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Leases - Right of use assets (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of quantitative information about right-of-use assets [line items]      
Beginning balance $ 309,303 $ 281,146 $ 234,380
Additions 53,341 116,903 122,707
Derecognition   (20,271)  
Depreciation expense (65,883) (68,475) (75,941)
Ending balance 296,761 309,303 281,146
Aircraft      
Disclosure of quantitative information about right-of-use assets [line items]      
Beginning balance 276,916 260,911 210,786
Additions 41,760 98,603 120,747
Derecognition   (20,271)  
Depreciation expense (59,437) (62,327) (70,622)
Ending balance 259,239 276,916 260,911
Real estate      
Disclosure of quantitative information about right-of-use assets [line items]      
Beginning balance 32,387 20,235 23,594
Additions 11,581 18,300 1,960
Derecognition   0  
Depreciation expense (6,446) (6,148) (5,319)
Ending balance $ 37,522 $ 32,387 $ 20,235