Segment Reporting - Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Net sales	$ 546,842	$ 562,226	$ 1,654,665	$ 1,793,637
Surfactants [Member]
Segment Reporting Information [Line Items]
Net sales	382,724	373,836	1,153,339	1,233,351
Polymers [Member]
Segment Reporting Information [Line Items]
Net sales	149,796	169,559	455,061	495,200
Specialty Products [Member]
Segment Reporting Information [Line Items]
Net sales	$ 14,322	$ 18,831	$ 46,265	$ 65,086