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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($)
$ in Millions
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Treasury Stock
Beginning balance at Dec. 31, 2019 $ 1,255.7 $ 0.3 $ 295.3 $ 1,542.4 $ (147.0) $ (435.3)
BALANCE (in shares) at Dec. 31, 2019   25,486,711        
Increase (Decrease) in Stockholders' Equity            
Net income 186.4     186.4    
Other comprehensive income (loss), net of taxes (59.3)       (59.3)  
Purchases of treasury stock (48.9)         (48.9)
Net issuance of treasury shares to stock compensation plans 1.6   (18.4)     20.0
Net issuance of treasury shares to stock compensation plans (in shares)   (46,964)        
Stock-based compensation 27.0   27.0      
Dividends declared (5.5)     (5.5)    
Ending balance at Sep. 30, 2020 1,356.9 $ 0.3 304.0 1,723.3 (206.3) (464.3)
BALANCE (in shares) at Sep. 30, 2020   25,439,746        
Beginning balance at Jun. 30, 2020 1,215.9 $ 0.3 300.0 1,596.9 (213.3) (467.9)
BALANCE (in shares) at Jun. 30, 2020   25,439,581        
Increase (Decrease) in Stockholders' Equity            
Net income 126.4     126.4    
Other comprehensive income (loss), net of taxes 7.0       7.0  
Net issuance of treasury shares to stock compensation plans 2.2   (1.4)     3.6
Net issuance of treasury shares to stock compensation plans (in shares)   165        
Stock-based compensation 5.3   5.3      
Ending balance at Sep. 30, 2020 1,356.9 $ 0.3 304.0 1,723.3 (206.3) (464.3)
BALANCE (in shares) at Sep. 30, 2020   25,439,746        
Beginning balance at Dec. 31, 2020 1,449.6 $ 0.3 308.3 1,817.9 (184.0) (492.8)
BALANCE (in shares) at Dec. 31, 2020   25,433,048        
Increase (Decrease) in Stockholders' Equity            
Net income 465.0     465.0    
Other comprehensive income (loss), net of taxes 17.9       17.9  
Purchases of treasury stock (18.6)         (18.6)
Net issuance of treasury shares to stock compensation plans 3.6   (7.1)     10.7
Net issuance of treasury shares to stock compensation plans (in shares)   (89,992)        
Stock-based compensation 19.0   19.0     0.0
Dividends declared (17.9)     (17.9)    
Ending balance at Sep. 30, 2021 1,918.6 $ 0.3 320.2 2,265.0 (166.1) (500.8)
BALANCE (in shares) at Sep. 30, 2021   25,343,056        
Beginning balance at Jun. 30, 2021 1,754.0 $ 0.3 313.6 2,099.1 (155.9) (503.1)
BALANCE (in shares) at Jun. 30, 2021   25,357,677        
Increase (Decrease) in Stockholders' Equity            
Net income 172.1     172.1    
Other comprehensive income (loss), net of taxes (10.2)       (10.2)  
Net issuance of treasury shares to stock compensation plans 3.2   0.8     2.3
Net issuance of treasury shares to stock compensation plans (in shares)   (14,621)        
Stock-based compensation 5.7   5.7      
Dividends declared (6.3)     (6.3)    
Ending balance at Sep. 30, 2021 $ 1,918.6 $ 0.3 $ 320.2 $ 2,265.0 $ (166.1) $ (500.8)
BALANCE (in shares) at Sep. 30, 2021   25,343,056