Fair Value Measurements and Derivative Instruments (Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Asset Derivatives
Asset Derivatives	$ 69,808	$ 108,539
Liability Derivatives
Liability Derivatives	200,541	259,705
Designated as Hedging Instrument
Asset Derivatives
Asset Derivatives	61,276	107,705
Liability Derivatives
Liability Derivatives	196,066	240,573
Not Designated as Hedging Instrument
Asset Derivatives
Asset Derivatives	8,532	834
Liability Derivatives
Liability Derivatives	4,475	19,132
Interest rate swaps | Designated as Hedging Instrument | Other Assets
Asset Derivatives
Asset Derivatives	0	17,271
Interest rate swaps | Designated as Hedging Instrument | Derivative Financial Instruments
Asset Derivatives
Asset Derivatives	6,478	261
Liability Derivatives
Liability Derivatives	0	0
Interest rate swaps | Designated as Hedging Instrument | Other long-term Liabilities
Liability Derivatives
Liability Derivatives	62,080	144,653
Foreign currency forward contracts | Designated as Hedging Instrument | Other Assets
Asset Derivatives
Asset Derivatives	2,070	20,836
Foreign currency forward contracts | Designated as Hedging Instrument | Derivative Financial Instruments
Asset Derivatives
Asset Derivatives	7,357	63,894
Liability Derivatives
Liability Derivatives	116,027	13,294
Foreign currency forward contracts | Designated as Hedging Instrument | Other long-term Liabilities
Liability Derivatives
Liability Derivatives	8,813	7,306
Foreign currency forward contracts | Not Designated as Hedging Instrument | Other Assets
Asset Derivatives
Asset Derivatives	0	0
Foreign currency forward contracts | Not Designated as Hedging Instrument | Derivative Financial Instruments
Asset Derivatives
Asset Derivatives	0	0
Liability Derivatives
Liability Derivatives	0	160
Foreign currency forward contracts | Not Designated as Hedging Instrument | Other long-term Liabilities
Liability Derivatives
Liability Derivatives	0	0
Fuel swaps | Designated as Hedging Instrument | Other Assets
Asset Derivatives
Asset Derivatives	13,452	350
Fuel swaps | Designated as Hedging Instrument | Derivative Financial Instruments
Asset Derivatives
Asset Derivatives	31,919	5,093
Liability Derivatives
Liability Derivatives	7,944	25,203
Fuel swaps | Designated as Hedging Instrument | Other long-term Liabilities
Liability Derivatives
Liability Derivatives	1,202	50,117
Fuel swaps | Not Designated as Hedging Instrument | Other Assets
Asset Derivatives
Asset Derivatives	102	0
Fuel swaps | Not Designated as Hedging Instrument | Derivative Financial Instruments
Asset Derivatives
Asset Derivatives	8,430	834
Liability Derivatives
Liability Derivatives	3,264	18,028
Fuel swaps | Not Designated as Hedging Instrument | Other long-term Liabilities
Liability Derivatives
Liability Derivatives	$ 1,211	$ 944