Annual report [Section 13 and 15(d), not S-K Item 405]

Fair Value Measurements and Derivatives - Effects of Derivatives Designated as Cash Flow Hedges (Details)

v3.25.4
Fair Value Measurements and Derivatives - Effects of Derivatives Designated as Cash Flow Hedges (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) $ (33,408) $ (4,923) $ 26,173
Cash Flow Hedging [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Recognized in Other Comprehensive Loss 23,232 (10,642) (1,773)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) (33,408) (4,923) 26,173
Cash Flow Hedging [Member] | Fuel      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) (15,531) 12,321 39,138
Cash Flow Hedging [Member] | Depreciation and amortization      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) (16,475) (16,478) (12,819)
Cash Flow Hedging [Member] | Fuel contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Recognized in Other Comprehensive Loss (29,823) 9,482 (15,144)
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) (1,402) (766) (146)
Cash Flow Hedging [Member] | Fuel contracts | Fuel      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) (15,531) 12,321 39,138
Cash Flow Hedging [Member] | Foreign Exchange Forward [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Recognized in Other Comprehensive Loss 53,055 (20,124) 13,371
Cash Flow Hedging [Member] | Foreign Exchange Forward [Member] | Depreciation and amortization      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Expense) $ (16,475) $ (16,478) $ (12,819)