Revenue from Contracts with Customers - Summary of Geographic Disaggregation of Net Sales (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Net sales	$ 751,633	$ 595,511	$ 1,426,909	$ 1,133,251
Surfactants [Member]
Disaggregation Of Revenue [Line Items]
Net sales	485,084	384,002	953,350	754,938
Polymers [Member]
Disaggregation Of Revenue [Line Items]
Net sales	238,885	190,538	425,964	340,923
Specialty Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	27,664	20,971	47,595	37,390
North America [Member]
Disaggregation Of Revenue [Line Items]
Net sales	434,769	335,054	819,529	640,804
North America [Member] | Surfactants [Member]
Disaggregation Of Revenue [Line Items]
Net sales	278,310	221,645	551,538	442,580
North America [Member] | Polymers [Member]
Disaggregation Of Revenue [Line Items]
Net sales	133,455	95,591	228,311	166,469
North America [Member] | Specialty Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	23,004	17,818	39,680	31,755
Europe [Member]
Disaggregation Of Revenue [Line Items]
Net sales	191,136	150,228	366,068	292,104
Europe [Member] | Surfactants [Member]
Disaggregation Of Revenue [Line Items]
Net sales	92,591	65,339	183,608	136,433
Europe [Member] | Polymers [Member]
Disaggregation Of Revenue [Line Items]
Net sales	94,424	82,453	175,207	150,753
Europe [Member] | Specialty Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	4,121	2,436	7,253	4,918
Latin America [Member]
Disaggregation Of Revenue [Line Items]
Net sales	99,675	81,671	186,452	142,830
Latin America [Member] | Surfactants [Member]
Disaggregation Of Revenue [Line Items]
Net sales	97,987	79,968	183,421	140,137
Latin America [Member] | Polymers [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,149	986	2,369	1,976
Latin America [Member] | Specialty Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	539	717	662	717
Asia [Member]
Disaggregation Of Revenue [Line Items]
Net sales	26,053	28,558	54,860	57,513
Asia [Member] | Surfactants [Member]
Disaggregation Of Revenue [Line Items]
Net sales	16,196	17,050	34,783	35,788
Asia [Member] | Polymers [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 9,857	$ 11,508	$ 20,077	$ 21,725