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Convertible Notes (Details)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Nov. 03, 2021
shares
Oct. 22, 2021
USD ($)
$ / shares
Nov. 30, 2020
USD ($)
day
$ / shares
shares
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
shares
Jun. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Debt Instrument [Line Items]                
Purchase of capped call options associated with convertible notes     $ 46.0          
Prepayment of forward stock repurchase transaction     $ 55.0          
Underlying common stock (in shares) | shares     1,994,198          
Shares delivered to the company (in shares) | shares           448,698    
Capped Call | Common stock                
Debt Instrument [Line Items]                
Exercise price (in dollars per share) | $ / shares     $ 55.16          
Class of warrant or right, premium percentage     100.00%          
Convertible Senior Notes Due 2025 | Convertible Debt                
Debt Instrument [Line Items]                
Debt instrument, face amount     $ 280.0          
Debt instrument, stated interest rate     4.00%          
Proceeds from debt, net of issuance costs     $ 271.1          
Debt instrument, convertible, conversion ratio     30.2151          
Debt instrument, convertible, conversion price (in dollars per share) | $ / shares     $ 33.096          
Debt instrument, redemption price, percentage     100.00%          
Exchange Agreement, amount of principal amount converted into common stock   $ 15.0            
Exchange Agreement, weighted average price per share floor (in dollars per share) | $ / shares   $ 5.62            
Exchange Agreement, threshold trading days   5 days            
Common stock being exchanged (in shares) | shares 1,094,848              
Principal amount of convertible notes       $ 265.0   $ 265.0    
Debt issuance costs       2.5   2.5    
Long-term debt       262.5   262.5    
Debt interest expense       3.1 $ 3.0 6.2 $ 6.1  
Debt fair value       $ 244.2   $ 244.2   $ 155.9
Convertible Senior Notes Due 2025 | Convertible Debt | Purchaser Discounts And Commissions And Offering Expenses Payable                
Debt Instrument [Line Items]                
Accrued debt issuance costs     $ 8.9          
Convertible Senior Notes Due 2025 | Convertible Debt | Period One                
Debt Instrument [Line Items]                
Debt instrument, convertible, threshold percentage of stock price trigger     130.00%          
Debt instrument, convertible, threshold trading days | day     20          
Average trading-day period | day     30          
Number of business days | day     5          
Number of consecutive trading days | day     5          
Debt instrument, convertible, threshold percentage of last reported sale price     98.00%          
Convertible Senior Notes Due 2025 | Convertible Debt | Period Two                
Debt Instrument [Line Items]                
Debt instrument, convertible, threshold percentage of stock price trigger     130.00%          
Debt instrument, convertible, threshold trading days | day     20          
Average trading-day period | day     30          
Debt instrument, redemption price, percentage     100.00%          
Debt instrument, required amount outstanding     $ 125.0