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Leases - Right of use assets (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of quantitative information about right-of-use assets [line items]      
Beginning balance $ 234,380 $ 166,328 $ 214,279
Additions 122,707 142,191 30,242
Depreciation expense (75,941) (74,139) (78,193)
Ending balance 281,146 234,380 166,328
Aircraft      
Disclosure of quantitative information about right-of-use assets [line items]      
Beginning balance 210,786 147,831 192,361
Additions 120,747 132,122 29,157
Depreciation expense (70,622) (69,167) (73,687)
Ending balance 260,911 210,786 147,831
Real estate      
Disclosure of quantitative information about right-of-use assets [line items]      
Beginning balance 23,594 18,497 21,918
Additions 1,960 10,069 1,085
Depreciation expense (5,319) (4,972) (4,506)
Ending balance $ 20,235 $ 23,594 $ 18,497