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Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($)
$ in Millions
Total
Common Stock Issued
Additional Paid-In Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Beginning Balance (in shares) at Dec. 31, 2019   30,896,661      
Beginning Balance at Dec. 31, 2019 $ 597.7 $ 3.1 $ 78.8 $ 638.4 $ (122.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 22.5     22.5  
Other comprehensive loss, net of tax (15.7)       (15.7)
Dividends declared (13.7)     (13.7)  
Restricted stock issuances, net (in shares)   320,005      
Stock-based employee compensation expense 2.1   2.1    
Stock issued to directors as compensation (in shares)   1,130      
Stock issued to directors as compensation 0.1   0.1    
Purchases and retirement of common stock (in shares)   (25,274)      
Purchases and retirement of common stock (1.0)     (1.0)  
Ending Balance (in shares) at Mar. 31, 2020   31,192,522      
Ending Balance at Mar. 31, 2020 592.0 $ 3.1 81.0 646.2 (138.3)
Beginning Balance (in shares) at Dec. 31, 2020   31,324,745      
Beginning Balance at Dec. 31, 2020 649.6 $ 3.1 92.2 666.2 (111.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income 21.6     21.6  
Other comprehensive loss, net of tax (3.8)       (3.8)
Dividends declared (13.8)     (13.8)  
Restricted stock issuances, net (in shares)   148,530      
Stock-based employee compensation expense 2.1   2.1    
Stock issued to directors as compensation (in shares)   590      
Stock issued to directors as compensation 0.3   0.3    
Purchases and retirement of common stock (in shares)   (66,729)      
Purchases and retirement of common stock (3.1)     (3.1)  
Ending Balance (in shares) at Mar. 31, 2021   31,407,136      
Ending Balance at Mar. 31, 2021 $ 652.9 $ 3.1 $ 94.6 $ 670.9 $ (115.7)