Ecovyst, Inc. Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments - Cash Flow Hedge Impact on Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivative
Interest Expense	$ (11,811)	$ (9,542)	$ (30,812)	$ (26,880)
Gain (loss) on cash flow hedging relationships \| Amount of loss reclassified from AOCI into income
Derivative
Interest Expense	$ 6,048	$ (29)	$ 17,933	$ (627)

Amount of the cost of borrowed funds accounted for as interest expense.