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v3.25.2

Long-term Debt (Details) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2025 USD ($) aircraft | Dec. 31, 2024 USD ($)
Debt Instrument [Line Items] |  |
Current portion of long-term debt | $ 493,874 | $ 539,061
Current portion of unamortized debt issue cost, net | (3,338) | (3,472)
Current portion of long-term debt, net of debt issue costs | 490,536 | 535,589
Long-term debt, net of current maturities | 2,020,771 | 2,153,558
Long-term portion of unamortized debt issue cost, net | (14,737) | (16,772)
Long-term debt, net of current maturities and debt issue costs | 2,006,034 | 2,136,786
Total long-term debt (including current portion) | 2,514,645 | 2,692,619
Total unamortized debt issue cost, net | (18,075) | (20,244)
Total long-term debt, net of debt issue costs | $ 2,496,570 | 2,672,375
Effective interest rate (as a percent) | 4.30% |
Basis spread on variable rate | 3.50% |
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:SecuredOvernightFinancingRateSofrMember |
Letters of credit and surety bonds |  |
Debt Instrument [Line Items] |  |
Letters of credit and surety bonds outstanding with various banks and surety institutions | $ 49,100 | $ 47,100
Letters of credit |  |
Debt Instrument [Line Items] |  |
Amount outstanding | 25,000 |
Unsecured debt payable to U.S. Treasury |  |
Debt Instrument [Line Items] |  |
Total long-term debt, net of debt issue costs | 200,600 |
Unsecured debt payable to U.S. Treasury at fixed annual interest rate |  |
Debt Instrument [Line Items] |  |
Total long-term debt, net of debt issue costs | $ 138,600 |
Interest rate (as a percent) | 1.00% |
Basis spread on variable rate | 2.00% |
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:SecuredOvernightFinancingRateSofrMember |
Unsecured debt payable to U.S. Treasury at variable interest rate |  |
Debt Instrument [Line Items] |  |
Total long-term debt, net of debt issue costs | $ 62,000 |
Basis spread on variable rate | 2.00% |
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] | us-gaap:SecuredOvernightFinancingRateSofrMember |
Primarily related to acquisition of aircraft and certain spare engines |  |
Debt Instrument [Line Items] |  |
Total long-term debt (including current portion) | $ 2,500,000 |
Total long-term debt, net of debt issue costs | 2,300,000 |
Line of credit |  |
Debt Instrument [Line Items] |  |
Maximum borrowing capacity | 100,000 |
Amount outstanding | 0 |
Current borrowing capacity | $ 75,000 |
Basis spread on variable rate | 3.50% |
E175 |  |
Debt Instrument [Line Items] |  |
Number of aircraft delivered | aircraft | 2 |
Purchase of aircraft financed through long-term debt | $ 47,100 |
Debt instrument, term | 12 years |

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