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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2023
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 |  | December 31, 2023 |  |  | December 31, 2022 |
|  | Levels |  | Assets |  |  | Liabilities |  |  | Assets |  |  | Liabilities |
Derivatives designated as cash flow hedging instruments: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fuel hedge contracts |  | 2 |  | $ | — |  |  | $ | 2,918 |  |  | $ | — |  |  | $ | 638 |
Foreign currency exchange hedge contracts |  | 2 |  |  | 358 |  |  |  | — |  |  |  | 831 |  |  |  | 6 |
Total derivatives |  |  |  | $ | 358 |  |  | $ | 2,918 |  |  | $ | 831 |  |  | $ | 644 |
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:
|  | 2023 |  |  | 2022 |  |  | 2021 |
Derivatives: |  |  |  |  |  |  |  |  |
Fuel Hedge Contracts |  |  |  |  |  |  |  |  |  |  |
Reclassification of derivative (gains) losses to earnings—net of tax |  | $ | 861 |  |  | $ | (10,629 | ) |  | $ | (6,481 | )
Change in fair value of derivatives—net of tax |  |  | (2,565 | ) |  |  | 9,681 |  |  |  | 5,653 |
Net change in cash flow derivative fuel hedges—net of tax |  | $ | (1,704 | ) |  | $ | (948 | ) |  | $ | (828 | )
Foreign Currency Exchange Hedge Contracts |  |  |  |  |  |  |  |  |  |  |
Reclassification of derivative (gains) losses to earnings—net of tax |  | $ | (400 | ) |  | $ | 116 |  |  | $ | — |
Change in fair value of derivatives—net of tax |  |  | 280 |  |  |  | 501 |  |  |  | — |
Net change in cash flow derivative foreign currency hedges—net of tax |  |  | (120 | ) |  |  | 617 |  |  |  | — |
Total net change in cash flow derivative hedges—net of tax |  | $ | (1,824 | ) |  | $ | (331 | ) |  | $ | (828 | )
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:
|  | Statements of operations location |  | 2023 |  |  | 2022 |  |  | 2021 |
Derivatives: |  |  |  |  |  |  |  |  |  |  |
|  | Costs of contract revenues |  | $ | 1,152 |  |  | $ | (14,219 | ) |  | $ | (8,670 | )
|  | Income tax (provision) benefit |  |  | 291 |  |  |  | (3,590 | ) |  |  | (2,189 | )
|  |  |  | $ | 861 |  |  | $ | (10,629 | ) |  | $ | (6,481 | )

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