Earnings per Common Share - Tables

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Computation of Basic and Diluted Earnings per Share

The following table sets forth the computation of basic and diluted earnings per common share:

Year Ended December 31,	2020		2019		2018
Net income, basic and diluted	$	161.2	$	181.0	$	160.2
Weighted average common shares outstanding for basic earnings per share computation	63,611,891		63,645,029		57,778,857
Dilutive effects of stock-based compensation	117,579		239,839		438,266
Weighted average common shares outstanding for diluted earnings per common share computation	63,729,470		63,884,868		58,217,123
Basic earnings per common share	$	2.53	$	2.84	$	2.77
Diluted earnings per common share	2.53		2.83		2.75