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Long-Term Debt - Components of Long-Term Debt (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Instrument [Line Items] |  |
Secured Long-term Debt, Noncurrent | $ 2,218,889 | $ 2,259,654
Less current maturities | 485,641 | 439,937
Long-term debt and capital leases, net of current maturities and related costs | 1,733,248 | 1,819,717
Finance Lease, Liability | 442,752 | 455,248
Debt and Lease Obligation | (18,813) | (22,515)
Debt Issuance Costs, Net | $ 2,218,889 | 2,259,654
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 | 7.01% |
Weighted average fixed-interest rate on debt |  |
Debt Instrument [Line Items] |  |
Notes Payable | $ 1,787,240 | $ 1,834,754
Long-term Debt, Weighted Average Interest Rate, at Point in Time | 6.30% | 6.30%
Weighted average variable-interest rate on debt |  |
Debt Instrument [Line Items] |  |
Notes Payable | $ 431,649 | $ 424,900
Long-term Debt, Weighted Average Interest Rate, at Point in Time | 7.90% | 7.90%
Construction Loan Agreement Due 2032 |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital leases, net of current maturities and related costs | $ 350,000 | $ 350,000
Debt instrument, interest rate, stated percentage | 5.75% |
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 | $ 200,000 | 200,000
Debt instrument, interest rate, stated percentage | 7.93% |
Senior Secured Notes Due 2027 | Senior Notes |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital leases, net of current maturities and related costs | $ 550,000 | 550,000
Senior Secured Notes Due 2027 | Senior Notes | Maximum [Member] |  |
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 | $ 122,836 | 130,650
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% |
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 | $ 572,114 | 596,271
Secured Debt By Aircraft, Engines, Other Equipment And Real Estate | Secured Debt | Minimum [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument, interest rate, stated percentage | 1.87% |
Secured Debt By Aircraft, Engines, Other Equipment And Real Estate | Secured Debt | Maximum [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument, interest rate, stated percentage | 8.25% |
Long-term Debt [Member] | Unsecured Debt [Member] |  |
Debt Instrument [Line Items] |  |
Long-term debt and capital leases, net of current maturities and related costs | $ 2,237,702 | $ 2,282,169

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