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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Millions
Total
Cumulative Effect, Period of Adoption, Adjustment
Common Stock
Additional paid-in capital
Retained earnings
Retained earnings
Cumulative Effect, Period of Adoption, Adjustment
Accumulated other comprehensive income (loss)
Treasury stock
Beginning balance (shares) at Dec. 31, 2019     42,675,200          
Beginning balance at Dec. 31, 2019 $ 530.8 $ (0.6) $ 0.4 $ 112.8 $ 497.2 $ (0.6) $ (5.0) $ (74.6)
Increase (Decrease) in Stockholders' Equity                
Net income (loss) 181.4       181.4      
Other comprehensive income (loss) 9.7           9.7  
Common stock issued (shares)     174,600          
Exercise of stock options, net (shares)     63,000.0          
Exercise of stock options, net 1.9     1.9        
Tax payments related to vested restricted stock units (3.2)             (3.2)
Share repurchase program (88.0)             (88.0)
Share-based compensation plans 10.1     6.6       3.5
Ending balance (shares) at Dec. 31, 2020     42,912,800          
Ending balance at Dec. 31, 2020 642.1   $ 0.4 121.3 678.0   4.7 (162.3)
Increase (Decrease) in Stockholders' Equity                
Net income (loss) 118.1       118.1      
Other comprehensive income (loss) 8.4           8.4  
Common stock issued (shares)     121,400          
Exercise of stock options, net (shares)     67,800          
Exercise of stock options, net 3.0     3.0        
Tax payments related to vested restricted stock units (2.4)             (2.4)
Share repurchase program (109.4)             (109.4)
Share-based compensation plans $ 14.0     12.0       2.0
Ending balance (shares) at Dec. 31, 2021 39,269,399   43,102,000          
Ending balance at Dec. 31, 2021 $ 673.8   $ 0.4 136.3 796.1   13.1 (272.1)
Increase (Decrease) in Stockholders' Equity                
Net income (loss) 211.6       211.6      
Other comprehensive income (loss) $ (59.9)           (59.9)  
Common stock issued (shares)     82,900          
Exercise of stock options, net (shares) 33,000   43,200          
Exercise of stock options, net $ 1.6     1.6        
Tax payments related to vested restricted stock units (2.2)             (2.2)
Share repurchase program (145.2)             (145.2)
Share-based compensation plans $ 18.6     15.1       3.5
Ending balance (shares) at Dec. 31, 2022 37,298,989   43,228,100          
Ending balance at Dec. 31, 2022 $ 698.3   $ 0.4 $ 153.0 $ 1,007.7   $ (46.8) $ (416.0)