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Fair Value Measurements (Changes in Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Reclassification of derivative losses (gains) to earnings - net of tax $ 370  
Net change in cash flow derivative hedges—net of tax [1] (1,409) $ 6,235
Total other comprehensive income (loss) (1,409) 6,235
Fuel Hedge Contracts [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Reclassification of derivative losses (gains) to earnings - net of tax 370 (2,481)
Change in fair value of derivatives—net of tax (1,906) 8,716
Net change in cash flow derivative hedges—net of tax (1,536) $ 6,235
Foreign Currency Exchange Hedge Contracts [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Reclassification of derivative losses (gains) to earnings - net of tax (42)  
Change in fair value of derivatives—net of tax 169  
Net change in cash flow derivative hedges—net of tax $ 127  
[1] Net of income tax (provision) benefit of $476 and $(2,106) for the three months ended March 31, 2023 and 2022, respectively.