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]

Cover
- Cover
- Audit Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Investments in Affiliated Companies - Narratives (Details)

v3.25.0.1

Investments in Affiliated Companies - Narratives (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 18, 2013
Business Acquisition
Amortization of investment in affiliate step-up	$ 3,761,000	$ 6,403,000	$ 6,402,000
Impairment of investment in affiliated companies	65,000,000	0	0
Accounts payable	43,928,000	40,195,000
Equity in net (income) from affiliated companies	(15,112,000)	(30,624,000)	(27,725,000)
Zeolyst Joint Venture
Business Acquisition
Amortization of investment in affiliate step-up		6,403,000	6,403,000
Impairment of investment in affiliated companies	65,000,000	0
Equity in net (income) from affiliated companies		(30,695,000)	(27,931,000)
Zeolyst Joint Venture \| Advanced Materials & Catalysts
Business Acquisition
Amortization of investment in affiliate step-up	3,761,000
Equity in net (income) from affiliated companies	(15,112,000)	(30,624,000)	(27,725,000)
Related Party
Business Acquisition
Accounts receivable, related parties	2,794,000	3,231,000
Accounts payable	929,000	1,351,000
Sales	3,811,000	2,457,000	5,915,000
Real estate tax abatement term (in years)				10 years
Real estate tax abatement				75.00%
Related Party \| Sales from Partnership to Company
Business Acquisition
Accounts receivable, related parties	2,794,000	3,164,000
Accounts payable	0	0
Purchases from related party	0	236,000	0
Business Combination
Business Acquisition
Net purchase accounting fair value adjustments	155,138,000	224,614,000
Amortization of investment in affiliate step-up	$ 3,761,000	$ 6,403,000	$ 6,402,000

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