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Consolidated Statements Of Stockholders' Equity - USD ($)
$ in Millions
Total
Common Stock Par Value
Capital in Excess of Par Value
Retained Earnings
Treasury Stock
Accumulated Other Comprehensive Loss
Beginning Balance at Dec. 31, 2014 $ 371.6 $ 64.2 $ 187.0 $ 227.0 $ (27.1) $ (79.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 63.5     63.5    
Total other comprehensive income (loss) (9.3)         (9.3)
Cash dividends declared (15.6)     (15.6)    
Stock-based payments:            
Stock-based compensation 6.3   6.3      
Stock option exercises and other 0.8 0.1 1.2   (0.5)  
Performance share unit transactions (2.7) 0.5 (0.5)   (2.7)  
Excess tax benefit from stock-based compensation 1.6   1.6      
Stock repurchase program (10.6)       (10.6)  
Ending Balance at Dec. 31, 2015 405.6 64.8 195.6 274.9 (40.9) (88.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 43.8     43.8    
Total other comprehensive income (loss) (3.2)         (3.2)
Cash dividends declared (16.9)     (16.9)    
Stock-based payments:            
Stock-based compensation 4.3   4.3      
Stock option exercises and other 0.7 0.2 0.8   (0.3)  
Performance share unit transactions (2.4) 0.4 (0.4)   (2.4)  
Stock repurchase program (37.8)       (37.8)  
Ending Balance at Dec. 31, 2016 394.1 65.4 200.3 301.8 (81.4) (92.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 61.6     61.6    
Total other comprehensive income (loss) 15.1         15.1
Cash dividends declared (16.8)     (16.8)    
Stock-based payments:            
Stock-based compensation 4.0   4.0      
Stock option exercises and other 1.3 0.5 3.6   (2.8)  
Performance share unit transactions (1.9) 0.2 (0.2)   (1.9)  
Ending Balance at Dec. 31, 2017 $ 457.4 $ 66.1 $ 207.7 $ 346.6 $ (86.1) $ (76.9)