Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Value of Goodwill

The changes in the carrying value of goodwill for the years ended December 31, 2025 and 2024, were as follows:

	Surfactants Segment						Polymer Segment					Specialty Products Segment						Total
(In thousands)	2025			2024			2025		2024			2025			2024			2025			2024
Balance as of January 1
Goodwill	$	26,476		$	29,781		$	70,397	$	73,166		$	483		$	483		$	97,356		$	103,430
Accumulated impairment    loss		(5,505	)		(5,505	)		—		—			(483	)		(483	)		(5,988	)		(5,988	)
Goodwill, net		20,971			24,276			70,397		73,166			—			—			91,368			97,442
Goodwill impairment		(6,245	)		—			—		—			—			—			(6,245	)		—
Foreign currency    translation		1,756			(3,305	)		5,691		(2,769	)		—			—			7,447			(6,074	)
Balance as of December 31
Goodwill		28,232			26,476			76,088		70,397			483			483			104,803			97,356
Accumulated impairment    loss		(11,750	)		(5,505	)		—		—			(483	)		(483	)		(12,233	)		(5,988	)
Goodwill, net	$	16,482		$	20,971		$	76,088	$	70,397		$	—		$	—		$	92,570		$	91,368

Components of Other Intangible Assets and Changes in Gross Carrying Values

The following table presents the components of other intangible assets, all of which have finite lives, as of December 31, 2025 and 2024. The year-over-year changes in gross carrying values resulted from the effects of foreign currency translation.

	Gross Carrying Value				Accumulated Amortization
	December 31				December 31
(In thousands)	2025		2024		2025		2024
Other Intangible Assets:
Patents	$	7,411	$	7,411	$	7,125	$	7,095
Non-compete agreements		379		329		379		329
Trademarks		11,987		11,567		8,942		7,749
Customer lists/relationships		48,489		45,341		21,777		18,415
Know-how (1)		29,934		29,086		20,451		17,473
Total	$	98,200	$	93,734	$	58,674	$	51,061

(1)Know-how includes intellectual property rights covering proprietary information, written formulae, trade secrets or secret processes, inventions and developmental products (whether patentable or not), discoveries, improvements, compositions, manufacturing processes, manuals, specifications and technical data.

Estimated Amortization Expense for Identifiable Intangibles Assets

Estimated amortization expense for identifiable intangibles assets for each of the five succeeding fiscal years is as follows:

(In thousands)
For the year ended December 31, 2026	$	6,488
For the year ended December 31, 2027		6,488
For the year ended December 31, 2028		4,806
For the year ended December 31, 2029		3,715
For the year ended December 31, 2030		3,367