Ecovyst, Inc. Annual report [Section 13 and 15(d), not S-K Item 405]

Annual report [Section 13 and 15(d), not S-K Item 405]

Revenue from Contracts with Customers - Disaggregated Revenue (Details)

Revenue from Contracts with Customers - Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Sales	$ 199,434	$ 204,907	$ 176,065	$ 143,109	$ 148,867	$ 153,868	$ 153,958	$ 141,602	$ 723,515	$ 598,295	$ 584,845
Regeneration and treatment services
Disaggregation of Revenue [Line Items]
Sales									361,240	357,376	354,606
Industrial, mining & automotive
Disaggregation of Revenue [Line Items]
Sales									327,935	206,923	200,389
Other
Disaggregation of Revenue [Line Items]
Sales									$ 34,340	$ 33,996	$ 29,850

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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