v3.26.1
Long-Term Debt - Components of Long-Term Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
May 13, 2026
Dec. 31, 2025
Debt Instrument [Line Items]      
Secured Long-term Debt, Noncurrent $ 2,779,454   $ 1,799,616
Long-term Debt, Current Maturities 318,676   118,075
Long-term debt and capital leases, net of current maturities and related costs 2,460,778   1,681,541
Finance Lease, Liability 648,611 $ 263,200 403,060
Debt and Lease Obligation (29,464)   (16,648)
Debt Issuance Costs, Net $ 2,779,454   1,799,616
Minimum [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated percentage 4.44%    
Maximum [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated percentage 7.02%    
Weighted average fixed-interest rate on debt      
Debt Instrument [Line Items]      
Notes Payable $ 1,860,678   $ 1,062,935
Long-term Debt, Weighted Average Interest Rate, at Point in Time 5.70%   6.70%
Weighted average variable-interest rate on debt      
Debt Instrument [Line Items]      
Notes Payable $ 918,776   $ 736,681
Long-term Debt, Weighted Average Interest Rate, at Point in Time 5.80%   5.90%
Senior Secured Notes Due 2027 | Senior Notes      
Debt Instrument [Line Items]      
Long-term debt and capital leases, net of current maturities and related costs $ 675,476   $ 403,009
Debt instrument, interest rate, stated percentage 7.25%    
Senior Secured Notes Due 2027 | Minimum [Member] | Senior Notes      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated percentage 7.13%    
Senior Secured Notes Due 2027 | Maximum [Member] | Senior Notes      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated percentage 7.25%    
Consolidated Variable Interest Entities Due 2029      
Debt Instrument [Line Items]      
Long-term debt and capital leases, net of current maturities and related costs $ 108,731   95,111
Consolidated Variable Interest Entities Due 2029 | Minimum [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated percentage 2.92%    
Consolidated Variable Interest Entities Due 2029 | Maximum [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated percentage 5.19%    
Revolving Credit Facilities Due 2027 | Revolving Credit Facility      
Debt Instrument [Line Items]      
Long-term debt and capital leases, net of current maturities and related costs $ 0   0
Secured Debt By Aircraft, Engines, Other Equipment And Real Estate | Secured Debt      
Debt Instrument [Line Items]      
Long-term debt and capital leases, net of current maturities and related costs $ 1,186,936   915,084
Secured Debt By Aircraft, Engines, Other Equipment And Real Estate | Minimum [Member] | Secured Debt      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated percentage 1.87%    
Secured Debt By Aircraft, Engines, Other Equipment And Real Estate | Maximum [Member] | Secured Debt      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated percentage 7.78%    
Total debt and finance lease obligations | Unsecured debt      
Debt Instrument [Line Items]      
Long-term debt and capital leases, net of current maturities and related costs $ 2,808,918   1,816,264
Enhanced Equipment Trust Certificate      
Debt Instrument [Line Items]      
Long-term debt and capital leases, net of current maturities and related costs $ 189,164   $ 0
Enhanced Equipment Trust Certificate | Minimum [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated percentage 4.13%    
Enhanced Equipment Trust Certificate | Maximum [Member]      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated percentage 7.10%