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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Millions
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Treasury Stock
BALANCE (in shares) at Dec. 31, 2016   25,662,982        
BALANCE at Dec. 31, 2016 $ 930.2 $ 0.3 $ 290.9 $ 1,053.3 $ (146.9) $ (267.3)
Net income (loss) 213.4     213.4    
Other comprehensive income (loss), net of taxes 23.7       23.7  
Purchases of treasury stock (42.1)         (42.1)
Net issuance of treasury shares to employee stock compensation plans (in shares)   (147,608)        
Net issuance of treasury shares to stock compensation plans 0.6   (18.3)     18.9
Stock-based compensation 18.9   18.9      
Cash dividends, net of estimated forfeitures related to participating securities (20.4)     (20.4)    
BALANCE (in shares) at Dec. 31, 2017   25,515,374        
BALANCE at Dec. 31, 2017 1,124.3 $ 0.3 291.5 1,246.3 (123.2) (290.5)
Net income (loss) 157.8     157.8    
Other comprehensive income (loss), net of taxes (14.4)       (14.4)  
Tax effects reclassified from accumulated other comprehensive income 0.0     0.2 (0.2)  
Purchases of treasury stock (183.9)         (183.9)
Net issuance of treasury shares to employee stock compensation plans (in shares)   (21,046)        
Net issuance of treasury shares to stock compensation plans 2.7   (17.4)     20.1
Stock-based compensation 18.7   18.7      
Cash dividends, net of estimated forfeitures related to participating securities (20.8)     (20.8)    
BALANCE (in shares) at Dec. 31, 2018   25,494,328        
BALANCE at Dec. 31, 2018 1,095.7 $ 0.3 292.8 1,394.8 (137.8) (454.4)
Net income (loss) 174.0     174.0    
Other comprehensive income (loss), net of taxes (9.2)       (9.2)  
Purchases of treasury stock (1.4)         (1.4)
Net issuance of treasury shares to employee stock compensation plans (in shares)   (7,617)        
Net issuance of treasury shares to stock compensation plans 4.2   (16.3)     20.5
Stock-based compensation 18.8   18.8      
Cash dividends, net of estimated forfeitures related to participating securities (20.3)     (20.3)    
BALANCE (in shares) at Dec. 31, 2019   25,486,711        
BALANCE at Dec. 31, 2019 $ 1,255.7 $ 0.3 $ 295.3 $ 1,542.4 $ (147.0) $ (435.3)