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Fair Value Measurements (Tables) | 3 Months Ended
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Mar. 31, 2024
Fair Value Disclosures [Abstract] |
Schedule of Fair Values of Financial Instruments and Nonfinancial Assets and Liabilities Measured at the Reporting Date | The fair values of these financial instruments are summarized as follows:
|  |  |  | Fair Value at |
|  | Fair Value Hierarchy Levels |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  | March 31, 2024 |  |  | December 31, 2023 |
|  |  |  | Assets |  |  | Liabilities |  |  | Assets |  |  | Liabilities |
Derivatives designated as cash flow hedging instruments: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fuel hedge contracts |  | 2 |  | $ | — |  |  | $ | 390 |  |  | $ | — |  |  | $ | 2,918 |
Foreign currency exchange hedge contracts |  | 2 |  |  | — |  |  |  | 131 |  |  |  | 358 |  |  |  | — |
Total derivatives |  |  |  | $ | — |  |  | $ | 521 |  |  | $ | 358 |  |  | $ | 2,918 |
Changes in Components of Accumulated Other Comprehensive Income (Loss) | Changes in the components of the accumulated balances of other comprehensive income (loss) are as follows:
|  | Three Months Ended |
|  | March 31, |
|  | 2024 |  |  | 2023 |
Derivatives: |  |  |  |  |  |
Fuel Hedge Contracts |  |  |  |  |  |
Reclassification of derivative (gains) losses to earnings—net of tax |  |  | (122 | ) |  | $ | 370 |
Change in fair value of derivatives—net of tax |  |  | 2,011 |  |  |  | (1,906 | )
Net change in cash flow derivative fuel hedges—net of tax |  | $ | 1,889 |  |  | $ | (1,536 | )
Foreign Currency Exchange Hedge Contracts |  |  |  |  |  |
Reclassification of derivative gains to earnings—net of tax |  | $ | 36 |  |  | $ | (42 | )
Change in fair value of derivatives—net of tax |  |  | (637 | ) |  |  | 169 |
Net change in cash flow derivative foreign currency hedges—net of tax |  | $ | (601 | ) |  | $ | 127 |
Total net change in cash flow derivative hedges - net of tax |  | $ | 1,288 |  |  | $ | (1,409 | )
Adjustments Reclassified from Accumulated Balances Other Comprehensive Income (Loss) to Earnings | Adjustments reclassified from accumulated balances of other comprehensive income (loss) to earnings are as follows:
|  |  |  | Three Months Ended |
|  |  |  | March 31, |
|  | Statement of Operations Location |  | 2024 |  |  | 2023 |
Derivatives: |  |  |  |  |  |  |  |
Fuel hedge contracts |  | Costs of contract revenues |  | $ | (163 | ) |  | $ | 495 |
Foreign currency exchange hedge contracts |  | Other expense (income) |  |  | 49 |  |  |  | (52 | )
|  | Income tax (provision) benefit |  |  | (29 | ) |  |  | 112 |
|  |  |  | $ | (85 | ) |  | $ | 331 |

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