Document and Entity Information |
Mar. 22, 2021 |
|---|---|
| Cover [Abstract] | |
| Amendment Flag | true |
| Entity Central Index Key | 0001708035 |
| Document Type | 8-K/A |
| Document Period End Date | Mar. 22, 2021 |
| Entity Registrant Name | Ecovyst Inc. |
| Entity File Number | 001-38221 |
| Entity Incorporation State Country Code | DE |
| Entity Tax Identification Number | 81-3406833 |
| Entity Address, Address Line One | 300 Lindenwood Drive |
| Entity Address, City or Town | Malvern |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19355 |
| City Area Code | (610) |
| Local Phone Number | 651-4400 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common stock, par value $0.01 per share |
| Trading Symbol | ECVT |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Amendment Description | This Current Report on Form 8-K/A is being filed as an amendment (the “Amendment No. 1”) to the Current Report on Form 8-K filed by PQ Group Holdings Inc., renamed Ecovyst Inc., (the “Company”) on March 23, 2021 with the Securities and Exchange Commission (the “Original Report”). This Amendment No. 1 is being filed to update the effective date of Michael Crews’s retirement as Executive Vice President and Chief Financial Officer of the Company and Michael Feehan’s transition to Vice President and Chief Financial Officer of the Company. Except as set forth herein, this Amendment No. 1 does not amend, modify or update the disclosure contained in the Original Report. |