Segment Reporting - Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Net sales	$ 579,975	$ 751,633	$ 1,231,411	$ 1,426,909
Surfactants [Member]
Segment Reporting Information [Line Items]
Net sales	391,686	485,084	859,514	953,350
Polymers [Member]
Segment Reporting Information [Line Items]
Net sales	164,515	238,885	325,642	425,964
Specialty Products [Member]
Segment Reporting Information [Line Items]
Net sales	$ 23,774	$ 27,664	$ 46,255	$ 47,595