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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (UNAUDITED) - USD ($)
shares in Thousands, $ in Millions
Total
Common Stock
Additional Paid-in Capital
Accumulated Earnings
Accumulated Other Comprehensive (Loss) Income
Treasury Stock
Deferred Compensation
Beginning balance (in shares) at Dec. 31, 2023   69,907          
Balance at beginning of period at Dec. 31, 2023 $ 732.7 $ 0.1 $ 1,102.7 $ (378.0) $ 8.0    
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 240.1     240.1      
Other comprehensive income (loss), net of tax (12.4)       (12.4)    
Exercise of options to purchase common stock (in shares)   96          
Exercise of options to purchase common stock 6.9   6.9        
Issuance of shares for employee stock purchase plan (in shares)   40          
Issuance of shares for employee stock purchase plan 6.0   6.0        
Stock-based compensation expense 31.2   31.2        
Restricted stock units vested, net of shares withheld for taxes (in shares)   69          
Restricted stock units vested, net of shares withheld for taxes (6.1)   (6.1)        
Ending balance (in shares) at Jun. 30, 2024   70,112          
Balance at the end of period at Jun. 30, 2024 998.4 $ 0.1 1,140.6 (137.9) (4.4)    
Beginning balance (in shares) at Mar. 31, 2024   70,020          
Balance at beginning of period at Mar. 31, 2024 790.7 $ 0.1 1,117.6 (326.5) (0.4)    
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 188.6     188.6      
Other comprehensive income (loss), net of tax (3.9)       (3.9)    
Exercise of options to purchase common stock (in shares)   40          
Exercise of options to purchase common stock 1.1   1.1        
Issuance of shares for employee stock purchase plan (in shares)   40          
Issuance of shares for employee stock purchase plan 6.0   6.0        
Stock-based compensation expense 17.0   17.0        
Restricted stock units vested, net of shares withheld for taxes (in shares)   12          
Restricted stock units vested, net of shares withheld for taxes (1.0)   (1.0)        
Ending balance (in shares) at Jun. 30, 2024   70,112          
Balance at the end of period at Jun. 30, 2024 998.4 $ 0.1 1,140.6 (137.9) (4.4)    
Beginning balance (in shares) at Dec. 31, 2024   70,196          
Balance at beginning of period at Dec. 31, 2024 1,211.6 $ 0.1 1,184.4 40.3 (13.2) $ 0.0 $ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 57.9     57.9      
Other comprehensive income (loss), net of tax 28.6       28.6    
Exercise of options to purchase common stock (in shares)   108          
Exercise of options to purchase common stock 12.6   12.6        
Issuance of shares for employee stock purchase plan (in shares)   31          
Issuance of shares for employee stock purchase plan 7.1   7.1        
Stock-based compensation expense 25.7   25.7        
Restricted stock units vested, net of shares withheld for taxes (in shares)   148          
Restricted stock units vested, net of shares withheld for taxes $ (22.9)   (22.9)        
Repurchase of common stock (in shares) (93) (93)          
Repurchase of common stock $ (30.1)         (30.1)  
Deferred compensation 0.0         (0.9) 0.9
Settlement of capped call options 172.4   172.4        
Ending balance (in shares) at Jun. 30, 2025   70,391          
Balance at the end of period at Jun. 30, 2025 1,462.9 $ 0.1 1,379.4 98.2 15.4 (31.0) 0.9
Beginning balance (in shares) at Mar. 31, 2025   70,362          
Balance at beginning of period at Mar. 31, 2025 1,330.6 $ 0.1 1,260.9 75.7 (6.0) (0.2) 0.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net income 22.5     22.5      
Other comprehensive income (loss), net of tax 21.4       21.4    
Exercise of options to purchase common stock (in shares)   71          
Exercise of options to purchase common stock 10.1   10.1        
Issuance of shares for employee stock purchase plan (in shares)   31          
Issuance of shares for employee stock purchase plan 7.1   7.1        
Stock-based compensation expense 7.5   7.5        
Restricted stock units vested, net of shares withheld for taxes (in shares)   20          
Restricted stock units vested, net of shares withheld for taxes $ (1.6)   (1.6)        
Repurchase of common stock (in shares) (93) (93)          
Repurchase of common stock $ (30.1)         (30.1)  
Deferred compensation 0.0         (0.7) 0.7
Settlement of capped call options 95.4   95.4        
Ending balance (in shares) at Jun. 30, 2025   70,391          
Balance at the end of period at Jun. 30, 2025 $ 1,462.9 $ 0.1 $ 1,379.4 $ 98.2 $ 15.4 $ (31.0) $ 0.9