Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements and Derivatives - Effects of derivatives designated as cash flow hedges (Details)

v3.19.3
Fair Value Measurements and Derivatives - Effects of derivatives designated as cash flow hedges (Details) - Cash Flow Hedging - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Other Comprehensive Income $ (209,511) $ 15,365 $ (211,548) $ 48,047
Amount of gain or (loss) reclassified from accumulated other comprehensive income (loss) into income 448 10,706 16,722 19,214
Fuel contracts | Fuel        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Other Comprehensive Income (65,726) 24,439 14,205 88,935
Amount of gain or (loss) reclassified from accumulated other comprehensive income (loss) into income 1,657 11,595 19,060 23,024
Foreign currency contracts | Depreciation and amortization expense        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Other Comprehensive Income (142,627) (10,062) (218,724) (43,951)
Amount of gain or (loss) reclassified from accumulated other comprehensive income (loss) into income (703) (703) (2,108) (2,761)
Interest rate contracts | Interest expense, net        
Derivative Instruments, Gain (Loss) [Line Items]        
Amount of Gain (Loss) Recognized in Other Comprehensive Income (1,158) 988 (7,029) 3,063
Amount of gain or (loss) reclassified from accumulated other comprehensive income (loss) into income $ (506) $ (186) $ (230) $ (1,049)