Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements and Derivatives - Derivatives Measured at Fair Value and Disclosed by Balance Sheet Location (Details)

v3.21.1
Fair Value Measurements and Derivatives - Derivatives Measured at Fair Value and Disclosed by Balance Sheet Location (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value $ 25,015 $ 49,029
Derivative liabilities, fair value 148,763 142,130
Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 28,152 55,850
Derivative liabilities, fair value 132,485 131,864
Derivatives not Designated as Hedging Instruments    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 5,424 546
Derivative liabilities, fair value 17,373 10,266
Fuel contracts | Designated as Hedging Instrument | Prepaid expenses and other assets    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 165  
Derivative liabilities, fair value 242  
Fuel contracts | Designated as Hedging Instrument | Other long-term assets    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 1,286  
Derivative liabilities, fair value 463  
Fuel contracts | Designated as Hedging Instrument | Accrued expenses and other liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 192  
Derivative liabilities, fair value 528 35,973
Fuel contracts | Designated as Hedging Instrument | Other long-term liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 1,976  
Derivative liabilities, fair value 3,867 28,947
Fuel contracts | Derivatives not Designated as Hedging Instruments | Prepaid expenses and other assets    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 599  
Fuel contracts | Derivatives not Designated as Hedging Instruments | Other long-term assets    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 240  
Derivative liabilities, fair value 390  
Fuel contracts | Derivatives not Designated as Hedging Instruments | Accrued expenses and other liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 4,550 546
Derivative liabilities, fair value 16,968 6,732
Fuel contracts | Derivatives not Designated as Hedging Instruments | Other long-term liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 35  
Derivative liabilities, fair value 15 3,534
Foreign currency contracts | Designated as Hedging Instrument | Prepaid expenses and other assets    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 1,394 5,779
Foreign currency contracts | Designated as Hedging Instrument | Other long-term assets    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 21,331 43,250
Foreign currency contracts | Designated as Hedging Instrument | Accrued expenses and other liabilities    
Derivatives, Fair Value [Line Items]    
Derivative liabilities, fair value 18,431 14,778
Foreign currency contracts | Designated as Hedging Instrument | Other long-term liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 1,808 6,821
Derivative liabilities, fair value 104,333 44,938
Interest rate contracts | Designated as Hedging Instrument | Accrued expenses and other liabilities    
Derivatives, Fair Value [Line Items]    
Derivative liabilities, fair value 4,621 6,776
Interest rate contracts | Designated as Hedging Instrument | Other long-term liabilities    
Derivatives, Fair Value [Line Items]    
Derivative liabilities, fair value   452
Total derivatives    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 33,576 56,396
Derivative liabilities, fair value $ 149,858 $ 142,130