CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other comprehensive income (loss), net of tax:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 73,697	$ (139,616)	$ (281,704)
Pension and postretirement benefits	(2,676)	9,530	1,710
Net gain from hedging activities	24,382	2,914	1,177
Foreign currency translation	(9,922)	(2,248)	(4,467)
Total other comprehensive income (loss)	11,784	10,196	(1,580)
Comprehensive income (loss)	85,481	(129,420)	(283,284)
Less: Comprehensive income (loss) attributable to noncontrolling interests	0	333	(4,596)
Comprehensive income (loss) attributable to Ecovyst Inc.	$ 85,481	$ (129,753)	$ (278,688)