v3.25.2
Borrowings - 2027 Notes (Narrative) (Details) - USD ($)
$ in Thousands
Aug. 03, 2021
Jun. 30, 2025
Sep. 30, 2024
Debt Instrument [Line Items]      
Long-term debt   $ 5,127,148 $ 4,599,430
2027 Notes      
Debt Instrument [Line Items]      
Debt instrument, face amount $ 350,000    
Long-term debt   $ 350,000 $ 350,000
Interest rate 2.05%    
Debt instrument, redemption price, percentage 100.00%    
Debt instrument, basis spread on variable rate 0.25%