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

Financial Instruments - Narrative (Details)

v3.25.0.1

Financial Instruments - Narrative (Details) $ in Thousands	12 Months Ended
Financial Instruments - Narrative (Details) $ in Thousands	Dec. 31, 2024 USD ($) derivative	Nov. 30, 2025 USD ($)
Derivative [Line Items]
Derivative, number of instruments in effect \| derivative	3
Gain (loss) to be reclassified within twelve months	$ (6,893)
Number of instruments \| derivative	4
Cash flow hedging
Derivative [Line Items]
Notional amount	$ 625,000
Derivative, cap interest rate	1.00%
Cash flow hedging \| Interest Rate Cap One
Derivative [Line Items]
Notional amount	$ 250,000
Cash flow hedging \| Interest Rate Cap Two
Derivative [Line Items]
Notional amount	175,000
Cash flow hedging \| Interest Rate Cap Three Period One
Derivative [Line Items]
Notional amount	150,000
Cash flow hedging \| Interest Rate Cap Three Period Two
Derivative [Line Items]
Notional amount	200,000
Cash flow hedging \| Interest Rate Cap Three Period Two \| Forecast
Derivative [Line Items]
Notional amount		$ 450,000
Cash flow hedging \| Interest Cap Four
Derivative [Line Items]
Notional amount	$ 200,000

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