XML 49 R37.htm IDEA: XBRL DOCUMENT v3.21.2
EARNINGS PER SHARE (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Basic and Diluted Earnings per share        
Weighted average basic common shares outstanding (in shares) 17,747,518 17,771,447 17,752,577 17,767,449
Dilutive effect of employee stock purchases, net of assumed repurchase of treasury stock (in shares) 81,952 40,166 74,217 42,488
Weighted average dilutive common shares outstanding (in shares) 17,829,470 17,811,613 17,826,794 17,809,937
Basic:        
Net income $ 191.0 $ 30.2 $ 292.9 $ 60.0
Less: Earnings allocated to participating securities 6.4 1.1 9.9 2.2
Net income available to basic common shares $ 184.5 $ 29.1 $ 283.0 $ 57.8
Basic earnings per common share (in dollars per share) $ 10.40 $ 1.64 $ 15.94 $ 3.25
Diluted:        
Net income $ 191.0 $ 30.2 $ 292.9 $ 60.0
Less: Earnings allocated to participating securities 6.4 1.1 9.9 $ 2.1
Net income available to diluted common shares $ 184.5 $ 29.1 $ 283.0  
Diluted earnings per common share (in dollars per share) $ 10.35 $ 1.63 $ 15.88 $ 3.25