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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Operating Lease Maturities As of December 31, 2023, the maturities of operating lease liabilities are as follows (in thousands):
Operating Leases
2024$21,929 
202515,508 
20268,870 
20274,583 
20283,472 
2029 and beyond5,707 
Total undiscounted cash payments60,069 
Less: amount representing interest(4,912)
Present value of future minimum lease payments55,157 
Less: current obligations under leases(20,167)
Long-term lease obligation$34,990 
Schedule of Employees Under Collective Bargaining Agreements
As of December 31, 2023, the flight crewmember employees of ABX, ATI and OAI and flight attendant employees of ATI and OAI were represented by the labor unions listed below:
AirlineLabor Agreement UnitPercentage of
the Company’s
Employees
ABXInternational Brotherhood of Teamsters5.4%
ATIAir Line Pilots Association11.1%
OAIInternational Brotherhood of Teamsters6.5%
ATIAssociation of Flight Attendants0.8%
OAIAssociation of Flight Attendants6.4%