153,841 | 216,691
Segment income from continuing operations before taxes | 312,350 | 151,222 | 188,122
Segment assets | 3,068,365 | 2,939,390 | 3,369,517
Goodwill | 367,771 | 289,582 | 289,582
Expenditures for segment assets | 163,624 | 135,956 | 292,980
Other Segments [Member] |  |  |
Revenues from external customers | 17,072 | 14,882 | 15,692
Interest expense | 308 | 283 | 286
Depreciation and amortization | 258 | 294 | 336
Segment operating income | 1,642 | 764 | (286)
Segment income from continuing operations before taxes | 1,333 | 501 | 1,401
Segment assets | 51,612 | 46,003 | 37,812
Goodwill | 2,560 | 2,560 | 2,560
Expenditures for segment assets | $ 3,553 | $ 244 | $ 513

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