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Segment Reporting - Reconciliation of Segment Information to Income Before Provision for Income Taxes (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Segment Reporting Information [Line Items]        
Operating Income $ 19,517 $ 54,659 $ 58,383 $ 195,645
Business restructuring (5,628) (92) (5,827) (225)
Other Income (Expense)        
Interest, net (2,987) (2,221) (9,674) (7,254)
Other, net (690) (1,980) 3,348 (8,999)
Income before provision for income taxes 15,840 50,458 52,057 179,392
Operating Segments [Member]        
Segment Reporting Information [Line Items]        
Operating Income 39,588 80,525 114,411 244,145
Operating Segments [Member] | Surfactants [Member]        
Segment Reporting Information [Line Items]        
Operating Income 15,373 38,976 57,570 140,994
Operating Segments [Member] | Polymers [Member]        
Segment Reporting Information [Line Items]        
Operating Income 21,813 31,864 48,137 79,905
Operating Segments [Member] | Specialty Products [Member]        
Segment Reporting Information [Line Items]        
Operating Income 2,402 9,685 8,704 23,246
Segment Reconciling Items [Member]        
Segment Reporting Information [Line Items]        
Unallocated corporate expenses [1] $ (14,443) $ (25,774) $ (50,201) $ (48,275)
[1] Unallocated corporate expenses are primarily comprised of corporate administrative expenses (e.g., corporate finance, legal, human resources, information systems, deferred compensation and environmental remediation) that are not included in segment operating income and are not used to evaluate segment performance.