Segment Reporting - Segment Data and Reconciliations of Segment Data to Consolidated Financial Statements and Non-GAAP Measures (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net Sales	[1]	$ 2,180,274	$ 2,325,768	$ 2,773,270
Cost of Sales		1,908,060	2,048,170	2,346,201
Operating Expenses		201,734	204,979	218,447
Operating income		70,480	58,613	207,336
Assets		2,304,648	2,363,354	2,433,172
Consolidated Capital Expenditures		122,776	260,335	301,553
Depreciation and Amortization		112,197	105,338	94,650
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales		2,180,274	2,325,768	2,773,270
Cost of Sales	[2]	1,908,143	2,050,495	2,347,404
Operating Expenses	[3]	124,982	130,628	150,328
Operating income		147,149	144,645	275,538
Assets		2,172,779	2,193,849	2,241,161
Segment Capital Expenditures		120,585	260,622	300,047
Depreciation and Amortization		110,394	102,592	92,468
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Unallocated Corporate Expenses	[4]	(76,669)	(86,032)	(68,202)
Unallocated Assets	[5]	131,869	169,505	192,011
Unallocated Capital Expenditures	[6]	2,191	(287)	1,506
Unallocated Depreciation and Amortization	[7]	1,803	2,746	2,182
Surfactants [Member]
Segment Reporting Information [Line Items]
Net Sales		1,532,115	1,602,819	1,882,745
Surfactants [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales		1,532,115	1,602,819	1,882,745
Cost of Sales	[2]	1,352,022	1,431,462	1,605,983
Operating Expenses	[3]	94,475	98,958	114,016
Operating income		85,618	72,399	162,746
Assets		1,578,689	1,586,148	1,579,242
Segment Capital Expenditures		90,766	231,341	259,442
Depreciation and Amortization		72,028	64,377	55,262
Polymers [Member]
Segment Reporting Information [Line Items]
Net Sales		584,905	642,471	789,080
Polymers [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales		584,905	642,471	789,080
Cost of Sales	[2]	516,902	553,590	674,293
Operating Expenses	[3]	27,380	28,111	31,890
Operating income		40,623	60,770	82,897
Assets		523,192	537,193	565,726
Segment Capital Expenditures		25,827	19,971	35,679
Depreciation and Amortization		32,417	32,426	31,399
Specialty Products [Member]
Segment Reporting Information [Line Items]
Net Sales		63,254	80,478	101,445
Specialty Products [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Net Sales		63,254	80,478	101,445
Cost of Sales	[2]	39,219	65,443	67,128
Operating Expenses	[3]	3,127	3,559	4,422
Operating income		20,908	11,476	29,895
Assets		70,898	70,508	96,193
Segment Capital Expenditures		3,992	9,310	4,926
Depreciation and Amortization		$ 5,949	$ 5,789	$ 5,807

[1] Net sales are attributed to countries based on the location of the Company legal entity making the sale.

[2] Cost of sales is comprised of raw material costs (including freight and outbound shipping and handling expenses to deliver the raw materials), manufacturing plant labor expenses and various manufacturing overhead expenses, such as utilities, maintenance, operating supplies, amortization and manufacturing asset depreciation expenses, warehouse and rail car expenses that can be allocated to reportable segments. For more details about items included in Cost of sales line item on the Consolidated Statements of Income, see Note 1, Summary of Significant Accounting Policies, of the notes to the Company’s consolidated financial statements included in Item 8 of this Form 10-K).

[3] Operating expenses allocated to reportable segments are comprised of selling, administrative and research and development expenses. CODM uses operating expenses balances in its aggregate to analyze the performance of each reportable segment. For more details about items included in Operating expenses line items on the Consolidated Statements of Income, see Note 1, Summary of Significant Accounting Policies, of the notes to the Company’s consolidated financial statements included in Item 8 of this Form 10-K).

[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 and assets impairment expenses that are not included in segment operating income and not used to evaluate segment performance. For more details about items included in unallocated corporate expenses, see Note 22, Business Restructuring and Assets Impairment, of the notes to the Company’s consolidated financial statements included in Item 8 of this Form 10-K).

[5] Unallocated assets primarily include assets in the Company’s Northfield, Illinois location.

[6] Unallocated capital expenditures primarily include capital expenditures related to Company’s Northfield, Illinois location.

[7] Unallocated depreciation and amortization primarily includes depreciation related to the Company’s Northfield, Illinois location.