Annual report pursuant to Section 13 and 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
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Recognized in Other Comprehensive Income $ (110,379) $ (51,642) $ (123,015)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (65,017) (106,670) 8,898
Cash Flow Hedging      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Recognized in Other Comprehensive Income (110,379) (51,642) (123,015)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (65,017) (106,670) 8,898
Cash Flow Hedging | Fuel      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (41,080) (45,488) 14,093
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 (5,067) (4,929) (3,062)
Cash Flow Hedging | Interest expense, net      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (6,868) (6,600) (2,133)
Cash Flow Hedging | Fuel contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Recognized in Other Comprehensive Income 74,434 (157,669) 46,154
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (12,002) (49,653)  
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 (41,080) (45,488)  
Cash Flow Hedging | Foreign currency contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Recognized in Other Comprehensive Income (185,067) 116,496 (163,197)
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 (5,067) (4,929)  
Cash Flow Hedging | Interest rate contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Recognized in Other Comprehensive Income 254 (10,469) $ (5,972)
Cash Flow Hedging | Interest rate contracts | Interest expense, net      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income $ (6,868) $ (6,600)