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Supplemental equity and other information - Narrative (Details)
$ / shares in Units, $ in Millions
 3 Months Ended
Mar. 31, 2025
USD ($)
shares
$ / shares
Mar. 31, 2024
USD ($)
Dec. 31, 2024
$ / shares
shares
Feb. 01, 2022
USD ($)
Stockholders Equity Note        
Share-based compensation cost | $ $ 2.9 $ 2.8    
Unrecognized compensation cost related to non-vested share-based compensation | $ $ 11.3      
Weighted average period (in years) 2 years      
Preferred stock authorized (in shares) 300,000   300,000  
Preferred stock, par value (in dollars per share) | $ / shares $ 0.01   $ 0.01  
Preferred stock, issued (in shares) 0   0  
Stock Repurchase Program        
Stockholders Equity Note        
Shares authorized for repurchase, value | $       $ 100.0
Repurchase of common stock (in shares) 0      
Remaining authorized shares for share repurchase program | $ $ 96.9      
Preferred Stock        
Stockholders Equity Note        
Issuance of preferred stock (in shares) 0      
Restricted Stock Awards        
Stockholders Equity Note        
Granted (in shares) 13,000      
Cash Performance Units And Long-Term Cash Awards        
Stockholders Equity Note        
Vesting period (in years) 3 years      
Unrecognized compensation expense | $ $ 13.5      
2027 Notes | Convertible Debt        
Stockholders Equity Note        
Aggregate shares receivable upon conversion (in shares) 22,500,000      
Securities excluded from computation of earnings per share (in shares) 14,900,000      
2031 Notes | Convertible Debt        
Stockholders Equity Note        
Aggregate shares receivable upon conversion (in shares) 143,900,000      
Securities excluded from computation of earnings per share (in shares) 99,100,000