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Leases - Right of use assets (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of quantitative information about right-of-use assets [line items]      
Beginning balance $ 281,146 $ 234,380 $ 166,328
Additions 116,903 122,707 142,191
Derecognition (20,271)    
Depreciation expense (68,475) (75,941) (74,139)
Ending balance 309,303 281,146 234,380
Aircraft      
Disclosure of quantitative information about right-of-use assets [line items]      
Beginning balance 260,911 210,786 147,831
Additions 98,603 120,747 132,122
Derecognition (20,271)    
Depreciation expense (62,327) (70,622) (69,167)
Ending balance 276,916 260,911 210,786
Real estate      
Disclosure of quantitative information about right-of-use assets [line items]      
Beginning balance 20,235 23,594 18,497
Additions 18,300 1,960 10,069
Derecognition 0    
Depreciation expense (6,148) (5,319) (4,972)
Ending balance $ 32,387 $ 20,235 $ 23,594