v3.24.3
Debt - Senior Notes (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 13, 2024
Feb. 27, 2024
Feb. 12, 2024
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2022
Debt Instruments            
Proceeds from issuance of long-term debt       $ 1,541,458 $ 1,289,622 $ 520,003
Loss on extinguishment of debt from write-off of unamortized deferred financing costs       $ (3,734) $ (2,395) $ (16,439)
Senior notes due December 2025            
Debt Instruments            
Debt instrument, face amount     $ 680,000      
Interest rate   5.625%        
Repayments of outstanding principal balance of senior debt   $ 680,000        
Debt instrument, redemption price, percentage     100.00%      
Loss on extinguishment of debt from write-off of unamortized deferred financing costs $ (2,000)          
Senior notes due Dec. 2032            
Debt Instruments            
Interest rate   6.75%   6.75%    
Proceeds from issuance of long-term debt   $ 594,000        
Debt, interest rate terms       Interest is paid semi-annually during our second and fourth fiscal quarters.    
Debt instrument maturity date, description       The 2032 Senior Notes mature on April 1, 2032.    
Debt instrument, maturity date       Apr. 01, 2032    
Debt intrument call feature       The 2032 Senior Notes are prepayable beginning March 1, 2027, at a price of 103.375, at a price of 101.688 after March 1, 2028, and at par after March 1, 2029.    
Debt issuance costs   $ 8,500        
Senior notes due Dec. 2032 | Debt instrument Redemption beginning March1, 2027            
Debt Instruments            
Conversion price       $ 103.375    
Senior notes due Dec. 2032 | Debt instrument Redemption beginning March1, 2028            
Debt Instruments            
Conversion price       $ 101.688