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Earnings per Common Share
 6 Months Ended
Jun. 30, 2024
Earnings Per Share [Abstract]  
Earnings per Common Share Earnings per Common Share
Basic earnings per common share is calculated by dividing net income by the weighted average number of common shares outstanding during the period presented, excluding unvested restricted stock. Diluted earnings per share is calculated by dividing net income by the weighted average number of common shares determined for the basic earnings per share computation plus the dilutive effects of stock-based compensation using the treasury stock method.
The following table sets forth the computation of basic and diluted earnings per share for the periods presented:
Three Months Ended June 30,Six Months Ended June 30,
2024202320242023
Net income$60.0 $67.0 $118.4 $123.3 
Weighted average common shares outstanding for basic earnings per share computation
102,936,996 103,820,649 102,890,697 103,779,386 
Dilutive effects of stock-based compensation
156,139 2,242 184,746 42,539 
Weighted average common shares outstanding for diluted earnings per common share computation
103,093,135 103,822,891 103,075,443 103,821,925 
Basic earnings per common share$0.58 $0.65 $1.15 $1.19 
Diluted earnings per common share0.58 0.65 1.15 1.19 
Anti-dilutive unvested time restricted stock55,785 222,417 55,953 129,449 
The Company had 786,790 and 974,875 shares of unvested restricted stock as of June 30, 2024 and 2023, respectively, that were not included in the computation of diluted earnings per common share because performance conditions for vesting had not been met.