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Leases, Commitments and Contingencies - Commitments and Obligations (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Operating lease payments for aircraft and facility obligations    
Apr - Dec 2022 $ 66,742  
2023 76,049  
2024 32,144  
2025 17,568  
2026 15,491  
Thereafter 72,827  
Total 280,821  
Firm aircraft and spare engine commitments    
Apr - Dec 2022 653,270  
2023 26,519  
Total 679,789  
Interest commitments    
Apr - Dec 2022 87,784  
2023 103,072  
2024 86,121  
2025 68,249  
2026 51,641  
Thereafter 88,717  
Total 485,584  
Principal maturities on long-term debt    
Apr - Dec 2022 315,901  
2023 422,380  
2024 418,088  
2025 485,348  
2026 429,621  
Thereafter 1,161,092  
Total long-term debt 3,232,430 $ 3,140,938
Total commitments and obligations    
Apr - Dec 2022 1,123,697  
2023 628,020  
2024 536,353  
2025 571,165  
2026 496,753  
Thereafter 1,322,636  
Total $ 4,678,624