Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2024

Earnings Per Share [Abstract]

Schedule of Calculation of Pro Forma Basic and Diluted Earnings Per Share

The calculation of basic and diluted earnings per share of common stock for the years ended December 31, 2024, 2023 and 2022 is as follows (dollars in millions, except per share data):

	2024		2023		2022
Numerator:
Net income attributable to controlling interests	$	85.0	$	65.8	$	100.6
Denominator:
Weighted-average shares of common stock outstanding—basic	37,770,185		41,493,154		42,056,278
Potential shares of common stock:
Restricted stock units	22,178		7,448		14,147
Employee stock options	536,043		1,037,341		1,085,844
Weighted-average shares of common stock outstanding—diluted	38,328,406		42,537,943		43,156,269
Earnings per share of common stock attributable to controlling interests:
Basic	$	2.25	$	1.59	$	2.39
Diluted	$	2.22	$	1.55	$	2.33