Revenue from Contracts with Customers - Summary of Geographic Disaggregation of Net Sales (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation Of Revenue [Line Items]
Net sales	$ 593,255	$ 551,418
Surfactants [Member]
Disaggregation Of Revenue [Line Items]
Net sales	430,337	390,820
Polymers [Member]
Disaggregation Of Revenue [Line Items]
Net sales	146,116	145,508
Specialty Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	16,802	15,090
North America [Member]
Disaggregation Of Revenue [Line Items]
Net sales	337,992	312,646
North America [Member] | Surfactants [Member]
Disaggregation Of Revenue [Line Items]
Net sales	251,735	229,591
North America [Member] | Polymers [Member]
Disaggregation Of Revenue [Line Items]
Net sales	72,793	69,809
North America [Member] | Specialty Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	13,464	13,246
Europe [Member]
Disaggregation Of Revenue [Line Items]
Net sales	146,007	136,489
Europe [Member] | Surfactants [Member]
Disaggregation Of Revenue [Line Items]
Net sales	81,598	70,778
Europe [Member] | Polymers [Member]
Disaggregation Of Revenue [Line Items]
Net sales	61,142	63,877
Europe [Member] | Specialty Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	3,267	1,835
Latin America [Member]
Disaggregation Of Revenue [Line Items]
Net sales	83,131	78,294
Latin America [Member] | Surfactants [Member]
Disaggregation Of Revenue [Line Items]
Net sales	82,764	77,868
Latin America [Member] | Polymers [Member]
Disaggregation Of Revenue [Line Items]
Net sales	296	417
Latin America [Member] | Specialty Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	71	9
Asia [Member]
Disaggregation Of Revenue [Line Items]
Net sales	26,125	23,989
Asia [Member] | Surfactants [Member]
Disaggregation Of Revenue [Line Items]
Net sales	14,240	12,584
Asia [Member] | Polymers [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 11,885	$ 11,405