v3.24.3
Debt - Convertible Notes and the Indenture (Details)
1 Months Ended 3 Months Ended
May 31, 2024
USD ($)
period
$ / shares
Feb. 28, 2021
USD ($)
period
$ / shares
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Jun. 30, 2024
Convertible senior notes          
Line of Credit Facility [Line Items]          
Cash interest expense     $ 4,800,000    
5.50% Convertible Senior Notes Due 2029          
Line of Credit Facility [Line Items]          
Interest expense     $ 5,100,000    
5.50% Convertible Senior Notes Due 2029 | Convertible senior notes          
Line of Credit Facility [Line Items]          
Principal amount $ 350,000,000.0        
Convertible debt, stated interest rate 5.50%   5.50%   5.50%
Value of shares available for exercise $ 50,000,000.0        
Proceeds from issuance of convertible notes, net of issuance costs 342,300,000        
Purchasers' discounts and commissions $ 7,700,000        
Debt instrument, leverage ratio 0.218436        
Debt instrument, conversion price (in dollars per share) | $ / shares $ 4.58 $ 4.58      
Redemption price percentage 100.00%        
Effective interest rate     5.97%    
5.50% Convertible Senior Notes Due 2029 | Convertible senior notes | Debt Conversion Terms One          
Line of Credit Facility [Line Items]          
Threshold percentage of stock price trigger 130.00%        
Threshold of trading days | period 20        
Threshold of consecutive trading days | period 30        
0% Convertible Senior Notes Due February 15, 2026          
Line of Credit Facility [Line Items]          
Convertible debt, stated interest rate   0.00%      
Interest expense     $ 200,000 $ 1,100,000  
0% Convertible Senior Notes Due February 15, 2026 | Convertible senior notes          
Line of Credit Facility [Line Items]          
Principal amount   $ 1,000,000,000.0      
Convertible debt, stated interest rate     0.00%   0.00%
Value of shares available for exercise   $ 125,000,000.0      
Proceeds from issuance of convertible notes, net of issuance costs $ 801,000,000        
Debt instrument, leverage ratio   0.00418      
Debt instrument, conversion price (in dollars per share) | $ / shares   $ 239.23      
Redemption price percentage   100.00%      
Effective interest rate     0.45%    
Debt instrument aggregate cash 724,900,000        
Debt extinguishment 69,800,000        
Net gain on debt refinancing $ 6,300,000        
0% Convertible Senior Notes Due February 15, 2026 | Convertible senior notes | Debt Conversion Terms One          
Line of Credit Facility [Line Items]          
Threshold percentage of stock price trigger   130.00%      
Threshold of trading days | period   20      
Threshold of consecutive trading days | period   30