Ecovyst, Inc. Quarterly report [Sections 13 or 15(d)]

Quarterly report [Sections 13 or 15(d)]

Stock-Based Compensation - Modifications (Details)

Stock-Based Compensation - Modifications (Details)	3 Months Ended
Stock-Based Compensation - Modifications (Details)	Mar. 31, 2026
Grants, 2025 \| Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Award requisite performance period (in years)	3 years

- 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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+ Details