Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements and Derivatives - Effects of Derivatives Designated as Cash Flow Hedges (Details)

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Fair Value Measurements and Derivatives - Effects of Derivatives Designated as Cash Flow Hedges (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income $ 3,150 $ (2,547) $ 6,483 $ 7,327
Cash Flow Hedging        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income 3,150 (2,547) 6,483 7,327
Cash Flow Hedging | Fuel        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income 6,838 572 13,415 13,169
Cash Flow Hedging | Other income (expense), net        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income 432 (306) 1,307 (343)
Cash Flow Hedging | Depreciation and amortization        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income $ (4,120) $ (2,813) (8,239) (5,499)
Cash Flow Hedging | Fuel contracts | Fuel        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income     13,415 13,169
Cash Flow Hedging | Foreign currency contracts | Depreciation and amortization        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income     $ (8,239) $ (5,499)