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Leases - Narrative (Details)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
aircraft
Jun. 30, 2023
USD ($)
aircraft
Dec. 31, 2023
USD ($)
aircraft
Dec. 31, 2022
USD ($)
aircraft
Lessee, Lease, Description [Line Items]            
Number of aircrafts operated | aircraft     32   42 30
Additional variable costs | $ $ 4,818 $ 2,759 $ 8,239 $ 4,709 $ 12,689 $ 13,778
Number of aircrafts in sale-leaseback transaction | aircraft       2 10  
Gain on sale-leaseback | $       $ 501 $ 10,223  
Minimum            
Lessee, Lease, Description [Line Items]            
Lease term 2 years   2 years   2 years  
Minimum | Charter Flight Services            
Lessee, Lease, Description [Line Items]            
Lease term 2 years   2 years   2 years  
Maximum            
Lessee, Lease, Description [Line Items]            
Lease term 30 years   30 years   30 years  
Maximum | Charter Flight Services            
Lessee, Lease, Description [Line Items]            
Lease term 6 years   6 years   6 years