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DEBT - Convertible senior notes and capped calls (Details)
1 Months Ended 9 Months Ended 19 Months Ended
Feb. 29, 2020
USD ($)
day
$ / shares
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2024
day
Debt Instrument [Line Items]        
Gain (loss) on repurchase of convertible debt | $   $ 0 $ 7,855,000  
Redemption percentage   100.00%    
On or After March 1, 2023        
Debt Instrument [Line Items]        
Redemption threshold trading days       40
Redemption percentage       100.00%
Convertible senior notes        
Debt Instrument [Line Items]        
Face amount | $ $ 600,000,000      
Interest rate 0.75% 0.75% 0.75%  
Gain (loss) on repurchase of convertible debt | $   $ 7,900,000    
Principal amount repurchased | $   $ 97,700,000    
Initial conversion rate 0.0074045      
Initial conversion price (in dollars per share) | $ / shares $ 135.05      
Average interest rate   1.20% 1.20%  
Convertible senior notes | After the Calendar Quarter Ending on June 30, 2020        
Debt Instrument [Line Items]        
Threshold percentage of stock price trigger 130.00%      
Threshold trading days 20      
Threshold consecutive trading days 30      
Convertible senior notes | Measurement Period        
Debt Instrument [Line Items]        
Threshold percentage of stock price trigger 98.00%      
Threshold consecutive trading days 5      
Threshold consecutive business days 5      
Convertible senior notes | On or After March 1, 2023        
Debt Instrument [Line Items]        
Threshold percentage of stock price trigger       130.00%
Threshold trading days       20
Threshold consecutive trading days       30