v3.26.3
Investments in Other Companies (Details)
$ in Thousands, shares in Millions
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jul. 31, 2026
item
Jan. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
shares
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
shares
Aug. 31, 2026
USD ($)
Investments in other companies                  
Long-term debt       $ 2,364,860   $ 2,364,860   $ 2,392,084  
Financing receivable                 $ 25,000
Estimated fair value                 21,500
Period between issuance and maturity           10 years      
Long-term receivables and other assets       353,940   $ 353,940   370,144  
Other long-term assets                  
Investments in other companies                  
Note receivable related to the sale       $ 21,100   21,100      
Aero Engines, LLC. ("Aero Engines")                  
Investments in other companies                  
Payments to acquire interest in joint venture           $ 26,600      
Investment ownership (as a percent)       75.00%   75.00%      
Long-term debt       $ 0   $ 0      
Distribution received from investment           5,500   12,000  
Aero Engines, LLC. ("Aero Engines") | Other Assets                  
Investments in other companies                  
Investment balance in other companies       9,400   9,400   $ 12,800  
Aero Engines, LLC. ("Aero Engines") | Other income (expense), net                  
Investments in other companies                  
Company's portion of income (loss) generated by other companies       700 $ 500 2,000 $ 600    
Contour Airlines                  
Investments in other companies                  
Investment ownership (as a percent) 25.00%   9.90%            
Investment balance in other companies                 $ 20,200
Payments to acquire equity method investment   $ 15,100 $ 9,900            
Number of board of directors seats held | item 1                
Total number of board of directors seats | item 5                
Percentage of board of directors seats held 20.00%                
Contour Airlines | Other income (expense), net                  
Investments in other companies                  
Company's portion of income (loss) generated by other companies       300 700 $ 1,300 1,400    
Eve Holding, Inc                  
Investments in other companies                  
Number of shares held | shares           1.1   1.1  
Eve Holding, Inc | Other Assets                  
Investments in other companies                  
Investment balance in other companies       2,100   $ 2,100   $ 4,300  
Eve Holding, Inc | Other income (expense), net                  
Investments in other companies                  
Unrealized loss       $ 600 $ 4,500 $ 2,200 $ 2,400