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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (UNAUDITED) - USD ($)
$ in Millions
Total
Common Stock
Additional Paid-in Capital
Accumulated Deficit
Accumulated Other Comprehensive (Loss) Income
Beginning balance (in shares) at Dec. 31, 2022   69,511,000      
Balance at beginning of period at Dec. 31, 2022 $ 476.4 $ 0.1 $ 1,040.6 $ (584.3) $ 20.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of options to purchase common stock (in shares)   202,000      
Exercise of options to purchase common stock 12.4   12.4    
Issuance of shares for employee stock purchase plan (in shares)   23,000      
Issuance of shares for employee stock purchase plan 5.5   5.5    
Stock-based compensation expense 35.7   35.7    
Restricted stock units vested, net of shares withheld for taxes (in shares)   90,000      
Restricted stock units vested, net of shares withheld for taxes (13.1)   (13.1)    
Net income 103.0     103.0  
Other comprehensive income (loss) (12.4)       (12.4)
Ending balance (in shares) at Sep. 30, 2023   69,826,000      
Balance at the end of period at Sep. 30, 2023 607.5 $ 0.1 1,081.1 (481.3) 7.6
Beginning balance (in shares) at Jun. 30, 2023   69,804,000      
Balance at beginning of period at Jun. 30, 2023 553.9 $ 0.1 1,070.7 (533.2) 16.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of options to purchase common stock (in shares)   19,000      
Exercise of options to purchase common stock 0.1   0.1    
Stock-based compensation expense 10.5   10.5    
Restricted stock units vested, net of shares withheld for taxes (in shares)   3,000      
Restricted stock units vested, net of shares withheld for taxes (0.2)   (0.2)    
Net income 51.9     51.9  
Other comprehensive income (loss) (8.7)       (8.7)
Ending balance (in shares) at Sep. 30, 2023   69,826,000      
Balance at the end of period at Sep. 30, 2023 $ 607.5 $ 0.1 1,081.1 (481.3) 7.6
Beginning balance (in shares) at Dec. 31, 2023 69,907,289 69,907,000      
Balance at beginning of period at Dec. 31, 2023 $ 732.7 $ 0.1 1,102.6 (378.0) 8.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of options to purchase common stock (in shares)   117,000      
Exercise of options to purchase common stock 7.7   7.7    
Issuance of shares for employee stock purchase plan (in shares)   40,000      
Issuance of shares for employee stock purchase plan 6.0   6.0    
Stock-based compensation expense 49.3   49.3    
Restricted stock units vested, net of shares withheld for taxes (in shares)   78,000      
Restricted stock units vested, net of shares withheld for taxes (7.0)   (7.0)    
Net income 317.6     317.6  
Other comprehensive income (loss) $ 11.7       11.7
Ending balance (in shares) at Sep. 30, 2024 70,141,692 70,142,000      
Balance at the end of period at Sep. 30, 2024 $ 1,118.0 $ 0.1 1,158.6 (60.4) 19.7
Beginning balance (in shares) at Jun. 30, 2024   70,112,000      
Balance at beginning of period at Jun. 30, 2024 998.4 $ 0.1 1,140.6 (137.9) (4.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Exercise of options to purchase common stock (in shares)   21,000      
Exercise of options to purchase common stock 0.8   0.8    
Stock-based compensation expense 18.1   18.1   0.0
Restricted stock units vested, net of shares withheld for taxes (in shares)   9,000      
Restricted stock units vested, net of shares withheld for taxes (0.9)   (0.9)    
Net income 77.5     77.5  
Other comprehensive income (loss) $ 24.1       24.1
Ending balance (in shares) at Sep. 30, 2024 70,141,692 70,142,000      
Balance at the end of period at Sep. 30, 2024 $ 1,118.0 $ 0.1 $ 1,158.6 $ (60.4) $ 19.7