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LONG-TERM DEBT AND FINANCING ARRANGEMENTS - Assets securing notes (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Financing Arrangements |  |  |
Total assets securing notes payable or held under finance leases | $ 271,665 | $ 353,093 |
Less accumulated depreciation and amortization | 88,696 | 115,424 |
Net assets securing notes payable or held under finance leases | 182,969 | 237,669 |
Interest paid, net of capitalized interest | 8,700 | 11,300 | $ 10,900
Capitalized interest | 500 | 300 | $ 200
Revenue equipment |  |  |
Financing Arrangements |  |  |
Total assets securing notes payable or held under finance leases | 241,892 | 326,823 |
Service, office, and other equipment |  |  |
Financing Arrangements |  |  |
Total assets securing notes payable or held under finance leases | $ 29,773 | $ 26,270 |

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- Definition Amount of accumulated depreciation and amortization on property, plant and equipment pledged to secure a debt instrument. + References No definition available. + Details
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