Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2023

Earnings Per Share [Abstract]

Schedule of Computation of Basic and Diluted Earnings Per Share

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

	Years Ended December 31,
(Dollars and shares in millions, except per share amounts)	2023		2022		2021
Numerator:
Net income	$	56.6	$	116.6	$	108.1
Denominator:
Weighted average shares outstanding - basic	18.6		18.8		18.7
Effect of dilutive shares	0.1		0.2		0.2
Weighted average shares outstanding - diluted	18.7		19.0		18.9
Basic earnings per share	$	3.04	$	6.21	$	5.77
Diluted earnings per share	$	3.03	$	6.15	$	5.73