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Fair Value Measurements (Changes in Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Derivatives Fair Value [Line Items]        
Net change in cash flow derivative hedges—net of tax [1] $ 50 $ 978 $ 1,338 $ (431)
Fuel Hedge Contracts [Member]        
Derivatives Fair Value [Line Items]        
Reclassification of derivative losses (gains) to earnings - net of tax 359 1,434 238 1,804
Change in fair value of derivatives—net of tax (310) (252) 1,700 (2,158)
Net change in cash flow derivative hedges—net of tax 49 1,182 1,938 (354)
Foreign Currency Exchange Hedge Contracts [Member]        
Derivatives Fair Value [Line Items]        
Reclassification of derivative losses (gains) to earnings - net of tax 6 (279) 42 (321)
Change in fair value of derivatives—net of tax (5) 75 (642) 244
Net change in cash flow derivative hedges—net of tax $ 1 $ (204) $ (600) $ (77)
[1] Net of income tax provision of $(17) and $(331) for the three months ended June 30, 2024 and 2023, respectively. Net of income tax (provision) benefit of $(453) and $145 for the six months ended June 30, 2024 and 2023, respectively.