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Fair Value Measurements (Changes in Components of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Thousands
 12 Months Ended
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.