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Borrowings - Convertible Senior Notes Due 2029 (Details)
1 Months Ended 3 Months Ended
Jul. 19, 2024
USD ($)
D
$ / shares
Jul. 31, 2024
USD ($)
Sep. 30, 2025
USD ($)
$ / shares
Sep. 30, 2024
USD ($)
BORROWINGS        
Proceeds from long-term debt     $ 100,057,000 $ 340,475,000
Amortization of debt discount and issuance costs     450,000 354,000
Convertible Senior Notes Due 2029        
BORROWINGS        
Principal amount     $ 350,000,000  
Interest rate (as a percentage)     2.25%  
Conversion price | $ / shares     $ 191.98  
Total interest expense     $ 2,400,000 1,900,000
Interest expense debt excluding amortization     2,000,000 1,600,000
Amortization of debt discount and issuance costs     $ 400,000 $ 300,000
Convertible Senior Notes Due 2029        
BORROWINGS        
Principal amount   $ 350,000,000    
Interest rate (as a percentage) 2.25% 2.25%    
Percentage of principal amount   97.50%    
Proceeds from long-term debt $ 340,400,000      
Conversion rate 5.209      
Debt instrument per principal amount $ 1,000      
Debt instrument price percentage 100.00%      
Percentage of principal amount redeemed 100.00%      
Threshold percentage of stock price 130.00%      
Number of consecutive trading days | D 20      
Conversion price | $ / shares $ 191.98      
Convertible Senior Notes Due 2029 | Calendar quarter commencing after quarter ended on September 30, 2024        
BORROWINGS        
Conversion price trading days | D 20      
Threshold percentage of stock price 130.00%      
Number of consecutive trading days | D 30      
Convertible Senior Notes Due 2029 | Five consecutive business days after specified period        
BORROWINGS        
Threshold percentage of stock price 98.00%      
Number of consecutive trading days | D 10