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Long-Term Debt and Financing Arrangements (Tables) | 9 Months Ended
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Sep. 30, 2021
Debt Disclosure [Abstract] |
Schedule of Outstanding Debt |
| September 30, |  |  | December 31, |
| 2021 |  |  | 2020 |
| (in thousands) |
Interim funding for equipment received and expected to be converted to an equipment note in subsequent period; interest paid at a variable rate | $ | 10,440 |  |  | $ | 8,902 |
Secured Equipment Notes due on various dates in 2026 commencing on various dates in 2021; interest is paid monthly at a fixed annual rate between 1.48% and 1.83% |  | 67,656 |  |  |  | - |
Secured Equipment Notes due on various dates in 2025 commencing on various dates in 2020; interest is paid monthly at a fixed annual rate between 1.51% and 1.80% |  | 63,211 |  |  |  | 74,494 |
Secured Equipment Notes due on various dates in 2024 commencing on various dates in 2017, 2019 and 2020; interest is paid monthly at a fixed annual rate between 2.50% and 3.59% |  | 37,730 |  |  |  | 49,920 |
Secured Equipment Notes due on various dates in 2023 commencing on various dates in 2016 through 2019; interest is paid monthly at a fixed annual rate of between 2.20% and 4.20% |  | 72,275 |  |  |  | 112,668 |
Secured Equipment Notes due on various dates in 2022 commencing on various dates in 2015 through 2017; interest is paid monthly at a fixed annual rate between 2.20% and 2.90% |  | 4,679 |  |  |  | 8,943 |
Secured Equipment Notes due on various dates in 2021 commencing on various dates in 2014 through 2017; interest is paid monthly at a fixed annual rate between 2.02% and 2.96% |  | 2,259 |  |  |  | 15,432 |
|  | 258,250 |  |  |  | 270,359 |
Less current portion |  | (92,598 | ) |  |  | (93,562 | )
Total long-term debt | $ | 165,652 |  |  | $ | 176,797 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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