Fair Value Measurements and Derivative Instruments - Designated Cash Flow Hedges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) on Derivative	$ 49,248	$ (268,478)	$ (172,323)	$ (271,726)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	(16,887)	(3,253)	(62,184)	16,389
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net [Abstract]
Net inception fair value at January 1, 2020					$ (8,008)
Amount of gain recognized in income on derivatives for the period ended September 30, 2020			4,946
Amount of gain (loss) remaining to be amortized in accumulated other comprehensive loss, as of September 30, 2020			561
Fair value at September 30, 2020	(2,501)		(2,501)
Interest rate swaps
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) on Derivative	(42,488)	(23,488)	(90,677)	(91,949)
Interest rate swaps | Interest expense, net of interest capitalized
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	(6,532)	(373)	(15,939)	(1,173)
Foreign currency forward contracts
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) on Derivative	96,821	(131,523)	39,161	(202,273)
Foreign currency forward contracts | Depreciation and amortization expenses
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	(3,782)	(3,592)	(10,899)	(10,471)
Foreign currency forward contracts
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) on Derivative	0	0	0	0
Foreign currency forward contracts | Other income (expense)
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	(1,511)	(1,251)	(5,855)	(3,866)
Fuel swaps
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) on Derivative	0	0	0	0
Fuel swaps | Other income (expense)
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	536	(472)	3,029	(1,916)
Fuel swaps | Fuel
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	(5,598)	2,435	(32,520)	33,815
Fuel swaps
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Loss) on Derivative	(5,085)	(113,467)	(120,807)	22,496
Fuel swaps | Fuel
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income	$ (5,598)	$ 2,435	$ (32,520)	$ 33,815