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Leases, Commitments, Guarantees and Contingencies (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
USD ($)
aircraft
Sep. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
aircraft
Sep. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
Lessee, Lease, Description [Line Items]          
Operating lease right-of-use assets $ 84,751   $ 84,751   $ 87,731
Current maturities of lease liabilities 20,000   20,000    
Noncurrent operating leases $ 64,832   64,832   $ 67,264
Operating leases     $ 25,400    
Weighted-average remaining lease term for operating leases 10 years 3 months 18 days   10 years 3 months 18 days    
Weighted-average discount rate for operating leases 6.20%   6.20%    
Lease costs          
Operating lease cost $ 10,086 $ 6,583 $ 27,282 $ 20,500  
Variable and short-term lease cost 635 453 1,763 2,029  
Sublease income (956) (1,268) (3,075) (3,782)  
Total lease cost $ 9,765 $ 5,768 $ 25,970 $ 18,747  
Aircraft          
Lessee, Lease, Description [Line Items]          
Number of aircraft acquired | aircraft     8    
Number of aircraft subleased | aircraft 8   8    
Aircraft | Minimum          
Lessee, Lease, Description [Line Items]          
Remaining lease term 4 years   4 years    
Aircraft | Maximum          
Lessee, Lease, Description [Line Items]          
Remaining lease term 5 years   5 years    
Airport Facilities | Minimum          
Lessee, Lease, Description [Line Items]          
Remaining lease term 1 month   1 month    
Airport Facilities | Maximum          
Lessee, Lease, Description [Line Items]          
Remaining lease term 31 years   31 years