Annual report pursuant to Section 13 and 15(d)

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

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Fair Value Measurements and Derivatives - Derivatives Measured at Fair Value and Disclosed by Balance Sheet Location (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value   $ 60,794
Derivative liabilities, fair value $ 21,490 177,746
Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 4,446 65,096
Derivative liabilities, fair value 20,179 185,538
Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 141 84
Derivative liabilities, fair value 1,311 539
Fuel contracts | Designated as Hedging Instrument | Prepaid expenses and other assets    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value   53,224
Derivative liabilities, fair value   7,137
Fuel contracts | Designated as Hedging Instrument | Other long-term assets    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value   3,869
Derivative liabilities, fair value   655
Fuel contracts | Designated as Hedging Instrument | Accrued expenses and other liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 4,309  
Derivative liabilities, fair value 11,247  
Fuel contracts | Designated as Hedging Instrument | Other long-term liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 137  
Derivative liabilities, fair value 8,932  
Fuel contracts | Not Designated as Hedging Instrument | Prepaid expenses and other assets    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value   84
Derivative liabilities, fair value   348
Fuel contracts | Not Designated as Hedging Instrument | Other long-term assets    
Derivatives, Fair Value [Line Items]    
Derivative liabilities, fair value   191
Fuel contracts | Not Designated as Hedging Instrument | Accrued expenses and other liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 141  
Derivative liabilities, fair value 1,031  
Fuel contracts | Not Designated as Hedging Instrument | Other long-term liabilities    
Derivatives, Fair Value [Line Items]    
Derivative liabilities, fair value 280  
Foreign currency contracts | Designated as Hedging Instrument | Prepaid expenses and other assets    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value   3,617
Foreign currency contracts | Designated as Hedging Instrument | Accrued expenses and other liabilities    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value   4,386
Derivative liabilities, fair value   177,746
Total derivatives    
Derivatives, Fair Value [Line Items]    
Derivative assets, fair value 4,587 65,180
Derivative liabilities, fair value $ 21,490 $ 186,077