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Leases, Commitments and Contingencies - Commitments and Obligations (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Operating lease payments for aircraft and facility obligations |  |
Oct - Dec 2020 | $ 22,393 |
2021 | 85,599 |
2022 | 76,923 |
2023 | 69,419 |
2024 | 28,091 |
Thereafter | 98,448 |
Total | 380,873 |
Firm aircraft and spare engine commitments |  |
Oct - Dec 2020 | 114,223 |
2021 | 139,003 |
2022 | 402,680 |
Total | 655,906 |
Interest commitments |  |
Oct - Dec 2020 | 28,777 |
2021 | 114,652 |
2022 | 99,811 |
2023 | 82,790 |
2024 | 67,376 |
Thereafter | 147,656 |
Total | 541,062 |
Principal maturities on long-term debt |  |
Oct - Dec 2020 | 69,405 |
2021 | 387,309 |
2022 | 388,152 |
2023 | 397,913 |
2024 | 351,431 |
Thereafter | 1,507,447 |
Total long-term debt | 3,101,657 | $ 3,017,523
Total commitments and obligations |  |
Oct - Dec 2020 | 234,798 |
2021 | 726,563 |
2022 | 967,566 |
2023 | 550,122 |
2024 | 446,898 |
Thereafter | 1,753,551 |
Total | $ 4,679,498 |
Percentage of variable rate notes on total long-term debt | 2.40% |

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