v3.26.1
Segment Reporting - Segment Data and Reconciliations of Segment Data to Consolidated Financial Statements and Non-GAAP Measures (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Segment Reporting Information [Line Items]      
Net Sales $ 604,509 $ 593,255  
Cost of Sales 539,658 517,792  
Operating Expenses 49,034 47,175  
Operating Income (49,622) 28,288  
Unallocated Capital Expenditures [1] (235) 593  
Consolidated Capital Expenditures 30,888 32,748  
Depreciation and Amortization 32,947 29,270  
Assets 2,333,337   $ 2,357,702
Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Net Sales 604,509 593,255  
Cost of Sales [2] 539,235 517,959  
Operating Expenses [3] 33,189 32,840  
Operating Income 32,085 42,456  
Segment Capital Expenditures 31,123 32,155  
Depreciation and Amortization 32,597 28,980  
Assets 2,222,400   2,249,599
Segment Reconciling Items [Member]      
Segment Reporting Information [Line Items]      
Unallocated Corporate Expenses [4] (81,707) (14,168)  
Unallocated Depreciation and Amortization [5] 350 290  
Unallocated Assets [6] 110,937   108,103
Surfactants [Member]      
Segment Reporting Information [Line Items]      
Net Sales 453,687 430,337  
Surfactants [Member] | Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Net Sales 453,687 430,337  
Cost of Sales [2] 410,017 376,666  
Operating Expenses [3] 25,122 24,741  
Operating Income 18,548 28,930  
Segment Capital Expenditures 22,383 24,004  
Depreciation and Amortization 22,568 19,430  
Assets 1,611,417   1,630,551
Polymers [Member]      
Segment Reporting Information [Line Items]      
Net Sales 130,029 146,116  
Polymers [Member] | Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Net Sales 130,029 146,116  
Cost of Sales [2] 114,045 130,896  
Operating Expenses [3] 7,162 7,202  
Operating Income 8,822 8,018  
Segment Capital Expenditures 7,278 7,071  
Depreciation and Amortization 8,576 8,061  
Assets 527,755   536,748
Specialty Products [Member]      
Segment Reporting Information [Line Items]      
Net Sales 20,793 16,802  
Specialty Products [Member] | Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Net Sales 20,793 16,802  
Cost of Sales [2] 15,173 10,397  
Operating Expenses [3] 905 897  
Operating Income 4,715 5,508  
Segment Capital Expenditures 1,462 1,080  
Depreciation and Amortization 1,453 $ 1,489  
Assets $ 83,228   $ 82,300
[1] Unallocated capital expenditures primarily include capital expenditures related to the Company’s Northfield, Illinois location.
[2] Cost of sales is comprised of raw material costs (including freight and shipping/handling expenses to deliver the raw materials), manufacturing plant labor expenses and other manufacturing overhead expenses, such as utilities, maintenance, depreciation, etc. that can be allocated to reportable segments.
[3] Operating expenses allocated to reportable segments are comprised of selling, administrative and research and development expenses. The CODM uses operating expenses in aggregate to analyze the performance of each reportable segment.
[4] Unallocated corporate expenses are primarily comprised of corporate administrative expenses (e.g., corporate finance, legal, human resources, information technology and environmental remediation expenses), deferred compensation and business restructuring expenses that are not included in segment operating income and not used to evaluate segment performance.
[5] Unallocated depreciation and amortization primarily includes depreciation related to the Company’s Northfield, Illinois location.
[6] Unallocated assets primarily include assets in the Company’s Northfield, Illinois location.