Fair Value Measurements and Derivative Instruments - Designated Cash Flow Hedges (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Loss on Derivatives	$ 43,175	$ 101,415	$ 42,247	$ (221,571)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	(8,302)	(22,917)	(19,531)	(45,297)
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net [Abstract]
Net inception fair value at January 1, 2021					$ (1,915)
Amount of gain recognized in income on derivatives for the six month period ended June 30, 2021			3,293
Amount of gain (loss) remaining to be amortized in accumulated other comprehensive loss, as of June 30, 2021			(2,034)
Fair value at June 30, 2021	(656)		(656)
Interest rate swaps
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Loss on Derivatives	(15,714)	4,406	27,694	(48,189)
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 Loss into Income	(11,448)	(6,016)	(20,957)	(9,407)
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 Loss on Derivatives	(2,574)	42,354	(102,155)	(57,660)
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 Loss into Income	(3,855)	(3,780)	(7,636)	(7,117)
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 Loss on Derivatives	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 Loss into Income	(515)	(2,581)	(1,806)	(4,344)
Fuel swaps
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Loss on Derivatives	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 Loss into Income	(7)	2,149	(414)	2,493
Fuel swaps | Fuel
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	7,523	(12,689)	11,282	(26,922)
Fuel Swap
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Loss on Derivatives	61,463	54,655	116,708	(115,722)
Fuel Swap | Fuel
Effect of derivative instruments involved in hedging on the consolidated financial statements
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income	$ 7,523	$ (12,689)	$ 11,282	$ (26,922)