Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Fair Value Measurements and Derivatives - Effects of Derivatives Designated as Cash Flow Hedges (Details) - Cash Flow Hedging - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Other Comprehensive Income $ 54,478 $ (17,189) $ (251,382) $ (2,037)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (28,782) 9,274 (50,781) 16,274
Fuel contracts | Fuel        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Other Comprehensive Income 27,769 (16,577) (170,708) 79,931
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (13,878) 9,885 (20,095) 17,403
Fuel contracts | Other income (expense), net        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (11,964)   (26,284)  
Foreign currency contracts | Depreciation and amortization        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Other Comprehensive Income 27,694 4,181 (70,193) (76,097)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (1,266) (703) (2,395) (1,406)
Interest rate swap | Interest expense, net        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Other Comprehensive Income (985) (4,793) (10,481) (5,871)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income $ (1,674) $ 92 $ (2,007) $ 277