Goodwill and Other Intangibles (Tables)

9 Months Ended

Sep. 30, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Goodwill

The following table summarizes the changes in goodwill by reportable segment for the nine-month period ended September 30, 2024 (in thousands):

	Energy Storage		Specialties		Ketjen		Total
Balance at December 31, 2023(a)	$	1,424,484	$	32,639	$	172,606	$	1,629,729
Foreign currency translation adjustments	7,158		47		824		8,029
Balance at September 30, 2024(a)	$	1,431,642	$	32,686	$	173,430	$	1,637,758

(a)    Balance at September 30, 2024 and December 31, 2023 includes an accumulated impairment loss of $6.8 million in Ketjen. As a result, the balance of Ketjen at September 30, 2024 and December 31, 2023 fully consists of goodwill related to the Refining Solutions reporting unit.

Other Intangibles

The following table summarizes the changes in other intangibles and related accumulated amortization for the nine-month period ended September 30, 2024 (in thousands):

	Customer Lists and Relationships		Trade Names and Trademarks(a)		Patents and Technology		Other		Total
Gross Asset Value
Balance at December 31, 2023	$	417,803	$	13,405	$	46,287	$	34,649	$	512,144
Retirements	—		(2,309)		(14,506)		(4,409)		(21,224)
Foreign currency translation adjustments and other	1,260		(23)		1,047		29		2,313
Balance at September 30, 2024	$	419,063	$	11,073	$	32,828	$	30,269	$	493,233
Accumulated Amortization
Balance at December 31, 2023	$	(204,481)	$	(3,673)	$	(26,758)	$	(15,374)	$	(250,286)
Amortization	(14,688)		—		(1,896)		(679)		(17,263)
Retirements	—		2,309		14,506		4,409		21,224
Foreign currency translation adjustments and other	(946)		40		61		15		(830)
Balance at September 30, 2024	$	(220,115)	$	(1,324)	$	(14,087)	$	(11,629)	$	(247,155)
Net Book Value at December 31, 2023	$	213,322	$	9,732	$	19,529	$	19,275	$	261,858
Net Book Value at September 30, 2024	$	198,948	$	9,749	$	18,741	$	18,640	$	246,078

(a)    Net Book Value includes only indefinite-lived intangible assets.