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Fair Value Measurements (Changes in Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Derivatives Fair Value [Line Items] |  |  |  |
Net change in cash flow derivative hedges-net of tax | [1] | $ 1,050 | $ (1,824) | $ (331)
Total other comprehensive income (loss) |  | 1,050 | (1,824) | (331)
Fuel Hedge Contracts [Member] |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Reclassification of derivative losses (gains) to earnings - net of tax |  | 1,593 | 861 | (10,629)
Change in fair value of derivatives—net of tax |  | (208) | (2,565) | 9,681
Net change in cash flow derivative hedges-net of tax |  | 1,385 | (1,704) | (948)
Foreign Currency Exchange Hedge Contracts [Member] |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Reclassification of derivative losses (gains) to earnings - net of tax |  | 208 | (400) | 116
Change in fair value of derivatives—net of tax |  | (705) | 280 | 501
Net change in cash flow derivative hedges-net of tax |  | (497) | $ (120) | $ 617
Interest Rate Swaps [Member] |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Reclassification of derivative losses (gains) to earnings - net of tax |  | (233) |  |
Change in fair value of derivatives—net of tax |  | 395 |  |
Net change in cash flow derivative hedges-net of tax |  | $ 162 |  |
[1] | Net of income tax provision of $355 for the year ended December 31, 2024, and net of income tax benefit of $616 and $112 for the years ended December 31, 2023 and 2022, respectively.

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