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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, 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)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income 94.0     94.0    
Total other comprehensive income (loss) (9.8)         (9.8)
Cash dividends declared (18.7)     (18.7)    
Stock-based payments:            
Stock-based compensation 7.0   7.0      
Stock option exercises and other 1.4 0.3 2.3   (1.2)  
Stock repurchase program (1.2)       (1.2)  
Ending Balance at Dec. 31, 2018 530.1 $ 66.4 $ 217.0 432.5 $ (88.5) (97.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Impact of adoption of ASU 2018-02 | Accounting Standards Update 2018-02 $ 0.0     $ 10.6   $ (10.6) [1]
[1] Refer to Note 1– Summary of Significant Accounting Policies for further discussion of the adoption of ASU 2018-02.