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)

v3.20.2
Fair Value Measurements and Derivatives - Derivatives Measured at Fair Value and Disclosed by Balance Sheet Location (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value $ 26,321 $ 277
Derivative liabilities, fair value 266,534 192,034
Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 28,409 3,429
Derivative liabilities, fair value 250,257 192,034
Derivatives not designated as hedging instruments    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 10 0
Derivative liabilities, fair value 16,277 0
Fuel contracts | Designated as Hedging Instrument | Other long-term assets    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 0 277
Derivative liabilities, fair value 0 0
Fuel contracts | Designated as Hedging Instrument | Accrued expenses and other liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 0 2,300
Derivative liabilities, fair value 55,937 18,257
Fuel contracts | Designated as Hedging Instrument | Other long-term liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 0 683
Derivative liabilities, fair value 64,509 17,763
Fuel contracts | Derivatives not designated as hedging instruments | Accrued expenses and other liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 10 0
Derivative liabilities, fair value 16,265 0
Fuel contracts | Derivatives not designated as hedging instruments | Other long-term liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 0 0
Derivative liabilities, fair value 12 0
Foreign currency contracts | Designated as Hedging Instrument | Prepaid expenses and other assets    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 1,522 0
Derivative liabilities, fair value 0 0
Foreign currency contracts | Designated as Hedging Instrument | Other long-term assets    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 24,799 0
Derivative liabilities, fair value 0 0
Foreign currency contracts | Designated as Hedging Instrument | Accrued expenses and other liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 0 0
Derivative liabilities, fair value 17,868 33,475
Foreign currency contracts | Designated as Hedging Instrument | Other long-term liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 2,088 169
Derivative liabilities, fair value 102,522 118,500
Interest rate swap | Designated as Hedging Instrument | Accrued expenses and other liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 0 0
Derivative liabilities, fair value 8,188 2,178
Interest rate swap | Designated as Hedging Instrument | Other long-term liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 0 0
Derivative liabilities, fair value 1,233 1,861
Total derivatives    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 28,419 3,429
Derivative liabilities, fair value $ 266,534 $ 192,034