Earnings Per Share Attributable to Common Stockholders (Tables)

12 Months Ended

Dec. 31, 2023

Earnings Per Share [Abstract]

Schedule of earnings per share

Year ended December 31,	2023		2022		2021
Net income available to common stockholders	$	174.9	$	319.7	$	151.9
Denominator:
Basic weighted average share outstanding	166,963,575		110,781,282		110,315,782
Effect of dilutive securities:
Share units	689,290		516,144		388,083
Stock options and ESPP	551,116		588,599		702,965
Diluted average shares outstanding	168,203,981		111,886,025		111,406,830
Net income per share attributable to common shares:
Basic	$	1.05	$	2.89	$	1.38
Diluted	$	1.04	$	2.86	$	1.36