Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in the net carrying amount of goodwill by operating segment were as follows:

(Dollars in millions)	Advanced Electronics Solutions		Elastomeric Material Solutions		Other		Total
December 31, 2024	$	113.6	$	241.8	$	2.2	$	357.6
Foreign currency translation adjustment	2.6		3.2		—		5.8
March 31, 2025	$	116.2	$	245.0	$	2.2	$	363.4

Schedule of Intangible Assets

The carrying amount of other intangible assets were as follows:

	March 31, 2025						December 31, 2024
(Dollars in millions)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer relationships	$	177.9	$	98.6	$	79.3	$	175.9	$	96.1	$	79.8
Technology	76.9		62.5		14.4		75.6		60.6		15.0
Trademarks and trade names	19.5		7.9		11.6		19.1		7.7		11.4
Total definite-lived other intangible assets	274.3		169.0		105.3		270.6		164.4		106.2
Indefinite-lived other intangible asset	4.3		—		4.3		4.1		—		4.1
Total other intangible assets	$	278.6	$	169.0	$	109.6	$	274.7	$	164.4	$	110.3

The amortization expense related to other intangible assets was as follows:

	Three Months Ended
(Dollars in millions)	March 31, 2025		March 31, 2024
Amortization expense	$	2.7	$	3.1

Schedule of Weighted Average Amortization Period, by Intangible Asset Class

The weighted average amortization period as of March 31, 2025, by definite-lived other intangible asset class, is presented in the table below:

	Weighted Average Remaining Amortization Period
Customer relationships	6.9 years
Technology	3.0 years
Trademarks and trade names	9.2 years
Total definite-lived other intangible assets	6.6 years