Ecovyst (ECVT) 10-K 28 Feb 23 2022 FY Annual report Financial data

Cover

Cover - USD ($)	12 Months Ended
	Dec. 31, 2022	Feb. 23, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Document Transition Report	false
Entity File Number	001-38221
Entity Registrant Name	Ecovyst Inc.
Entity Incorporation, State or 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	(484)
Local Phone Number	617-1200
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	ECVT
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 647,733,853
Entity Common Stock, Shares Outstanding		123,194,080
Entity Central Index Key	0001708035
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2022
Audit Information [Abstract]
Auditor Firm ID	238
Auditor Name	PricewaterhouseCoopers LLP
Auditor Location	Philadelphia, Pennsylvania

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Sales	$ 820,159	$ 611,201	$ 495,920
Cost of goods sold	595,529	434,540	344,967
Gross profit	224,630	176,661	150,953
Selling, general and administrative expenses	85,334	97,781	81,545
Other operating expense, net	34,911	24,273	17,842
Operating income	104,385	54,607	51,566
Equity in net income from affiliated companies	(27,725)	(27,737)	(21,065)
Interest expense, net	37,217	36,990	50,409
Debt extinguishment costs	0	26,902	25,028
Other expense (income), net	158	4,511	(5,021)
Income from continuing operations before income taxes and noncontrolling interest	94,735	13,941	2,215
Provision (benefit) for income taxes	24,940	12,147	(52,065)
Net income from continuing operations	69,795	1,794	54,280
Net income (loss) from discontinued operations, net of tax	3,902	(141,410)	(335,984)
Net income (loss)	73,697	(139,616)	(281,704)
Less: Net income (loss) attributable to the noncontrolling interest - discontinued operations	0	333	(2,933)
Net income (loss) attributable to Ecovyst Inc.	73,697	(139,949)	(278,771)
Income from continuing operations attributable to Ecovyst Inc.	69,795	1,794	54,280
Income (loss) from discontinued operations attributable to Ecovyst Inc.	$ 3,902	$ (141,743)	$ (333,051)
Net income (loss) per share:
Basic income per share—continuing operations	$ 0.52	$ 0.01	$ 0.40
Diluted income per share—continuing operations	0.52	0.01	0.40
Basic income (loss) per share—discontinued operations	0.03	(1.04)	(2.46)
Diluted income (loss) per share—discontinued operations	0.03	(1.03)	(2.44)
Basic income (loss) per share	0.55	(1.03)	(2.06)
Diluted income (loss) per share	$ 0.55	$ (1.02)	$ (2.04)
Weighted average shares outstanding:
Basic (shares)	133,601,322	136,167,384	135,528,977
Diluted (shares)	135,088,172	137,708,931	136,450,953

CONSOLIDATED STATEMENTS OF COMP

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)

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
ASSETS
Cash and cash equivalents	$ 110,920	$ 140,889
Accounts receivable, net	74,758	80,802
Inventories, net	44,362	53,813
Derivative assets	18,510	0
Prepaid and other current assets	19,154	16,165
Total current assets	267,704	291,669
Investments in affiliated companies	436,013	446,074
Property, plant and equipment, net	584,889	596,231
Goodwill	403,163	406,139
Other intangible assets, net	129,932	145,617
Right-of-use lease assets	28,265	30,115
Other long-term assets	34,587	15,374
Total assets	1,884,553	1,931,219
LIABILITIES
Current maturities of long-term debt	9,000	9,000
Accounts payable	40,019	51,860
Operating lease liabilities—current	8,155	8,306
Accrued liabilities	72,229	75,915
Total current liabilities	129,403	145,081
Long-term debt, excluding current portion	865,870	872,839
Deferred income taxes	136,184	126,749
Operating lease liabilities—noncurrent	20,021	21,719
Other long-term liabilities	25,846	24,094
Total liabilities	1,177,324	1,190,482
Commitments and contingencies (Note 25)
EQUITY
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	450,000,000	450,000,000
Common stock, shares issued (shares)	139,571,272	137,820,971
Common stock, shares outstanding (shares)	122,186,238	136,938,758
Common Stock, Value, Issued	$ 1,396	$ 1,378
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (shares)	50,000,000	50,000,000
Preferred stock, shares issued (shares)	0	0
Preferred stock, shares outstanding (shares)	0	0
Preferred Stock, Value, Issued	$ 0	$ 0
Additional paid-in capital	1,091,475	1,073,409
Accumulated deficit	$ (242,010)	$ (315,707)
Treasury stock (shares)	17,385,034	882,213
Treasury Stock, Value	$ (149,624)	$ (12,551)
Accumulated other comprehensive (loss) income	5,992	(5,792)
Total equity	707,229	740,737
Total liabilities and equity	$ 1,884,553	$ 1,931,219

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common stock	Additional paid-in capital	Retained earnings (accumulated deficit)	Treasury stock, at cost	Accumulated other comprehensive income (loss)	Non-controlling interest
Beginning balance, shares at Dec. 31, 2019		136,861,382			(396,421)
Beginning balance, value at Dec. 31, 2019	$ 1,785,318	$ 1,369	$ 1,696,899	$ 103,013	$ (6,483)	$ (15,348)	$ 5,868
Increase (Decrease) in Stockholders' Equity
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(281,704)			(278,771)			(2,933)
Other comprehensive income (loss)	(1,580)					83	(1,663)
Repurchases of common shares, shares					(211,700)
Repurchases of common shares, value	(2,059)				$ (2,059)
Tax withholding on equity award vesting, shares					(175,465)
Tax withholdings on equity award vesting, value	(2,539)				$ (2,539)
Distributions to noncontrolling interests	(1,219)						(1,219)
Dividends paid on common stock	243,749		243,749
Stock compensation expense	24,366		24,366
Shares issued under equity incentive plan, net of forfeitures, shares		240,761
Shares issued under equity incentive plan, net of forfeitures, value	345	$ 2	343
Ending balance, shares at Dec. 31, 2020		137,102,143			(783,586)
Ending balance, value at Dec. 31, 2020	1,277,179	$ 1,371	1,477,859	(175,758)	$ (11,081)	(15,265)	53
Increase (Decrease) in Stockholders' Equity
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(139,616)			(139,949)			333
Other comprehensive income (loss)	10,196					9,473	723
Tax withholding on equity award vesting, shares					(98,627)
Tax withholdings on equity award vesting, value	(1,470)				$ (1,470)
Distributions to noncontrolling interests	(1,109)						(1,109)
Dividends paid on common stock	435,593		435,593
Stock compensation expense	30,404		30,404
Shares issued under equity incentive plan, net of forfeitures, shares		718,828
Shares issued under equity incentive plan, net of forfeitures, value	746	$ 7	739
Ending balance, shares at Dec. 31, 2021		137,820,971			(882,213)
Ending balance, value at Dec. 31, 2021	740,737	$ 1,378	1,073,409	(315,707)	$ (12,551)	(5,792)	0
Increase (Decrease) in Stockholders' Equity
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	73,697			73,697			0
Other comprehensive income (loss)	11,784					11,784	0
Repurchases of common shares, shares					(16,470,763)
Repurchases of common shares, value	(136,741)				$ (136,741)
Tax withholding on equity award vesting, shares					(32,058)
Tax withholdings on equity award vesting, value	(332)				$ (332)
Stock compensation expense	17,469		17,469
Shares issued under equity incentive plan, net of forfeitures, shares		1,750,301
Shares issued under equity incentive plan, net of forfeitures, value	615	$ 18	597
Ending balance, shares at Dec. 31, 2022		139,571,272			(17,385,034)
Ending balance, value at Dec. 31, 2022	$ 707,229	$ 1,396	$ 1,091,475	$ (242,010)	$ (149,624)	$ 5,992	$ 0

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Cash flows from operating activities:
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 73,697	$ (139,616)	$ (281,704)
Net loss (income) from discontinued operations	(3,902)	141,410	335,984
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	65,121	65,955	65,333
Amortization	14,042	13,786	11,593
Amortization of deferred financing costs and original issue discount	2,031	1,907	2,515
Debt extinguishment costs	0	21,166	22,658
Foreign currency exchange loss (gain)	978	4,716	(5,264)
Pension and postretirement healthcare (benefit) expense	(1,015)	(302)	416
Pension and postretirement healthcare benefit funding	0	0	(3,264)
Deferred income tax (benefit) provision	1,652	4,548	(60,060)
Net loss on asset disposals	3,594	5,666	4,722
Stock compensation	20,632	31,838	17,194
Equity in net income from affiliated companies	(27,725)	(27,737)	(21,065)
Dividends received from affiliated companies	35,000	35,000	40,000
Other, net	(1,645)	(2,930)	(3,478)
Working capital changes that provided (used) cash, excluding the effect of acquisitions and dispositions:
Receivables	5,503	(33,476)	6,971
Inventories	9,902	631	(2,976)
Prepaids and other current assets	5	(7,827)	(1,359)
Accounts payable	(10,127)	10,006	6,868
Accrued liabilities	(7,448)	12,597	5,015
Net cash provided by operating activities, continuing operations	180,295	137,338	140,099
Net cash provided by (used in) operating activities, discontinued operations	6,311	(7,420)	83,499
Net cash provided by operating activities	186,606	129,918	223,598
Cash flows from investing activities:
Purchases of property, plant and equipment	(58,870)	(60,045)	(54,837)
Proceeds from business divestitures, net of cash	0	978,449	624,256
Payments for business divestiture	(3,744)	0	0
Proceeds from sale of assets	0	0	2,375
Business combinations, net of cash acquired	(488)	(42,639)	0
Other, net	81	(12)	0
Net cash (used in) provided by investing activities, continuing operations	(63,021)	875,753	571,794
Net cash used in investing activities, discontinued operations	0	(40,021)	(20,322)
Net cash (used in) provided by investing activities	(63,021)	835,732	551,472
Cash flows from financing activities:
Draw down of revolving credit facilities	0	0	126,500
Repayments of revolving credit facilities	0	0	(126,500)
Issuance of long-term debt, net of original issue discount and financing fees	0	897,750	640,340
Debt issuance costs	0	(1,293)	(8,987)
Repayments of long-term debt	(9,000)	(1,430,863)	(1,091,134)
Debt prepayment fees	0	(8,481)	(10,550)
Proceeds from financing obligation	0	16,005	0
Dividends paid to stockholders	0	435,593	243,749
Repurchases of common shares	(136,741)	0	(2,059)
Tax withholdings on equity award vesting	(332)	(1,470)	(2,539)
Proceeds from stock options exercised	611	746	373
Repayments of financing obligation	(2,692)	(1,435)	0
Other, net	(32)	1,545	(1,875)
Net cash used in financing activities, continuing operations	(148,186)	(963,089)	(720,180)
Net cash used in financing activities, discontinued operations	0	(1,144)	(2,640)
Net cash used in financing activities	(148,186)	(964,233)	(722,820)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(5,368)	2,253	11,052
Net change in cash, cash equivalents and restricted cash	(29,969)	3,670	63,302
Cash, cash equivalents and restricted cash at beginning of period	140,889	137,219	73,917
Cash, cash equivalents and restricted cash at end of period	110,920	140,889	137,219
Less: cash, cash equivalents and restricted cash of discontinued operations	0	0	(22,202)
Cash, cash equivalents and restricted cash at end of period of continuing operations	$ 110,920	$ 140,889	$ 115,017

CONSOLIDATED STATEMENTS OF ST_2

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]
Dividends paid on common stock (in dollars per share)	$ 3.20	$ 1.80

Background and Basis of Present

Background and Basis of Presentation	12 Months Ended
	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Background and Basis of Presentation	1. Background and Basis of Presentation: Description of Business Ecovyst Inc. and subsidiaries (the “Company” or “Ecovyst”) is a leading integrated and innovative global provider of specialty catalysts and services. The Company supports customers globally through its strategically located network of manufacturing facilities. The Company believes that its products, which are predominantly inorganic, and services contribute to improving the sustainability of the environment. Basis of Presentation On December 14, 2020, the Company completed the sale of its Performance Materials business for $650,000 and on August 1, 2021, completed the sale of its Performance Chemicals business for $1,100,000. T he financial results of these business are presented as discontinued operations in the consolidated financial statements for the 2021 and 2020 periods presented. See Note 4 and Note 5 for more information on these transactions. The Company has two uniquely positioned specialty businesses: Ecoservices provides sulfuric acid recycling to the North American refining industry for the production of alkylate and provides on-purpose virgin sulfuric acid for water treatment, mining, and industrial applications; and Catalyst Technologies provides finished silica catalysts and catalyst supports necessary to produce high strength and high stiffness plastics and, through its Zeolyst joint venture, supplies zeolites used for catalysts that help produce renewable fuels, remove nitric oxide from diesel engine emissions as well as sulfur from fuels during the refining process. The Company’s regeneration services product group, which is a part of the Company’s Ecoservices segment, typically experiences seasonal fluctuations as a result of higher demand for gasoline products in the summer months and lower demand in the winter months. These demand fluctuations result in higher sales and working capital requirements in the second and third quarters. The notes to the consolidated financial statements, unless otherwise indicated, are on a continuing operations basis.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies: Principles of Consolidation. The consolidated financial statements include the accounts of the Company and its controlled subsidiaries. Investments in affiliated companies are recorded at cost plus the Company’s equity in their undistributed earnings. All intercompany transactions have been eliminated. Foreign Currency Translation. All assets and liabilities of foreign subsidiaries and affiliated companies are translated to U.S. dollars using exchange rates in effect at the balance sheet date. Adjustments resulting from translation of the balance sheets are included in stockholders’ equity as part of accumulated other comprehensive income (loss). Adjustments resulting from translation of certain intercompany loans, which are not considered permanent and are denominated in foreign currencies, are included in other expense (income), net in the consolidated statements of income. The Company considers intercompany loans to be of a permanent or long-term nature if management expects and intends that the loans will not be repaid. For the years ended December 31, 2022, 2021 and 2020, all intercompany loan arrangements were determined to be non-permanent based on management’s intention as well as actual lending and repayment activity. Therefore, the foreign currency transaction gains or losses associated with the int ercompany loans were recorded in the consolidated statements of income for the years ended December 31, 2022, 2021 and 2020. Income and expense items are translated at average exchange rates during the year. Net foreign currency exchange (gains) and losses included in other expense (income), net were $978, $4,716 and $(5,264) for the years ended December 31, 2022, 2021 and 2020 , respectively. The n et foreign currency (gains) and losses realized during these years were primarily driven by the non-permanent intercompany debt denominated in local currency and translated to U.S. dollars. Cash and Cash Equivalents. Cash and cash equivalents include highly liquid investments with original terms to maturity of 90 days or less from the time of purchase. Restricted Cash. Restricted cash, which is restricted as to withdrawal or usage, is classified separately from cash and cash equivalents on the Company’s consolidated balance sheets. The Company had no restricted cash balances as of December 31, 2022 and 2021. Accounts Receivable and Allowance for Credit Losses. Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The allowance for credit losses is the Company’s best estimate of the amount of probable credit losses in its existing accounts receivable and is reviewed during each reporting period over their contractual life. The Company recognizes an allowance for credit losses based on historical collection experience, current regional economic and market conditions, the aging of accounts receivable and assessments of current creditworthiness of customers. Account balances are charged against the allowance when the Company believes it is probable that the associated receivables will not be recovered. If the financial condition of the Company’s customers were to deteriorate resulting in an impairment of their ability to make payments, additional allowances may be required. The Company does not have any off-balance sheet credit exposure related to its customers. The Company’s allowance for credit losses was not material as of December 31, 2022 and 2021. Inventories. Certain domestic inventories are stated at the lower of cost or market and valued using the last-in, first-out (“LIFO”) method. All other inventories are stated at the lower of cost or net realizable value and valued using the weighted average cost or first-in, first-out (“FIFO”) methods. Property, Plant and Equipment. Property, plant and equipment are carried at cost and include expenditures for new facilities, major renewals and betterments. The Company capitalizes the cost of furnace rebuilds as part of property, plant and equipment. Maintenance, repairs and minor renewals are charged to expense as incurred. The Company capitalizes certain internal costs associated with the implementation of purchased software. When property, plant and equipment is retired or otherwise disposed of, the net carrying amount is eliminated with any gain or loss on disposition recognized in earnings at that time. Depreciation is provided on the straight-line method based on the estimated useful lives of the assets, which generally range from 15 to 33 years for buildings and improvements and 3 to 10 years for machinery and equipment. Leasehold improvements are depreciated using the straight-line method based on the shorter of the useful life of the improvement or remaining lease term. The Company capitalizes the interest cost associated with the development and construction of significant new plant and equipment and depreciates that amount over the lives of the related assets. Capitalized interest recorded during the years ended December 31, 2022, 2021 and 2020 was $1,442, $1,235 and $1,788, respectively. Lea ses . The Company has operating and finance lease agreements with remaining lease terms as of December 31, 2022 of up to 23 years, including leases of land, buildings, railcars, vehicles, manufacturing equipment and general office equipment. Some leases include options to terminate or extend for one or more years. These options are incorporated in the Compan y’s lease term when it is reasonably certain that the option will be exercised. Some leases include options to purchase, which the Company assesses under the guidance to determine if these leases should be classified as finance lease agreements. When the Company enters into an arrangement, at inception, the Company determines if the arrangement contains a lease and whether that lease meets the classification criteria of a finance or operating lease. Some of the Company’s lease arrangements contain lease components (e.g. minimum rent payments) and non-lease components (e.g. maintenance). The Company accounts for the lease and non-lease components separately based on the estimated standalone price of each component. Certain of the Company’s lease agreements include rental payments that are adjusted periodically for an index or rate and these are initially measured using the index or rate in effect at the commencement date. Variable lease expense is recognized in the period in which the obligation for those payments is incurred. The Company’s lease agreements do not contain any material residual value guarantees or material restrictive covenants. The Company recognizes a right-of-use lease asset and lease liability at the lease commencement date based on the present value of the remaining lease payments over the lease term. The Company assesses its leasing arrangements to determine the rate implicit in the lease arrangement. Historically, the Company’s leasing arrangements do not contain the information necessary to determine the rate implicit in the lease. As such, the Company utilizes its incremental borrowing rate over the relevant lease term, which is the rate of interest that it would have to pay to borrow on a collateralized basis over a similar term an amount equal to the lease payments in a similar economic environment. The incremental borrowing rate is determined at the lease commencement date and is developed utilizing a readily available market interest rate curve adjusted for the Company’s credit quality. The Company has elected to use a portfolio approach to apply its incremental borrowing rate to individual leases based on lease term and geographic jurisdiction. Short-term leases, which have an initial term of twelve months or less, are not recorded on the Company’s balance sheet. Lease expense for operating leases is recognized on a straight-line basis over the lease term. Lease expense for financing leases is bifurcated into two components, with the amortization expense component of the right-of-use asset recognized on a straight-line basis and the interest expense component recognized using the effective interest method over the lease term. The amortization expense component of the right-of-use lease asset is included in cost of goods sold and in selling, general and administrative expenses and the interest expense component is included in interest expense, net on the consolidated statements of income. Spare Parts. Spare parts are maintained by the Company’s facilities to keep machinery and equipment in working order. Spare parts are capitalized and included in other long-term assets. Spare parts are measured at cost and are not depreciated or expensed until utilized; however, reserves may be provided on aged spare parts. When a spare part is utilized as part of an improvement to property, plant and equipment, the carrying value is depreciated over the applicable life once placed in service. Otherwise, the spare part is expensed and charged as a cost of production when utilized. Investments in Affiliated Companies. Investments in affiliated companies are accounted for using the equity method of accounting if the investment provides the Company with the ability to exercise significant influence, but not control, over the investee. Significant influence is generally deemed to exist if the Company’s ownership interest in the voting stock of the investee ranges between 20% and 50%, although other factors, such as representation on the investee’s board of directors and the impact of commercial arrangements, are considered in determining whether the equity method of accounting is appropriate. Under the equity method of accounting, the investments in equity-method investees are recorded in the consolidated balance sheets as investments in affiliated companies, and the Company’s share of the investees’ earnings or losses, together with other than temporary impairments in value, is recorded as equity in net income from affiliated companies in the consolidated statements of income. Any differences between the Company’s cost of an equity method investment and the underlying equity in the net assets of the investment, such as fair value step-ups resulting from acquisitions, are accounted for according to their nature and impact the amounts recognized as equity in net income from affiliated companies in the consolidated statements of income. The Company evaluates all distributions received from its equity method investments using the nature of distribution approach. Under this approach, the Company evaluates the nature of activities of the investee that generated the distribution. The distributions received are either classified as a return on investment, which is presented as a component of operating activities on the Company’s consolidated statements of cash flows, or as a return of investment, which is presented as a component of investing activities on the Company’s consolidated statements of cash flows. The Company evaluates its equity method investments for impairment whenever events or changes in circumstances indicate that the carrying amounts of such investments may be impaired. If a decline in the value of an equity method investment is determined to be other than temporary, a loss is recorded in earnings in the current period. Goodwill and Intangible Assets. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. The Company is required to test goodwill associated with each of its reporting units for impairment at least annually and whenever events or circumstances indicate that it is more likely than not that goodwill may be impaired. The Company performs its annual goodwill impairment test as of October 1. Goodwill is tested for impairment at the reporting unit level. In performing tests for goodwill impairment, the Company is able to use its discretion to first perform an optional qualitative assessment about the likelihood of the carrying value of a reporting unit exceeding its fair value. The qualitative assessment need not be applied to all reporting units. If the Company determines that it is more likely than not that the fair value of a reporting unit is less than its carrying amount based on the qualitative assessment, the Company will perform a quantitative goodwill impairment test to identify the potential goodwill impairment and measure the amount of the goodwill impairment loss, if any, to be recognized for that reporting unit. For the annual assessments in 2022 and 2021, the Company bypassed the option to perform the qualitative assessment and proceeded directly to performing the quantitative goodwill impairment test for each of its reporting units. The quantitative test identifies both the potential existence of impairment and the amount of impairment loss. In applying the quantitative test, the Company calculates and compares the reporting unit’s estimated fair value to its carrying value, including goodwill. If the fair value of a reporting unit exceeds its carrying value, goodwill is not impaired. If the carrying value of a reporting unit exceeds its fair value, an impairment loss is recognized for the amount by which the carrying value exceeds the reporting unit’s fair value. An impairment loss cannot exceed the carrying value of goodwill assigned to a reporting unit and the loss establishes a new basis in the goodwill. Subsequent reversal of an impairment loss is not permitted. For intangible assets other than goodwill, definite-lived intangible assets are amortized over their respective estimated useful lives. Intangible assets with indefinite lives are not amortized, but rather are tested for impairment at least annually or more frequently if events occur or circumstances change that would more likely than not reduce the fair value of the intangible asset below its carrying amount. The Company tests its indefinite-lived intangible assets as of October 1 of each year in conjunction with its annual goodwill impairment test. Impairment Assessment of Long-Lived Assets. The Company performs an impairment review of property, plant and equipment and definite-lived intangible assets when facts and circumstances indicate that the carrying value of an asset or asset group may not be recoverable from its undiscounted future cash flows. When evaluating long-lived assets for impairment, if the carrying amount of an asset or asset group is found not to be recoverable, a potential impairment loss may be recognized. An impairment loss is measured by comparing the carrying amount of the asset or asset group to its fair value. Fair value is determined using quoted market prices when available, or other techniques including discounted cash flows. The Company’s estimates of future cash flows involve assumptions concerning future operating performance, economic conditions and technological changes that may affect the future useful lives of the assets. Derivative Financial Instruments. The Company utilizes certain derivative financial instruments to enhance its ability to manage risk, including exposure to interest rate fluctuations that exist as part of ongoing business operations. Derivative instruments are entered into for periods consistent with the related underlying exposures and do not constitute positions independent of those exposures. All derivatives designated as hedges are recognized on the consolidated balance sheets at fair value. The Company may designate a derivative as a hedge of the fair value of a recognized asset or liability or of an unrecognized firm commitment (fair value hedge), a hedge of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (cash flow hedge), a foreign currency fair-value or cash-flow hedge (foreign currency hedge), or a hedge of a net investment in a foreign operation (net investment hedge). The Company’s hedging strategies include derivatives designated as cash flow hedges and net investment hedges. Changes in the fair value of a derivative that is highly effective and that is designated and qualifies as a cash flow hedge are recorded in other comprehensive income and subsequently reclassified into earnings in the same period(s) in which the hedged transaction affects earnings. Changes in the fair value of a derivative that is highly effective and that is designated and qualifies as a hedge of a net investment in a foreign operation are recorded in the foreign currency translation adjustment account within accumulated other comprehensive income, where the associated gains and losses will remain until such time that the hedged net investment (foreign subsidiary) is sold or liquidated. Changes in the fair value of a derivative that is not designated or does not qualify as a hedge are recorded in the consolidated statements of income. Cash flows from derivative instruments are reported in the same cash flow category as the cash flows from the items being hedged. The Company formally documents all relationships between hedging instruments and hedged items, as well as its risk-management objective and strategy for undertaking various hedge transactions. The Company also formally assesses whether each hedging relationship is highly effective in achieving offsetting changes in fair values or cash flows of the hedged item during the period, both at the inception of the hedge and on an ongoing basis. If it is determined that a derivative is not highly effective as a hedge, or if a derivative ceases to be a highly-effective hedge, hedge accounting is discontinued with respect to that derivative prospectively. Fair Value Measurements. The Company measures fair value using the guidelines under U.S. generally accepted accounting principles (“GAAP”). An asset’s fair value is defined as the price at which the asset could be exchanged in a current transaction between market participants. A liability’s fair value is defined as the amount that would be paid to transfer the liability to a market participant, not the amount that would be paid to settle the liability with the creditor. The carrying values of cash, accounts receivable, accounts payable and accrued liabilities approximate fair value due to the short-term nature of these items. See Note 8 to these consolidated financial statements regarding the application of fair value measurements and Note 18 regarding the fair value of debt. Treasury Stock. The Company records repurchases of its common stock for treasury at cost. Upon the reissuance of the Company’s common stock from treasury, differences between the proceeds from reissuance and the average cost of the treasury stock are credited or charged to capital in excess of par value to the extent of prior credits related to the reissuance of treasury stock. If no such credits exist, the differences are charged to retained earnings. See Note 9 of these consolidated financial statements regarding the Company’s treasury stock repurchases. Revenue Recognition. In determining the appropriate amount of revenue to be recognized as the Company fulfills its obligations under its agreements, the Company performs the following steps: (i) identification of the contract with the customer; (ii) determination of whether the promised goods or services are performance obligations, including whether they are distinct in the context of the contract; (iii) measurement of the transaction price; (iv) allocation of the transaction price to the performance obligations based on estimated selling prices; and (v) recognition of revenue when (or as) the Company satisfies each performance obligation. The Company identifies a contract when an agreement with a customer creates legally enforceable rights and obligations, which occurs when a contract has been approved by both parties, the parties are committed to perform their respective obligations, each party’s rights and payment terms are clearly identified, commercial substance exists and it is probable that the Company will collect the consideration to which it is entitled. The Company may offer rebates to customers who have reached a specified volume of optional purchases. The Company recognizes rebates given to customers as a reduction of revenue based on an allocation of the cost of honoring rebates earned and claimed to each of the underlying revenue transactions that result in progress by the customer toward earning the rebate. Rebates are recognized at the time revenue is recorded. The Company measures the rebate obligation based on the estimated amount of sales that will result in a rebate at the adjusted sales price per the respective sales agreement. Shipping and Handling. Amounts billed to a customer in a sale transaction related to shipping and handling, if any, represent revenues earned for the goods provided and are classified as revenue. Costs related to shipping and handling of products shipped to customers are classified as cost of goods sold. See Note 7 of these consolidated financial statements for disclosures regarding the recognition of revenue for shipping and handling costs that are billed to customers. Research and Development. Research and development costs of $7,232, $7,499 and $7,137 for the years ended December 31, 2022, 2021 and 2020, respectively, were expensed as incurred and reported in selling, general and administrative expenses in the consolidated statements of income. Income Taxes. The Company operates within multiple taxing jurisdictions and is subject to tax filing requirements and potential audits within these jurisdictions. The Company uses the asset and liability method in accounting for income taxes. Deferred tax assets and liabilities are recorded for temporary differences between the tax basis of assets and liabilities and their reported amounts in the financial statements, using statutory tax rates in effect for the year in which the differences are expected to reverse. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the results of operations in the period that includes the enactment date. The Company evaluates its deferred tax assets each period to ensure that estimated future taxable income will be sufficient in character (e.g., capital gain versus ordinary income treatment), amount and timing, to result in their realizability. A valuation allowance is recorded to reduce the carrying amounts of deferred tax assets, unless it is more likely than not that those assets will be realized. Generally, APB 23 of ASC Topic 740, Income Taxes (“ASC 740”), provides guidance with respect to establishing deferred income taxes on earnings from foreign subsidiaries, to the extent that these earnings are considered to be available for repatriation. Further, ASC 740-30 requires that deferred taxes be established with respect to the earnings of a foreign subsidiary, unless existing tax law provides a means by which the investment in a subsidiary can be recovered tax-free. The Company has determined that it is able to repatriate the non-permanently reinvested earnings of its foreign subsidiaries in a tax-free manner. As such, the Company is able to asset, for purposes of ASC 740-30, that no deferred income taxes are needed with respect to earnings from foreign subsidiaries. The Company recognizes a financial statement benefit for positions taken for tax return purposes when it will be more likely than not (i.e. greater than 50%) that the positions will be sustained upon tax examination, based solely on the technical merits of the tax positions. Otherwise, no tax benefit is recognized. The tax benefits recognized are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. The Company recognizes potential accrued interest and penalties related to unrecognized tax benefits as a component of income tax expense. Tax examinations are often complex as tax authorities may disagree with the treatment of items reported by the Company and may require several years to resolve. These accrued liabilities represent a provision for taxes that are reasonably expected to be incurred on the basis of available information but which are not certain. Environmental Expenditures. Environmental expenditures that pertain to current operations or to future revenues are expensed or capitalized consistent with the Company’s capitalization policy for property, plant and equipment. Expenditures that result from the remediation of an existing condition caused by past operations and that do not contribute to current or future revenues are expensed. Liabilities are recognized for remedial activities when the remediation is probable and the cost can be reasonably estimated. Recoveries of expenditures for environmental remediation are recognized as assets only when recovery is deemed probable. See Note 25 to these consolidated financial statements regarding commitments and contingencies. Deferred Financing Costs. Financing costs incurred in connection with the issuance of long-term debt are deferred and presented as a direct reduction from the related debt instruments on the Company’s consolidated balance sheets. Deferred financing costs are amortized as interest expense using the effective interest method over the respective terms of the associated debt instruments. Stock-Based Compensation. The Company applies the fair value based method to account for stock options, restricted stock awards, restricted stock units and performance stock units issued in connection with its equity incentive plans. Stock-based compensation expense is recognized on a straight-line basis over the vesting periods of the respective awards, and the Company accounts for forfeitures of equity incentive awards as they occur. In connection with the vesting of restricted stock awards, restricted stock units and performance stock units, shares of common stock may be delivered to the Company by employees to satisfy withholding tax obligations at the instruction of the employee award holders. These transactions when they occur are accounted for as stock repurchases by the Company, with the shares returned to treasury stock at a cost representing the payment by the Company of the tax obligations on behalf of the employees in lieu of shares for the vesting event. See Note 23 to these consolidated financial statements regarding compensation expense associated with the Company’s equity incentive awards. Pensions and Postretirement Benefits. The Company sponsors two funded defined benefit pension plans that cover certain employees. Benefits for the plans are generally based on average final pay and years of service. The Company’s funding policy is to fund the minimum required contributions consistent with statutory requirements based on actuarial computations utilizing the projected unit credit method of calculation. The pension plans’ assets include equity and fixed income securities. Certain assumptions are made regarding the occurrence of future events affecting pension costs, such as mortality, withdrawal, disa blement and retirement, changes in compensation and benefits, and discount rates to reflect the time value of money. The major elements in determining pension income and expense are pension liability discount rates and the expected return on plan assets. The Company references rates of return on high-quality, fixed income investments when estimating the discount rate, and the expected period over which payments will be made based upon historical experience. The long-term rate of return used to calculate the expected return on plan assets is the average rate of return estimated to be earned on invested funds for providing pension benefits. In addition to pension benefits, the Company provides certain health care benefits for employees who meet age, participation and length of service requirements at retirement. The Company uses explicit assumptions using the best estimates available of the plan’s future experience. Principal actuarial assumptions include: discount rates, present value factors, retirement age, participation rates, mortality rates, cost trend rates, Medicare reimbursement rates and per capita claims cost by age. Current interest rates as of the measurement date are used for discount rates in present value calculations. The Company also has defined contribution plans covering domestic employees of the Company and certain subsidiaries. Contingencies. Certain conditions may exist as of the date the financial statements are issued, which may result in a loss to the Company but which will only be resolved when one or more future events occur or fail to occur. The Company’s management and its legal counsel assess such contingent liabilities, and such assessment inherently involves an exercise of judgment. In assessing loss contingencies related to legal proceedings that are pending against the Company or unasserted claims that may result in such proceedings, the Company and legal counsel evaluate the perceived merits of any legal proceedings or unasserted claims as well as the perceived merits of the amount of relief sought or expected to be sought therein. If the assessment of a contingency indicates that it is probable that a loss has been incurred and the amount of the liability can be estimated, then the estimated liability is accrued in the Company’s financial statements. If the assessment indicates that a loss contingency is not probable, but is reasonably possible, or is probable but cannot be estimated, then the nature of the contingent liability, together with an estimate of the range of possible loss if determinable and material, would be disclosed. Loss contingencies considered remote are generally not disclosed unless they involve guarantees, in which case the nature of the guarantee would be disclosed, including the approximate term, how the guarantee arose, and the events or circumstances that would require the guarantor to perform under the guarantee. Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Reclassification and Correction of an Error. Certain reclassifications and correction of an error have been made to the historical presentation of the consolidated financial statements and the notes accompanying the consolidated financial statements. During the preparation of the condensed consolidated financial statements for the period ended September 30, 2022, the Company identified a presentation error in the condensed consolidated statements of comprehensive income for the 2021 comparable periods presented. The presentation of comprehensive income (loss) inadvertently omitted the release of accumulated other comprehensive income (loss) related to foreign currency translation and deferred pension and postretirement benefit plan losses in conjunction with the sale of the Company’s Performance Chemicals business. The presentation of other comprehensive income (loss) for the year ended December 31, 2021, was corrected for the additional comprehensive loss of $9,123, of which $723 of comprehensive income was attributed to noncontrolling interest. This presentation error in other comprehensive income (loss) was also corrected for the year ended December 31, 2020, which resulted in additional comprehensive income of $13,835, of which $740 was attributed to noncontrolling interest. Additionally, Note 9 was corrected for this presentation error. The Company assessed the materiality of the error and concluded it was not material to the Company’s previously issued financial statements for the years ended December 31, 2021 and 2020. There was no impact on the consolidated statements of income, consolidated balance sheets and consolidated statements of cash flows for the years ended December 31, 2021 and 2020.

New Accounting Standards

New Accounting Standards	12 Months Ended
	Dec. 31, 2022
Accounting Standards Update and Change in Accounting Principle [Abstract]
Recently adopted accounting standards	3. New Accounting Standards: Recently Adopted Accounting Standards In November 2021, the Financial Accounting Standards Board (“FASB”) issued guidance that requires entities to provide certain disclosures when they (1) have received government assistance and (2) use a grant or contribution accounting model by analogy to other accounting guidance. Previously, there was no guidance under GAAP on recognizing or measuring government grants to business entities. The new guidance does not provide any additional guidance on this topic; rather, it only provides guidance on required disclosures for business entities that receive government assistance and apply another grant or contribution accounting framework by analogy. The new guidance is effective for fiscal years beginning after December 15, 2021, with early adoption permitted, and can be applied either prospectively or retrospectively. The Company adopted the new guidance as required on January 1, 2022; the Company has not identified any significant government assistance or grants subject to the scope of the guidance upon adoption. In March 2020 and January 2021, the FASB issued guidance to address certain accounting consequences from the anticipated transition from the use of the London Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates. The new guidance contains practical expedients for reference rate reform related activities that impact debt, leases, derivatives and other contracts. The guidance is optional and may be elected over time as reference rate reform activities occur. The time period through which the practical expedients provided in the guidance is available was set to expire on December 31, 2022, but was extended through December 31, 2024 by the FASB in December 2022. During the year ended December 31, 2020, the Company elected to apply the hedge accounting expedients related to probability and the assessments of effectiveness for future LIBOR-indexed cash flows to assume that the index upon which future hedged transactions will be based on matches the index of the corresponding derivatives. Application of these expedients preserves the presentation of derivatives consistent with past presentation. In February 2023, the Company amended the 2021 Term Loan Facility, the ABL Facility and all existing interest rate caps agreements to replace LIBOR with a secured overnight financing rate (“SOFR”) as the benchmark interest rate. See Notes 18 and 20 to these consolidated financial statements for additional information. The Company plans to utilize the practical expedients under the guidance with respect to the transition of its debt facilities and interest rate hedging arrangements to SOFR, with no material impact to its consolidated financial statements anticipated. Accounting Standards Not Yet Adopted as of December 31, 2022 In October 2021, the FASB issued guidance that requires contract assets and contract liabilities acquired in a business combination to be recognized and measured by the acquirer on the acquisition date in accordance with revenue recognition guidance. Under current GAAP, contract assets and contract liabilities acquired in a business combination are recorded by the acquirer at fair value. The new guidance creates an exception to the general recognition and measurement principles related to business combinations, and is expected to result in the acquirer recognizing contract assets and liabilities at the same amounts recorded by the acquiree. The new guidance is effective for business combinations occurring during fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, with early adoption permitted. The Company adopted the new guidance effective January 1, 2023 as required, and will apply the guidance prospectively to business combinations that occur after the adoption date.

Performance Materials Divestitu

Performance Materials Divestiture	12 Months Ended
	Dec. 31, 2022
Discontinued Operations and Disposal Groups [Abstract]
Performance Materials Divestiture	4. Performance Materials Divestiture: On December 14, 2020, the Company completed the sale of its Performance Materials business to Potters Buyer, LLC (the “Purchaser”), an affiliate of The Jordan Company, L.P., for a purchase price of $650,000. The net cash proceeds to the Company from the sale were $624,256 after certain customary adjustments for indebtedness, working capital and cash at the closing of the transaction. The Company classified the proceeds within net cash provided by (used in) investing activities – continuing operations in the consolidated statements of cash flows and used the net proceeds from the sale as well as cash on hand to pay down debt and issue a special cash dividend of $1.80 per share to stockholders. In the fourth quarter of 2020, the Performance Materials business met the criteria set forth in Accounting Standards Codification 205-20, Presentation of Financial Statements – Discontinued Operations (“ASC 205-20”), as the sale represents a strategic shift that will have a major effect on the Company’s operations and financial results. As a result, the Company’s consolidated financial statements for all periods presented reflect the Performance Materials business as a discontinued operation. The divested business was historically reported in the Performance Materials reportable segment, with the exception of certain Australian operations that were historically reported in the Performance Chemicals reportable segment. The total transaction costs incurred in connection with the sale were approximately $13,161 for the year ended December 31, 2020. The Company recorded a pre-tax loss on sale of $70,878, which is included in net (loss) income from discontinued operations, net of tax in the Company’s consolidated statements of income for the year ended December 31, 2020. The following is a reconciliation of the loss recorded on the sale: Net proceeds received from the sale of Performance Materials $ 624,256 Transaction costs (13,161) Net assets derecognized (681,973) Loss on sale of Performance Materials $ (70,878) In connection with the sale of Performance Materials and the related loss, as noted above, the Company has recognized a tax expense of $58,008 within d iscontinued operations for the year ended December 31, 2020. The following table summarizes the results of discontinued operations for the periods presented: Year ended 2020 Sales $ 342,738 Cost of goods sold 251,917 Selling, general and administrative expenses 33,195 Other operating expense, net 18,289 Operating income 39,337 Equity in net income from affiliated companies (37) Interest expense, net (1) 16,210 Other income, net (3,481) Loss on sale of Performance Materials 70,878 Loss from discontinued operations before income tax (44,233) Provision for income taxes 58,008 Loss from discontinued operations, net of tax $ (102,241) (1) The closing of the transaction triggered the Company’s obligation to provide partial repayment under both its Amended and Restated Term Loan Credit Agreement, dated May 4, 2016, and its New Term Loan Credit Agreement, dated as of July 22, 2020. As such, interest expense has been allocated to discontinued operations on the basis of the Company’s required refinancing of debt repayment provision of $275,787 of the 2018 Term Loan Facility and its required repayment of $188,722 of the 2020 Term Loan Facility. During the year ended December 31, 2021 , the Company incurred transaction costs of $2,054 and stock-based compensation expense of $1,970, and an associated tax benefit of $988 related to the Performance Materials divestiture, as well as a provision to return benefit of $5,429 related to the filing of the 2020 tax returns filed in the fourth quarter of 2021, which is included in loss from discontinued operations, net of tax. Net income attributable to the noncontrolling interest related to the Performance Materials business, net of tax was $265 for the year ended December 31, 2020. Upon the close of the transaction, the Company entered into a Transition Services Agreement with the Purchaser pursuant to which the Purchaser was receiving certain services to provide for the orderly transition of various functions and processes after the closing of the transaction. The services under the Transition Services Agreement include information technology, accounting, tax, financial services, human resources, facilities, and other administrative support services. These services were provided at cost for a period of nine The Company billed $3,314 under the Transition Services Agreement to the Purchaser during the year ended December 31, 2021. Those billings are included in selling, general and administrative expenses on the consolidated financial statements. Additionally, in connection with the transaction, the Company entered into various supply agreements with the Purchaser. Cash flows associated with these transition services and supply agreements were not material to the Company’s results of operations.

Performance Chemicals Divestitu

Performance Chemicals Divestiture	12 Months Ended
	Dec. 31, 2022
Discontinued Operations and Disposal Groups [Abstract]
Performance Chemicals Divestiture	5. Performance Chemicals Divestiture: On February 28, 2021, the Company entered into a definitive agreement to sell its Performance Chemicals business to Sparta Aggregator L.P. (the “Buyer”), a partnership established by Koch Minerals & Trading, LLC and Cerberus Capital Management, L.P. for a purchase price of $1,100,000 subject to certain adjustments including indebtedness, cash, working capital and transaction expenses. The Company completed the sale of its Performance Chemicals business effective on August 1, 2021. The net cash proceeds to the Company from the sale were $978,449 after certain customary adjustments for indebtedness, working capital and cash at the closing of the transaction. The Company classified the proceeds within net cash provided by (used in) investing activities – continuing operations in the consolidated statements of cash flows and used the net proceeds from the sale as well as cash on hand to pay down debt and issue a special cash dividend of $3.20 per share to stockholders. Prior to the closing of the transaction, the di sposal group was tested for recoverability as of each of the balance sheet dates since meeting the discontinued operations criteria, and the Company recognized an estimated disposal loss of $109,584 during the year ended December 31, 2021, which was included in net loss from discontinued operati ons, net of tax on the consolidated statements of income for the respective periods. During the year ended December 31, 2021, the Company incurred transaction costs of $35,402 and stock-based compensation expense of $5,691 in connection with the sale, which is included in loss from discontinued operations, net of tax. The final pre-tax loss on the sale of the Performance Chemicals business was $150,230, which is included in net (loss) income from discontinued operations, net of tax in the Company’s consolidated statements of income for the year ended December 31, 2021 . The following is a reconciliation of the loss recorded on the sale: Net proceeds received from the sale of the Performance Chemicals business $ 978,449 Transaction costs (35,402) Net assets derecognized (1,093,277) Loss on sale of the Performance Chemicals business $ (150,230) In connection with the sale of the Performance Chemicals business and the related loss, as noted above, the Company has recognized a tax benefit of $37,255 within net loss from discontinued operations, net of tax on the consolidated statement of income for the year ended December 31, 2021. During the year ended December 31, 2022, the Company recognized $3,902 of net income from discontinued operations, net of tax, related to the sale of the Performance Chemicals business for an income tax benefit upon the finalization of the Company’s U.S. income tax returns, partially offset by a tax indemnity claim resulting from the transaction. The following table summarizes the results of discontinued operations related to Performance Chemicals for the periods presented: Years ended 2022 2021 2020 Sales $ — $ 389,870 $ 614,704 Cost of goods sold — 284,220 492,302 Selling, general and administrative expenses — 29,856 43,749 Goodwill impairment charge — 75,080 260,000 Other operating expense, net (1) 2,409 14,765 33,144 Loss on sale of the Performance Chemicals business — 150,230 — Operating loss (2,409) (164,281) (214,491) Equity in net income from affiliated companies — (111) (172) Interest expense, net (2) — 10,730 16,570 Other income, net — (6,210) (1,089) Loss from discontinued operations before income tax (2,409) (168,690) (229,800) (Benefit) Provision for income taxes (6,311) (24,886) 3,943 Loss from discontinued operations, net of tax $ 3,902 $ (143,804) $ (233,743) (1) The Company reclassified transaction costs that were previously recorded to this line item and included those charges in the line item Loss on sale of the Performance Chemicals business during the years ended December 31, 2021 and 2020 . (2) Upon the close of the transaction, the Company used a portion of the net proceeds to repay a portion of its outstanding debt amounting to $526,363. Refer to Note 18 for additional details on the repayment of outstanding debt. Prior to the Company’s debt refinancing in June 2021, the Company’s outstanding term loan facilities had required refinancing of debt with repayment provisions. As a result, interest expense has been allocated to discontinued operations on the basis of the Company’s total repayment of $526,363. Net income (loss) attributable to the noncontrolling interest related to the Performance Chemicals business, net of tax was $333 and $(3,198) for the years ended December 31, 2021 and 2020, respectively. Net loss attributable to Ecovyst Inc., related to the Performance Chemicals business, net of tax was $(144,137) and $(230,545) for the years ended December 31, 2021 and 2020, respectively. In connection with the divestiture of the Performance Chemicals business, the Company entered into a five year contract manufacturing agreement effective on August 2, 2021 with PQ Silicas UK Ltd., a subsidiary of the Buyer, related to a facility in Warrington, United Kingdom. Pursuant to this agreement, the Buyer will manufacture and sell silica catalyst finished good products to the Company, which are finished good products sold within the Company’s Catalyst Technologies segment. Additionally, certain machinery, equipment, and other tangible personal property assets identified in the Agreement (“Catalyst Production Assets”) owned by the Buyer will be used exclusively in the manufacture of silica catalyst products for the Company. The Company did not meet the requirements for a sale-leaseback transaction as described in Accounting Standards Codification 842-40, Leases - Sale-Leaseback Transactions. Under the failed-sale-leaseback accounting model, the Company is deemed under GAAP to still own the Catalyst Production Assets, which the Company must continue to reflect in its consolidated balance sheet and depreciate over the assets’ remaining useful lives. For the year ended December 31, 2021 , the Company recorded a financing obligation of £11,648 (equivalent $16,005). The current portion of the obligation is included in accrued liabilities and the long-term portion in other long-term liabilities on the consolidated balance sheets. Based on the estimated fair market value of the Catalyst Production Assets, the failed-sale-leaseback accounting treatment resulted in an allocation of $16,005 of the cash proceeds from the sale to cash flows from financing activities in the consolidated statement of cash flows for the year ended December 31, 2021, due to the requirement to treat this portion of the proceeds as though it were the result of a financing obligation. The agreement has an initial term of five years, with an option to renew, as well as an “Option Bill of Sale” which provides for the transfer from the Buyer to the Company of the Catalyst Production Assets upon the Company’s exercise of a one-dollar purchase option. Payments made to the Buyer under the contact manufacturing agreement were $7,872 and $3,395 for the years ended December 31, 2022 and 2021, respectfully . In addition to the contract manufacturing agreement noted above, the Company also entered into certain supply agreements with the Buyer, as well as a Transition Services Agreement, pursuant to which the Buyer was receiving and performing certain services to provide for the orderly transition of various functions and processes after the closing of the transaction. The services under the Transition Services Agreement include information technology, accounting, tax, financial services, human resources, facilities, and other administrative support services. These services were provided for a period of six months, which ended in January 2022. Billings under the Transition Services Agreement to the Buyer during the years ended December 31, 2022 and 2021 were immaterial. T hose billings are included in selling, general and administrative expenses on the consolidated financial statements for the years ended December 31, 2022 and 2021 .

Acquisition

Acquisition	12 Months Ended
	Dec. 31, 2022
Business Combination and Asset Acquisition [Abstract]
Chem32 Acquisition	6. Acquisition: On March 1, 2021 (the “Closing Date”), the Company completed the acquisition of Chem32, LLC (“Chem32”) as part of a stock transaction (the “Acquisition”) for $44,000 in cash. Based in Orange, Texas, Chem32 is a leader in ex situ sulfiding and pre-activation for hydro-processing catalysts. The net cash paid by the Company was $42,639, after certain customary adjustments for indebtedness, working capital, cash and a holdback amount pursuant to the agreement. A portion of the holdback was settled in September 2022 for $488, with $512 of the holdback remaining as of December 31, 2022. Chem32 is reported as part of the Ecoservices segment. The Company’s consolidated financial statements include Chem32’s results of operations from the Closing Date through December 31, 2021. Net sales and net income attributable to Chem32 during this period are included in the Company’s consolidated statement of income for the year ended December 31, 2021 and totaled $14,419 and $4,755, respectively. Acquisition and integration costs were $1,235 for the year ended December 31, 2021 and are included in other operating expense, net in the Company’s consolidated statements of income. The Company believes that the Acquisition will offer a more robust portfolio of services within the refining industry by leveraging the Company’s existing relationships, therefore contributing to a total purchase price that resulted in the recognition of $14,778 of goodwill, which was deductible for tax purposes during the year ended December 31, 2021. The Acquisition was accounted for using the acquisition method of accounting. Under the acquisition method, the purchase price was allocated to the identifiable net assets acquired based on the fair values of the identifiable assets acquired and liabilities assumed as of the Closing Date. The excess of the purchase price over fair values of the identifiable net assets acquired was recorded to goodwill. During the year ended December 31, 2022, the Company recorded an immaterial adjustment between goodwill and deferred tax liabilities related to the final tax purchase price allocation. See Note 16 to these consolidated financial statements for further information. The following table sets forth the calculation and allocation of the purchase price to the identifiable net assets acquired with respect to the Acquisition, which was complete as of December 31, 2021: Purchase Cash paid, net of cash acquired $ 42,639 Holdback 1,000 Total consideration, net of cash acquired $ 43,639 Recognized amounts of identifiable assets acquired and liabilities assumed: Receivables $ 1,368 Inventories 204 Prepaid and other current assets 351 Property, plant and equipment 5,046 Other intangible assets 22,100 Other long-term assets 187 Fair value of assets acquired 29,256 Accounts payable 207 Accrued liabilities 188 Fair value of net assets acquired 28,861 Goodwill 14,778 $ 43,639 In accordance with the requirements of the purchase method of accounting for acquisitions, accounts receivable and inventories were recorded at fair market value. As of the Closing Date, the fair value of accounts receivable approximated historical cost. The gross contractual amount of accounts receivable at the Closing Date was $1,368, of which there was no amount deemed uncollectible. Fair value of inventory is defined as estimated selling prices less the sum of (a) costs of disposal and (b) a reasonable profit allowance for the selling effort of the acquiring entity, which the Company determined acquired cost equaled fair value of the inventory acquired. The valuation of the intangible assets acquired and the related weighted-average amortization periods were as follows: Amount Weighted-Average Intangible assets subject to amortization: Customer relationships $ 16,000 10 Technical know-how 3,800 10 Non-compete agreements 700 5 Trade names 1,600 10 Total intangible assets subject to amortization $ 22,100 The Company’s cost of goods sold for the year ended December 31, 2021 includes a pre-tax charge of $317 of additional amortization expense related to identified intangible assets, which would have been recorded during the reporting period if the adjustments to the provisional amounts had been recognized as of the Closing Date. The Company’s other operating expense, net for the year ended December 31, 2021 includes a pre-tax charge of $1,583 of additional amortization expense related to identified intangible assets, which would have been recorded during the reporting period if the adjustments to the provisional amounts had been recognized as of the Closing Date. Pro forma financial information has not been presented as it is immaterial for the year ended December 31, 2021 .

Revenue from Contracts with Cus

Revenue from Contracts with Customers	12 Months Ended
	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	7. Revenue from Contracts with Customers: Revenue Recognition Model As described in Note 2, the Company applies the five-step revenue recognition model to each contract with its customers. Evidence of a contract between the Company and its customers may take the form of a master service agreement (“MSA”), a MSA in combination with an underlying purchase order, a combination of a pricing quote with an underlying purchase order or an individual purchase order received from a customer. The Company and certain of its customers enter into MSAs that establish the terms, including prices, under which orders to purchase goods may be placed. In cases where the MSA contains a distinct order for goods or contains an enforceable minimum quantity to be purchased by the customer, the Company considers the MSA to be evidence of a contract between the Company and its customer as the MSA creates enforceable rights and obligations. In cases where the MSA does not contain a distinct order for goods, the Company’s contract with a customer is the purchase order issued under the MSA. Customers of the Company may also negotiate orders via pricing quotes, which typically detail product pricing, delivery terms and payment information. When a customer procures goods under this method, the Company considers the combination of the pricing quote and the purchase order to create enforceable rights and obligations. Absent either a MSA or pricing quote, the Company considers an individual purchase order remitted by a customer to create enforceable rights and obligations. The Company identifies a performance obligation in a contract for each promised good that is separately identifiable from other promises in the contract and for which the customer can benefit from the good. The majority of the Company’s contracts have a single performance obligation, which is the promise to transfer individual goods to the customer. Single performance obligations are satisfied according to the shipping terms noted within the MSA or purchase order. The Company has certain contracts that include multiple performance obligations under which the purchase price for each distinct performance obligation is defined in the contract. These distinct performance obligations may include stand-ready provisions, which are arrangements to provide a customer assurance that they will have access to output from the Company’s manufacturing facilities, or monthly reservations of capacity fees. The Company considers stand-ready provisions and reservation of capacity fees to be performance obligations satisfied over time. Revenues related to stand-ready provisions and reservation of capacity fees are recognized on a ratable basis throughout the contract term and billed to the customer on a monthly basis. Revenue from product sales are recorded at the sales price, which includes estimates of variable consideration for which reserves are established and which result from discounts, returns or other allowances that are offered within contracts between the Company and its customers. The Company recognizes revenues when performance obligations under the terms of a contract with its customer are satisfied, which generally occurs at a point in time by transferring control of a product to the customer. The Company determines the point in time when a customer obtains control of a product and the Company satisfies the performance obligation by considering factors including when the Company has a right to payment for the product, the customer has legal title to the product, the Company has transferred possession of the product, the customer has assumed the risks and rewards of ownership of the product and the customer has accepted the product. Revenue is measured as the amount of consideration the Company expects to receive in exchange for transferring goods. The Company does not have any significant payment terms as payment is received at, or shortly after, the point of sale. Ecoservices Contracts between the Company’s Ecoservices segment and its customers are typically evidenced by entering into a MSA which generally has a term in excess of one year. Though each MSA is unique, the terms may include performance obligations such as stand-ready provisions and minimum purchase requirements. MSAs within the Ecoservices segment may contain raw material pricing adjustments which are typically based on a commodity index or Ecoservices’ cost to acquire the commodity. The Company’s exposure to fluctuations in raw material prices is limited, as the majority of pass-through contract provisions reset based on fluctuations in the underlying raw material price. These raw material pass-through provisions reset on a periodic basis and prospectively adjust the raw material cost component of the goods sold to the customer. The Company accounts for the raw material costs on a prospective basis, as the price changes affect the future consideration of the sale of goods. Stand-ready provisions within these contracts are billed on a monthly basis, as the performance obligation resets on a monthly basis and does not carry-over to the following month. Certain of the Company’s Ecoservices MSAs contain minimum purchase requirements that expire within the calendar year. The Company reviews each contract with minimum purchase requirements to determine if the customer will meet the provisions within the current calendar year. During the years ended December 31, 2022 and 2021, there have been no material issues in which Ecoservices customers failed to meet their contractual obligations. During the year ended December 31, 2020, some customers fell short of monthly orders due to the pandemic and take-or-pay provisions within contracts were acted upon. Catalyst Technologies The Company’s Catalyst Technologies segment sells customized products to its customers through its Silica Catalysts product group. These customized products are reformulations of existing Catalyst Technologies products, tailored to meet individual customer specifications. Prior to entering into an arrangement, the Company will allow a customer to obtain a sample of goods to ensure that it meets their needs. The customer will enter into a long-term supply arrangement that outlines the specification of the products to be sold and contains terms and conditions under which purchase orders are issued. These supply arrangements typically have a duration from one to ten years. Although the duration of these supply arrangements are in excess of one year, a contract is formed between the Company and its customer upon receipt of a purchase order. Contract Assets and Liabilities A contract asset is a right to consideration in exchange for goods that the Company has transferred to a customer when that right is conditional on something other than the passage of time. A contract liability exists when the Company receives consideration in advance of the fulfillment of its performance obligations. The Company has no contract assets or material contract liabilities recorded on its consolidated balance sheets as of December 31, 2022 and 2021, respectively. Practical Expedients and Accounting Policy Elections The Company has elected to use certain practical expedients and has made certain accounting policy elections as permitted under the revenue recognition guidance. The majority of the Company’s contracts with customers are based on an individual purchase order; thus, the duration of these contracts are for one year or less. As described above, the Company’s performance obligations reset either monthly or at the end of the calendar year. The Company has made an accounting policy election to omit certain disclosures related to these performance obligations, as the initial term of the Company’s performance obligations are for a term of one year or less. The Company uses an output method to recognize revenues related to performance obligations satisfied over time. These performance obligations, as described above, are satisfied within a calendar year. As such, the Company has elected to utilize the “as-invoiced” practical expedient, which permits the Company to recognize revenue in the amount to which it has a right to invoice the customer, provided that the amount corresponds directly with the value provided by the performance obligation as completed to date. When the Company performs shipping and handling activities after the transfer of control to the customer (e.g. when control transfers prior to delivery), they are considered fulfillment activities as opposed to separate performance obligations, and the Company recognizes revenue upon the transfer of control to the customer. Accordingly, the costs associated with these shipping and handling activities are accrued when the related revenue is recognized under the Company’s policy election. The Company does not utilize sales-based commissions plans, and as a result, the Company does not capitalize any costs which could be considered incremental costs of obtaining a contract. Sales, value added and other taxes the Company collects concurrent with revenue producing activities are excluded from revenues. Disaggregated Revenue The Company’s primary means of disaggregating revenues is by reportable segment, which can be found in Note 15 to these consolidated financial statements. The Company’s portfolio of products are integrated into a variety of end uses, which are described in the table below: Key End Uses Key Products Clean fuels, emission control & other • Refining hydrocracking catalysts • Emission control catalysts • Catalysts used in production of renewable fuels • Catalyst activation • Aluminum sulfate solution • Ammonium bisulfite solution Polymers & engineered plastics • Catalysts for high-density polyethylene and chemicals syntheses • Antiblocks for film packaging • Niche custom catalyst Regeneration and treatment services • Sulfuric acid regeneration services • Treatment services Industrial, mining, & automotive • Sulfur derivatives for industrial production • Sulfuric acid for mining • Sulfuric derivatives for nylon production The following table disaggregates the Company’s sales, by segment and end use, for the years ended December 31, 2022, 2021 and 2020: Year ended December 31, 2022 Ecoservices Catalyst Technologies (2) Total Clean fuels, emission control & other $ 28,966 $ — $ 28,966 Polymers & engineered plastics — 117,687 117,687 Regeneration and treatment services (1) 342,645 — 342,645 Industrial, mining & automotive 330,861 — 330,861 Total segment sales $ 702,472 $ 117,687 $ 820,159 Year ended December 31, 2021 Ecoservices Catalyst Technologies (2) Total Clean fuels, emission control & other $ 25,673 $ — $ 25,673 Polymers & engineered plastics — 110,688 110,688 Regeneration and treatment services (1) 262,026 — 262,026 Industrial, mining & automotive 212,814 — 212,814 Total segment sales $ 500,513 $ 110,688 $ 611,201 Year ended December 31, 2020 Ecoservices Catalyst Technologies (2) Total Clean fuels, emission control & other $ 11,955 $ — $ 11,955 Polymers & engineered plastics — 94,007 94,007 Regeneration and treatment services (1) 233,122 — 233,122 Industrial, mining & automotive 156,836 — 156,836 Total segment sales $ 401,913 $ 94,007 $ 495,920 (1) As described in Note 1, the Company experiences seasonal sales fluctuations to customers in the regeneration and treatment services end use. (2) Excludes the Company’s proportionate share of sales from the Zeolyst International and Zeolyst C.V. joint ventures (collectively, the “Zeolyst Joint Venture”) accounted for using the equity method (see Note 12 to these condensed consolidated financial statements for further information).

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	8. Fair Value Measurements: Fair values are based on quoted market prices when available. When market prices are not available, fair values are generally estimated using discounted cash flow analyses, incorporating current market inputs for similar financial instruments with comparable terms and credit quality. In instances where there is little or no market activity for the same or similar instruments, the Company estimates fair values using methods, models and assumptions that management believes a hypothetical market participant would use to determine a current transaction price. These valuation techniques involve some level of management estimation and judgment that becomes significant with increasingly complex instruments or pricing models. Where appropriate, adjustments are included to reflect the risk inherent in a particular methodology, model or input used. The Company’s financial assets and liabilities carried at fair value have been classified based upon a fair value hierarchy. The hierarchy gives the highest ranking to fair values determined using unadjusted quoted prices in active markets for identical assets and liabilities (Level 1) and the lowest ranking to fair values determined using methodologies and models with unobservable inputs (Level 3). The classification of an asset or a liability is based on the lowest level input that is significant to its measurement. For example, a Level 3 fair value measurement may include inputs that are both observable (Levels 1 and 2) and unobservable (Level 3). The levels of the fair value hierarchy are as follows: • Level 1—Values are unadjusted quoted prices for identical assets and liabilities in active markets accessible at the measurement date. Active markets provide pricing data for trades occurring at least weekly and include exchanges and dealer markets. • Level 2—Inputs include quoted prices for similar assets or liabilities in active markets, quoted prices from those willing to trade in markets that are not active, or other inputs that are observable or can be corroborated by market data for the term of the instrument. Such inputs include market interest rates and volatilities, spreads and yield curves. • Level 3—Certain inputs are unobservable (supported by little or no market activity) and significant to the fair value measurement. Unobservable inputs reflect the Company’s best estimate of what hypothetical market participants would use to determine a transaction price for the asset or liability at the reporting date. The following table presents information about the Company’s assets and liabilities that were measured at fair value on a recurring basis as of December 31, 2022 and 2021, and indicates the fair value hierarchy of the valuation techniques the Company utilized to determine such fair value. December 31, Quoted Prices in Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Derivative assets: Interest rate caps (Note 20) $ 34,374 $ — $ 34,374 $ — Derivative liabilities: Interest rate caps (Note 20) $ 2,071 $ — $ 2,071 $ — December 31, Quoted Prices in Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Derivative assets: Interest rate caps (Note 20) $ 1,080 $ — $ 1,080 $ — Derivative liabilities: Interest rate caps (Note 20) $ 1,288 $ — $ 1,288 $ — Derivative contracts Derivative assets and liabilities can be exchange-traded or traded over-the-counter (“OTC”). The Company generally values exchange-traded derivatives using models that calibrate to market transactions and eliminate timing differences between the closing price of the exchange-traded derivatives and their underlying instruments. OTC derivatives are valued using market transactions and other market evidence whenever possible, including market-based inputs to models, model calibration to market transactions, broker or dealer quotations or alternative pricing sources with reasonable levels of price transparency. When models are used, the selection of a particular model to value an OTC derivative depends on the contractual terms of, and specific risks inherent in, the instrument as well as the availability of pricing information in the market. The Company generally uses similar models to value similar instruments. Valuation models require a variety of inputs, including contractual terms, market prices and rates, forward curves, measures of volatility, and correlations of such inputs. For OTC derivatives that trade in liquid markets, such as forward contracts, swaps and options, model inputs can generally be corroborated by observable market data by correlation or other means, and model selection does not involve significant management judgment. As of December 31, 2022, the Company had interest rate caps that were fair valued using Level 2 inputs. In addition, the Company applies a credit valuation adjustment to reflect credit risk which is calculated based on credit default swaps. To the extent that the Company’s net exposure under a specific master agreement is an asset, the Company utilizes the counterparty’s default swap rate. If the net exposure under a specific master agreement is a liability, the Company utilizes a default swap rate comparable to Ecovyst. The credit valuation adjustment is added to the discounted fair value to reflect the exit price that a market participant would be willing to receive to assume the Company’s liabilities or that a market participant would be willing to pay for the Company’s assets.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2022
Equity [Abstract]
Stockholders' Equity	9. Stockholders' Equity: Accumulated Other Comprehensive Income (Loss) The stockholders’ equity footnote disclosures have been revised to include the impact of discontinued operations on pensions and postretirement benefits and foreign currency translation for the year ended December 31, 2021 in other comprehensive income (loss) and accumulated other comprehensive income (loss). See Note 1 to these consolidated financial statements for further information on the reclassification and correction of errors in historical presentation. The following table presents the components of accumulated other comprehensive income (loss), net of tax, as of December 31, 2022 and 2021: December 31, 2022 2021 Amortization and unrealized gains on pension and postretirement plans, net of tax of $(4,078) and $(4,957) $ 12,132 $ 14,808 Net changes in fair values of derivatives, net of tax of $(9,057) and $(759) 26,636 2,254 Foreign currency translation adjustments, net of tax of $8,177 and $8,177 (32,776) (22,854) Accumulated other comprehensive income (loss) $ 5,992 $ (5,792) The following table presents the tax effects of each component of other comprehensive income (loss) for the years ended December 31, 2022, 2021 and 2020: Years ended 2022 2021 2020 Pre-tax amount Tax benefit/ After-tax amount Pre-tax amount Tax benefit/ After-tax amount Pre-tax amount Tax benefit/ After-tax amount Defined benefit and other postretirement plans: Amortization of net gains and (losses) $ (3,383) $ 836 $ (2,547) $ 10,917 $ (2,757) $ 8,160 $ 2,627 $ (791) $ 1,836 Amortization of prior service cost (210) 52 (158) (232) 58 (174) (232) 58 (174) Settlement gain (loss) 39 (10) 29 2,059 (515) 1,544 64 (16) 48 Benefit plans, net (3,554) 878 (2,676) 12,744 (3,214) 9,530 2,459 (749) 1,710 Net gain from hedging activities 33,194 (8,812) 24,382 3,885 (971) 2,914 1,569 (392) 1,177 Foreign currency translation (1) (9,922) — (9,922) (9,202) 6,954 (2,248) 1,784 (6,251) (4,467) Other comprehensive income (loss) $ 19,718 $ (7,934) $ 11,784 $ 7,427 $ 2,769 $ 10,196 $ 5,812 $ (7,392) $ (1,580) (1) The income tax benefit or expense included in other comprehensive income is attributed to the portion of foreign currency translation associated with the Company’s cross-currency interest rate swaps, for which the tax effect is based on the applicable U.S. deferred income tax rate. See Note 20 to these consolidated financial statements for information regarding the Company’s cross currency interest rate swaps. The following table presents the changes in accumulated other comprehensive income (loss), net of tax, by component for the years ended December 31, 2022 and 2021: Defined benefit Net gain (loss) from hedging activities Foreign Total December 31, 2020 $ 5,278 $ (660) $ (19,883) $ (15,265) Other comprehensive income before reclassifications 5,622 2,580 11,043 19,245 Amounts reclassified from accumulated other comprehensive income (1) 3,908 334 (14,014) (9,772) Net current period other comprehensive income (loss) 9,530 2,914 (2,971) 9,473 December 31, 2021 14,808 2,254 (22,854) (5,792) Other comprehensive income (loss) before reclassifications (2,832) 23,868 (9,922) 11,114 Amounts reclassified from accumulated other comprehensive income (1) 156 514 — 670 Net current period other comprehensive income (loss) (2,676) 24,382 (9,922) 11,784 December 31, 2022 $ 12,132 $ 26,636 $ (32,776) $ 5,992 (1) See the following table for details about these reclassifications. Amounts in parentheses indicate debits. The following table presents the reclassifications out of accumulated other comprehensive income for the years ended December 31, 2022 and 2021. Details about Accumulated Other Amount Reclassified from Accumulated Other Comprehensive Income (1) Affected Line Item in the Years ended 2022 2021 Amortization of defined benefit and other postretirement plans: Prior service credit $ (210) $ (232) Other (expense) income (2) Actuarial losses 3 5 Other (expense) income (2) Release of actuarial losses — (3,737) Net loss from discontinued operations, net of tax (207) (3,964) Total before tax 51 56 Tax benefit $ (156) $ (3,908) Net of tax Gains and losses on cash flow hedges: Interest rate caps $ (683) $ (444) Interest expense 169 110 Tax benefit (514) (334) Net of tax Release of foreign currency translation — 14,014 Net loss from discontinued operations, net of tax Total reclassifications for the period $ (670) $ 9,772 Net of tax (1) Amounts in parentheses indicate debits to profit/loss. (2) These accumulated other comprehensive income (loss) components are components of net periodic pension and other postretirement cost (see Note 22 to these consolidated financial statements for additional details). Treasury Stock Repurchases 2020 Stock Repurchase Program On March 12, 2020, the Company’s Board of Directors (the “Board”) approved a plan to purchase up to $50,000 of the Company’s common stock under a stock repurchase program approved by the Board. Under the plan, the Company could repurchase shares from time to time for cash in open market transactions or in privately negotiated transactions in accordance with applicable federal securities laws. The Company determined the timing and the amount of any repurchases based on its evaluation of market conditions, share price and other factors. The stock repurchase program expired in March 2022, with no repurchases made in 2022 through the expiration of the program, nor during the year ended December 31, 2021. 2022 Stock Repurchase Program On April 27, 2022, the Board approved a stock repurchase program that permits the Company to purchase up to $450,000 of the Company’s common stock over the next four years. Under the plan, the Company can repurchase shares from time to time for cash in open market transactions or in privately negotiated transactions in accordance with applicable federal securities laws. The Company will determine the timing and the amount of any repurchases based on its evaluation of market conditions, share price and other factors. During the year ended December 31, 2022, the Company repurchased 1,970,763 shares of its common stock on the open market at an average price of $9.82 per share, for a total of $19,356. Additionally, i n connection with secondary offerings of the Company’s common stock, the Company repurchased 6,500,000 shares of its common stock sold in the August 2022 offering from the underwriters at a price of $8.36 per share and 8,000,000 shares of its common stock sold in the November 2022 offering from the underwriters at a price of $7.88 per share, for a total of $117,346. As of December 31, 2022, $313,298 was available for additional share repurchases under the program. Tax Withholdings on Equity Award Vesting In connection with the vesting of restricted stock awards, restricted stock units and performance stock units, shares of common stock may be delivered to the Company by employees to satisfy withholding tax obligations at the instruction of the employee award holders. These transactions, when they occur, are accounted for as stock repurchases by the Company, with the shares returned to treasury stock at a cost representing the payment by the Company of the tax obligations on behalf of the employees in lieu of shares for the vesting unit. The fair value of the shares withheld to cover tax payments were $332 and $1,470 for the years ended December 31, 2022 and 2021 , respectively. Dividends Paid On December 14, 2020, the Company’s Board of Directors declared a special cash dividend of $1.80 per share, using after tax cash proceeds and cash on hand from the sale of the Performance Materials business. The dividend was paid to our stockholders of record at the close of business on December 31, 2020. See Note 4 of these consolidated financial statements for additional details. On August 4, 2021, the Company’s Board declared a special cash dividend of $3.20 per share, using after tax cash proceeds from the sale of the Performance Chemicals business. The dividend was paid on August 23, 2021 to the Company’s stockholders of record at the close of business on August 12, 2021. See Note 5 of these consolidated financial statements for additional details.

Other Operating Expense, Net

Other Operating Expense, Net	12 Months Ended
	Dec. 31, 2022
Other Income and Expenses [Abstract]
Other Operating Expense, Net	10. Other Operating Expense, Net: A summary of other operating expense, net is as follows: Years ended 2022 2021 2020 Amortization expense $ 10,562 $ 10,321 $ 8,689 Transaction and other related costs 6,988 2,268 1,033 Restructuring, integration and business optimization costs (1) 11,566 3,866 1,994 Net loss on asset disposals 3,594 5,666 4,722 Other, net 2,201 2,152 1,404 $ 34,911 $ 24,273 $ 17,842 (1) During the year ended December 31, 2022, the Company’s results were impacted by costs associated with severance charges for certain executives and employees. The severance charges were not related to a specific restructuring plan of the Company, but rather were incurred primarily in connection with the leadership transition in April 2022 and the retirement of several executives.

Inventories, Net

Inventories, Net	12 Months Ended
	Dec. 31, 2022
Inventory Disclosure [Abstract]
Inventories	11. Inventories, Net: Inventories, net are classified and valued as follows: December 31, 2022 2021 Finished products and work in process $ 39,909 $ 46,894 Raw materials 4,453 6,919 $ 44,362 $ 53,813 Valued at lower of cost or market: LIFO basis $ 25,258 $ 33,330 Valued at lower of cost and net realizable value: FIFO or average cost basis 19,104 20,483 $ 44,362 $ 53,813 The domestic inventory acquired as part of a previous business combination is valued based on the LIFO method. Therefore, the fair value allocated to the acquired LIFO inventory was treated as the new base inventory value. If inventories valued under the LIFO basis had been valued using the FIFO method, inventories would have been $7,002 and $6,837 lower than reported as of December 31, 2022 and 2021, respectively, driven primarily by the purchase accounting fair value step-up of the LIFO inventory base value associated with the business combination.

Investments in Affiliated Compa

Investments in Affiliated Companies	12 Months Ended
	Dec. 31, 2022
Equity Method Investments and Joint Ventures [Abstract]
Investments in Affiliated Companies	12. Investments in Affiliated Companies: The Company accounts for investments in affiliated companies under the equity method. Affiliated companies accounted for on the equity basis as of December 31, 2022 are as follows: Company Country Percent Zeolyst International USA 50% Zeolyst C.V. Netherlands 50% Following is summarized information of the combined investments (1) : December 31, 2022 2021 Current assets $ 278,330 $ 245,859 Noncurrent assets 196,775 223,982 Current liabilities 47,407 43,337 Noncurrent liabilities 16,000 7,471 Years ended 2022 2021 2020 Sales $ 306,511 $ 296,416 $ 275,621 Gross profit 105,693 101,069 88,616 Operating income 67,169 66,978 53,500 Net income 68,255 68,433 55,328 (1) Summarized information of the combined investments is presented at 100%; the Company’s share of the net assets and net income of affiliates is calculated based on the percent ownership specified in the table above. The Company’s investments in affiliated companies balance as of December 31, 2022 and 2021 includes net purchase accounting fair value adjustments of $231,017 and $237,419, respectively, related to a prior business combination, consisting primarily of goodwill and intangible assets such as customer relationships, technical know-how and trade names. Consolidated equity in net income from affiliates is net of $6,403, $6,480 and $6,634 of amortization expense related to purchase accounting fair value adjustments for the years ended December 31, 2022, 2021 and 2020, respectively. The following table summarizes the activity related to the Company’s investments in affiliated companies balance on the consolidated balance sheets: Years ended 2022 2021 Balance at beginning of period $ 446,074 $ 458,128 Equity in net income of affiliated companies 34,128 34,216 Charges related to purchase accounting fair value adjustments (6,402) (6,480) Dividends received (35,000) (35,000) Foreign currency translation adjustments (2,787) (4,790) Balance at end of period $ 436,013 $ 446,074 The Company had net receivables due from affiliates of $3,539 and $6,739 as of December 31, 2022 and 2021, respectively, which are included in prepaid and other current assets. Net receivables due from affiliates are generally non-trade receivables. Sales to affiliates were $5,915, $3,643 and $7,042 for the years ended December 31, 2022, 2021 and 2020, respectively. The Company did not purchase goods from affiliates during the years ended December 31, 2022, 2021 and 2020. On December 18, 2013, the Company and its joint venture, Zeolyst International, entered into a ten year real estate tax abatement agreement with the Unified Government of Wyandotte County, Kansas. The agreement utilizes an Industrial Revenue Bond (“IRB”) financing structure to achieve a 75% real estate tax abatement on the value of the improvements that were constructed during the expansion of the Company and Zeolyst International’s facilities at the jointly-operated Kansas City, Kansas plant. A similar tax abatement agreement has been executed on an annual basis since December 18, 2013 with respect to additional plant expansions during those years. During the year ended December 31, 2019, the original IRB financing structure from December 2013 was exhausted. In order to fund future plant expansions, the Company entered into an additional IRB financing structure on December 19, 2019 with similar terms and conditions, which also provides for 75% real estate tax abatement on the value of future improvements. The financing obligations and the industrial bonds receivable have been presented net, as the financing obligations and the industrial bonds meet the criteria for right of set off conditions under GAAP.

Property, Plant and Equipment

Property, Plant and Equipment	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	13. Property, Plant and Equipment: A summary of property, plant and equipment, at cost, and related accumulated depreciation is as follows: December 31, 2022 2021 Land $ 96,659 $ 97,047 Buildings and improvements 82,061 77,851 Machinery and equipment 751,145 714,435 Construction in progress 56,448 45,952 986,313 935,285 Less: accumulated depreciation (401,424) (339,054) $ 584,889 $ 596,231 Depreciation expense was $65,121, $65,955 and $65,333 for the years ended December 31, 2022, 2021 and 2020, respectively.

Leases

Leases	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Lessee, Finance Leases	14. Leases: Operating lease costs of $10,318 and $9,825 are included in cost of goods sold and in selling, general and administrative expenses on the consolidated statement of income for the year ended December 31, 2022 and 2021, respectively. Finance lease and financing obligation costs of $3,400 and $1,656 are included in cost of goods sold and in selling, general, and administrative expenses on the consolidated statement of income for the years ended December 31, 2022 and 2021. Lease income is not material to the results of operations for the years ended December 31, 2022 and 2021. The table below presents the operating leases, finance leases, and financing obligation right-of-use assets and liabilities recognized on the consolidated balance sheet as of December 31, 2022 and 2021: Classification December 31, December 31, Assets Operating lease assets Right-of-use lease assets $ 28,265 $ 30,115 Finance lease and financing obligation assets Property, plant and equipment, net 21,506 29,737 Total leased assets $ 49,771 $ 59,852 Liabilities Current: Operating lease liabilities Operating lease liabilities—current $ 8,155 $ 8,306 Finance lease and financing obligation liabilities Accrued liabilities 2,855 3,181 Noncurrent: Operating lease liabilities Operating lease liabilities—noncurrent 20,021 21,719 Finance lease and financing obligation liabilities Other long-term liabilities 7,633 11,667 Total leased liabilities $ 38,664 $ 44,873 The Company’s weighted average remaining lease term and weighted average discount rate for operating and financing leases as of December 31, 2022 are as follows: December 31, December 31, Weighted average remaining lease term (in years): Operating leases 4.45 4.79 Finance leases and financing obligation 3.57 4.69 Weighted average discount rate: Operating leases 5.24 % 5.02 % Finance leases and financing obligation 2.86 % 2.86 % Maturities of lease liabilities as of December 31, 2022 are as follows: Year Operating Finance 2023 $ 9,339 $ 3,063 2024 7,748 3,063 2025 5,797 3,036 2026 4,166 1,878 2027 2,770 — Thereafter 1,979 — Total lease payments 31,799 11,040 Less: Interest (3,623) (552) Total lease liabilities (1) $ 28,176 $ 10,488 (1) Refer to the above table regarding the Company’s right-of-use lease assets and lease liabilities for the presentation of the lease liabilities in the Company’s consolidated balance sheet as of December 31, 2022. The following table presents other information related to the Company’s operating leases, finance leases and financing obligation and the impact on the Company’s consolidated statement of cash flows: Years ended 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Payments on operating leases included in operating cash flows $ 10,327 $ 9,755 Interest payments under finance leases and financing obligation included in operating cash flows 339 189 Principal payments under finance leases and financing obligation included in financing cash flows 2,724 1,466 Right-of-use assets obtained in exchange for new lease liabilities (non-cash): Operating leases 7,462 9,526
Lessee, Operating Leases	14. Leases: Operating lease costs of $10,318 and $9,825 are included in cost of goods sold and in selling, general and administrative expenses on the consolidated statement of income for the year ended December 31, 2022 and 2021, respectively. Finance lease and financing obligation costs of $3,400 and $1,656 are included in cost of goods sold and in selling, general, and administrative expenses on the consolidated statement of income for the years ended December 31, 2022 and 2021. Lease income is not material to the results of operations for the years ended December 31, 2022 and 2021. The table below presents the operating leases, finance leases, and financing obligation right-of-use assets and liabilities recognized on the consolidated balance sheet as of December 31, 2022 and 2021: Classification December 31, December 31, Assets Operating lease assets Right-of-use lease assets $ 28,265 $ 30,115 Finance lease and financing obligation assets Property, plant and equipment, net 21,506 29,737 Total leased assets $ 49,771 $ 59,852 Liabilities Current: Operating lease liabilities Operating lease liabilities—current $ 8,155 $ 8,306 Finance lease and financing obligation liabilities Accrued liabilities 2,855 3,181 Noncurrent: Operating lease liabilities Operating lease liabilities—noncurrent 20,021 21,719 Finance lease and financing obligation liabilities Other long-term liabilities 7,633 11,667 Total leased liabilities $ 38,664 $ 44,873 The Company’s weighted average remaining lease term and weighted average discount rate for operating and financing leases as of December 31, 2022 are as follows: December 31, December 31, Weighted average remaining lease term (in years): Operating leases 4.45 4.79 Finance leases and financing obligation 3.57 4.69 Weighted average discount rate: Operating leases 5.24 % 5.02 % Finance leases and financing obligation 2.86 % 2.86 % Maturities of lease liabilities as of December 31, 2022 are as follows: Year Operating Finance 2023 $ 9,339 $ 3,063 2024 7,748 3,063 2025 5,797 3,036 2026 4,166 1,878 2027 2,770 — Thereafter 1,979 — Total lease payments 31,799 11,040 Less: Interest (3,623) (552) Total lease liabilities (1) $ 28,176 $ 10,488 (1) Refer to the above table regarding the Company’s right-of-use lease assets and lease liabilities for the presentation of the lease liabilities in the Company’s consolidated balance sheet as of December 31, 2022. The following table presents other information related to the Company’s operating leases, finance leases and financing obligation and the impact on the Company’s consolidated statement of cash flows: Years ended 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Payments on operating leases included in operating cash flows $ 10,327 $ 9,755 Interest payments under finance leases and financing obligation included in operating cash flows 339 189 Principal payments under finance leases and financing obligation included in financing cash flows 2,724 1,466 Right-of-use assets obtained in exchange for new lease liabilities (non-cash): Operating leases 7,462 9,526

Reportable Segments

Reportable Segments	12 Months Ended
	Dec. 31, 2022
Segment Reporting [Abstract]
Reportable Segments	15. Reportable Segments: The Company has organized its business around two operating segments based on the review of discrete financial results for each of the operating segments by the Company’s chief operating decision maker (the Company’s Chief Executive Officer), or CODM, for performance assessment and resource allocation purposes. Each of the Company’s operating segments represents a reportable segment under GAAP. The Company’s reportable segments are organized based on the nature and economic characteristics of the Company’s products. The Company’s two reportable segments are as follows: (1) Ecoservices provides sulfuric acid recycling to the North American refining industry for the production of alkylate and provides on-purpose virgin sulfuric acid for water treatment, mining, and industrial applications; and (2) Catalyst Technologies serves the polymers and engineered plastics and the global refining, petrochemical and emissions control industries. The Catalyst Technologies segment includes equity in net income from Zeolyst International and Zeolyst C.V. (collectively, the “Zeolyst Joint Venture”), each of which are 50/50 joint ventures with CRI Zeolites Inc. (a wholly-owned subsidiary of Royal Dutch Shell). The Zeolyst Joint Venture is accounted for using the equity method in the Company’s consolidated financial statements (see Note 12 to these consolidated financial statements for further information). Company management evaluates the Catalyst Technologies segment’s performance, including the Zeolyst Joint Venture, on a proportionate consolidation basis. Accordingly, the revenues and expenses used to compute the Catalyst Technologies segment’s adjusted earnings before interest, income taxes, depreciation and amortization (“Adjusted EBITDA”) include the Zeolyst Joint Venture’s results of operations on a proportionate basis based on the Company’s 50% ownership level. Since the Company uses the equity method of accounting for the Zeolyst Joint Venture, these items are eliminated when reconciling to the Company’s consolidated results of operations. The Company’s management evaluates the operating results of each reportable segment based upon Adjusted EBITDA. Adjusted EBITDA consists of EBITDA, which is a measure defined as net income before interest, income taxes, depreciation and amortization (each of which is included in the Company’s consolidated statements of income), and adjusted for certain items as discussed below. Summarized financial information for the Company’s reportable segments is shown in the following table: Years ended 2022 2021 2020 Sales: Ecoservices $ 702,472 $ 500,513 $ 401,913 Catalyst Technologies (1) 117,687 110,688 94,007 Total $ 820,159 $ 611,201 $ 495,920 Adjusted EBITDA: (2) Ecoservices $ 227,760 $ 177,672 $ 157,198 Catalyst Technologies (3) 77,978 88,028 74,504 Adjusted EBITDA from reportable segments $ 305,738 $ 265,700 $ 231,702 (1) Excludes the Company’s proportionate share of sales from the Zeolyst Joint Venture accounted for using the equity method. The proportionate share of sales is $132,588, $131,332 and $128,623 for the years ended December 31, 2022, 2021 and 2020, respectively. (2) The Company defines Adjusted EBITDA as EBITDA adjusted for certain items as noted in the reconciliation below. Management evaluates the performance of its segments and allocates resources based on several factors, of which the primary measure is Adjusted EBITDA. Adjusted EBITDA should not be considered as an alternative to net income as an indicator of the Company’s operating performance. Adjusted EBITDA as defined by the Company may not be comparable with EBITDA or Adjusted EBITDA as defined by other companies. (3) The Adjusted EBITDA from the Zeolyst Joint Venture included in the Catalyst Technologies segment is $50,331 for the year ended December 31, 2022, which includes $27,931 of equity in net income plus $6,403 of amortization of investment in affiliate step-up plus $15,997 of joint venture depreciation, amortization and interest. The Adjusted EBITDA from the Zeolyst Joint Venture included in the Catalyst Technologies segment is $49,872 for the year ended December 31, 2021, which includes $27,827 of equity in net income plus $6,480 of amortization of investment in affiliate step-up plus $15,565 of joint venture depreciation, amortization and interest. The Adjusted EBITDA from the Zeolyst Joint Venture included in the Catalyst Technologies segment is $42,515 for the year ended December 31, 2020, which includes $21,157 of equity in net income plus $6,634 of amortization of investment in affiliate step-up plus $14,724 of joint venture depreciation, amortization and interest. A reconciliation of income from continuing operations before income taxes to Adjusted EBITDA from reportable segments is as follows: Years ended 2022 2021 2020 Reconciliation of income from continuing operations before income taxes to Adjusted EBITDA from reportable segments Income from continuing operations before income taxes $ 94,735 $ 13,941 $ 2,215 Interest expense, net 37,217 36,990 50,409 Depreciation and amortization 79,163 79,741 76,926 Unallocated corporate expenses 29,042 38,089 39,087 Joint venture depreciation, amortization and interest 15,997 15,565 14,724 Amortization of investment in affiliate step-up 6,402 6,480 6,634 Debt extinguishment costs — 26,902 25,028 Net loss on asset disposals 3,594 5,666 4,722 Foreign currency exchange loss (gain) 1,388 4,716 (5,264) LIFO benefit (165) (1,931) (5,262) Transaction and other related costs 6,988 2,009 1,118 Equity-based compensation 20,632 31,838 17,194 Restructuring, integration and business optimization expenses 11,566 3,866 1,994 Other (821) 1,828 2,177 Adjusted EBITDA from reportable segments $ 305,738 $ 265,700 $ 231,702 The Company’s consolidated results include equity in net income from affiliated companies of $27,725, $27,737 and $21,065 for the years ended December 31, 2022, 2021, and 2020, respectively. This is primarily comprised of equity in net income of $27,931, $27,827 and $21,157 in the Catalyst Technologies segment from the Zeolyst Joint Venture for the years ended December 31, 2022, 2021 and 2020, respectively. The Company’s equity in net income from affiliated companies in the consolidated results includes amortization expense related to purchase accounting fair value adjustments associated with the Zeolyst Joint Venture as a result of a prior business combination. Capital expenditures for the Company’s reportable segments are shown in the following table: Years ended 2022 2021 2020 Capital expenditures: Ecoservices $ 47,770 $ 43,561 $ 31,799 Catalyst Technologies (1) 8,194 15,997 11,177 Corporate (2) 2,906 487 11,861 Capital expenditures per the consolidated statements of cash flows $ 58,870 $ 60,045 $ 54,837 (1) Excludes the Company’s proportionate share of capital expenditures from the Zeolyst Joint Venture. (2) Includes corporate capital expenditures, the cash impact from changes in capital expenditures in accounts payable and capitalized interest. Total assets by segment are not disclosed by the Company because the information is not prepared or used by the CODM to assess performance and to allocate resources. Sales by geographic area are presented in the following table. Sales are attributed to countries based upon location of products shipped. Years ended 2022 2021 2020 Sales (1) : United States $ 774,119 $ 571,587 $ 443,682 Other foreign countries 46,040 39,614 52,238 Total $ 820,159 $ 611,201 $ 495,920 (1) Except for the United States, no sales in an individual country exceeded 10% of the Company’s total sales. The Company sold products through its Ecoservices and Catalyst Technologies segments to customer A, which accounted for 12.3%, 12.6% and 10.4% of the Company’s total sales as of December 31, 2022, 2021, and 2020 respectively. Long-lived assets by geographic area is presented in the following table. Long-lived assets includes property, plant and equipment, net and right-of-use lease assets. December 31, 2022 2021 Long-lived assets: United States $ 587,726 $ 597,506 Other foreign countries 25,428 28,840 Total $ 613,154 $ 626,346

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	16. Goodwill and Other Intangible Assets: The changes in the carrying amount of goodwill for the years ended December 31, 2022 and 2021 is summarized as follows: Ecoservices Catalyst Technologies Total Balance as of December 31, 2020 $ 311,892 $ 79,673 $ 391,565 Goodwill recognized (Note 6) 14,778 — 14,778 Foreign exchange impact — (204) (204) Balance as of December 31, 2021 326,670 79,469 406,139 Goodwill adjustments (1) (81) — (81) Foreign exchange impact — (2,895) (2,895) Balance as of December 31, 2022 $ 326,589 $ 76,574 $ 403,163 (1) During the year ended December 31, 2022, the Company recorded an adjustment of $81 between goodwill and deferred tax liabilities related to the final tax purchase price allocation for the Chem32 acquisition. The Company completed its annual goodwill impairment assessments as of October 1, 2022 and 2021. For the annual assessments, the Company bypassed the option to perform the qualitative assessment and proceeded directly to performing the quantitative goodwill impairment test for each of its reporting units. The quantitative test identifies both the potential existence of impairment and the amount of impairment loss. For each of the October 1, 2022 and 2021 assessments, the Company identified two reporting units, which align with the Company’s operating segments. The Company determined the fair value of its reporting units using a split between a market approach and an income, or discounted cash flow, approach. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The Company estimates reporting unit market approach fair value using publicly traded comparable company values and applies the selected market multiples to each reporting unit’s trailing twelve months adjusted EBITDA. The Company estimates reporting unit income-based fair value using the discounted cash flow approach. This approach requires use of significant assumptions about future cash flows and based on management’s assessment of a number of factors. Such factors include reporting unit revenue growth rates from implementation of strategic plans, operating margin growth rates, the perpetual growth rate, and the weighted average cost of capital, as well as the reporting unit’s recent performance and management’s ability to execute on planned future strategic initiatives. Discount rate assumptions are based on an assessment of the risk inherent in those future cash flows. As of October 1, 2022, the fair values of each of the Company’s reporting units exceeded their respective carrying values and therefore, no goodwill impairment exists for the year ended December 31, 2022. In addition to the annual goodwill impairment assessment, the Company also performed the annual impairment test over its other indefinite-lived intangible assets as of October 1, 2022 and 2021. The fair values of the Company’s indefinite-lived trade names and trademarks were in excess of their carrying amounts as of the respective testing dates, and as such, there was no further impairment of the Company’s indefinite-lived intangible assets for the years ended December 31, 2022 and 2021. Gross carrying amounts and accumulated amortization for intangible assets other than goodwill are as follows: December 31, 2022 December 31, 2021 Gross Accumulated Net Gross Accumulated Net Technical know-how $ 54,880 $ (23,822) $ 31,058 $ 55,922 $ (20,648) $ 35,274 Customer relationships 130,636 (66,669) 63,967 131,248 (57,262) 73,986 Non-compete agreements 700 (257) 443 700 (117) 583 Trademarks 7,387 (3,283) 4,104 7,682 (2,902) 4,780 Trade names 1,600 (293) 1,307 1,600 (133) 1,467 Total definite-lived intangible assets 195,203 (94,324) 100,879 197,152 (81,062) 116,090 Indefinite-lived trade names 25,153 — 25,153 25,627 — 25,627 In-process research and development 3,900 — 3,900 3,900 — 3,900 Total intangible assets $ 224,256 $ (94,324) $ 129,932 $ 226,679 $ (81,062) $ 145,617 The Company amortizes technical know-how over periods that range from ten years to twenty years, customer relationships over periods that range from ten years to fifteen years, non-compete agreements over five years, trademarks over fifteen years, and trade names over ten years. In-process research and development intangible assets are considered indefinite-lived until such time as the associated projects are completed, at which time amortization commences on the assets, or abandoned, which results in the impairment of the assets. Amortization expense related to technical know-how is included in cost of goods sold in the consolidated statements of income and was $3,480, $3,465 and $3,111 for the years ended December 31, 2022, 2021 and 2020, respectively. Amortization expense related to customer relationships, non-compete agreements, trademarks, and tradenames is included in other operating expense, net in the consolidated statements of income and was $10,562, $10,321 and $8,678 for the years ended December 31, 2022, 2021 and 2020, respectively. Estimated future aggregate amortization expense of intangible assets is as follows: Year Amount 2023 $ 14,023 2024 14,023 2025 14,023 2026 12,881 2027 12,346 Thereafter 33,583 Total estimated future aggregate amortization expense $ 100,879

Accrued Liabilities

Accrued Liabilities	12 Months Ended
	Dec. 31, 2022
Payables and Accruals [Abstract]
Accrued Liabilities	17. Accrued Liabilities: The following table summarizes the components of accrued liabilities as follows: December 31, 2022 2021 Compensation and bonus $ 30,890 $ 30,079 Interest 10,493 5,650 Property tax 2,123 2,144 Income taxes 4,412 9,864 Finance lease and financing obligation liabilities 2,855 3,181 Dividends payable 4,062 8,574 Accrued closing adjustments for Performance Chemicals divestiture (Note 5) — 3,745 Other 17,394 12,678 $ 72,229 $ 75,915

Long-term Debt

Long-term Debt	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Long-term Debt	18. Long-term Debt: The summary of long-term debt is as follows: December 31, 2022 2021 Senior Secured Term Loan Facility due June 2028 (the "2021 Term Loan Facility") $ 886,500 $ 895,500 ABL Facility — — Total debt 886,500 895,500 Original issue discount (7,472) (8,762) Deferred financing costs (4,158) (4,899) Total debt, net of original issue discount and deferred financing costs 874,870 881,839 Less: current portion (9,000) (9,000) Total long-term debt, excluding current portion $ 865,870 $ 872,839 ABL Facility On May 4, 2016, PQ Corporation (“PQ Corp”), an indirect, wholly owned subsidiary of the Company prior to the closing of the sale of the Performance Chemical business entered into a $200,000 senior secured asset-based revolving credit facility (the “ABL Facility”), which provided for $200,000 revolving credit commitments. On March 20, 2020, PQ Corp amended its existing ABL Facility to increase the aggregate amount of the revolving loan commitments available by $50,000 to $250,000, consisting of up to $195,000 in U.S. commitments, up to $15,000 in Canadian commitments and up to $40,000 in European commitments. The maturity of the facility was extended to March 20, 2025. In addition, there was an annual commitment fee equal to 0.375%, with a step-down to 0.25% based on average usage of the revolving credit borrowings available Following the amendment, the borrowings under the amended ABL Facility bore interest at a rate equal to the LIBOR rate or the base rate plus a margin of between 1.25% to 1.75% or 0.25% to 0.75%, respectively. On June 9, 2021, PQ Corp and Ecovyst LLC (as defined below) entered into a third amendment agreement (the “ABL Amendment”), which amended its ABL Credit Agreement, dated as of May 4, 2016 (the “ABL Credit Agreement” and, as amended by the ABL Amendment, the “Amended ABL Credit Agreement”). The ABL Amendment, among other things, following the sale of Performance Chemicals, decreased the aggregate amount of revolving loan commitments available to the borrowers thereunder by an aggregate amount of $150,000 to $100,000, consisting of $90,000 in U.S. commitments and $10,000 in European commitments and extended the maturity date with respect to borrowings under the Amended ABL Credit Agreement to August 2, 2026. On February 17, 2023, the Company amended the ABL Facility to replace LIBOR with a SOFR as the benchmark interest rate with respect to U.S. dollar-denominated borrowings. Following these amendments, U.S. dollar-denominated borrowings under the ABL Facility will bear interest at a rate equal to an adjusted SOFR rate or the base rate plus a margin of between 1.25% and 1.75% or 0.25% to 0.75%, respectively. As of December 31, 2022, there were no revolving credit borrowings outstanding under the ABL Facility. Revolving credit borrowings are payable at the option of the Borrower throughout the term of the ABL Facility with the balance due August 2, 2026. The Company has the ability to request letters of credit under the ABL Facility. The Company had $4,043 of letters of credit outstanding as of December 31, 2022, which reduce available borrowings under the ABL Facility by such amounts. The obligations of the Borrower under the ABL Facility are guaranteed by the same U.S. subsidiary guarantors that guarantee the 2021 Term Loan Facility (as described below) and the obligations of the European Borrowers under the ABL Facility are guaranteed by a certain European subsidiary of the Borrower. The obligations of the borrowers and guarantors under the ABL Facility are secured (i) by a first-priority security interest in, among other things, substantially all of their receivables, inventory, deposit accounts and other collateral securing the ABL Facility on a first-priority basis and (ii) by a second-priority security interest in the property and assets of the Borrower and the U.S. subsidiary guarantors that secure the 2021 Term Loan Facility. In addition, the ABL Facility is secured by the equity interests in, and substantially all of the assets of, certain foreign guarantors in connection with the Euro-denominated availability. The ABL Facility and the 2021 Term Loan Facility contain various non-financial restrictive covenants. The ABL Facility also contains one financial covenant which applies when minimum availability under the ABL Facility exceeds a certain threshold. During such time, the Company is required to maintain a fixed-charge coverage ratio of at least 1.0 to 1.0. The Company is in compliance with all debt covenants as of December 31, 2022 and 2021, respectively. 2021 Term Loan Facility On June 9, 2021, PQ Corp and Ecovyst Catalyst Technologies LLC (“Ecovyst LLC” and, following the closing of the sale of the Performance Chemicals business, the “Borrower”), an indirect, wholly owned subsidiary of the Company, entered into an agreement (the “2021 Credit Agreement”) for the 2021 Term Loan Facility in an aggregate principal amount of $900,000 with an original issue discount of 0.25% and interest at a floating rate of LIBOR (with a 0.50% minimum LIBOR floor) plus 2.75% per annum (or, depending on the Borrower’s first lien net leverage ratio, 2.50%). The 2021 Term Loan Facility requires scheduled quarterly amortization payments, each equal to 0.25% of the original principal amount of the loans under the 2021 Term Loan Facility. The proceeds of the 2021 Term Loan Facility were used to pay in full the 2020 Term Loan Facility, partially pay the 2018 Term Loan Facility (each as described below) and pay the associated fees and expenses. As of December 31, 2022, the 2021 Term Loan Facility accrued interest at a floating rate of LIBOR plus 2.75% per annum and is scheduled to mature in June 2028. On February 9, 2023, the Company amended the 2021 Term Loan Facility to replace LIBOR with SOFR as the benchmark interest rate. Following this amendments, the 2021 Term Loan Facility bears interest at an adjusted SOFR rate (with a 0.50% minimum floor) plus 2.75% per annum (or, depending on the Borrower’s first lien net leverage ratio, 2.50%). The Company may at any time or from time to time voluntarily prepay loans under the 2021 Term Loan Facility in whole or in part without premium or penalty. The 2021 Term Loan Facility requires mandatory prepayments from (i) 50% of “Excess Cash Flow” (as defined in the 2021 Credit Agreement) on an annual basis with step downs to lower percentages based on the Borrower’s leverage ratio, if applicable, (ii) net cash proceeds from the issuance or incurrence of certain indebtedness and (iii) net cash proceeds received from certain non-ordinary course disposition of assets and casualty events to the extent such net cash proceeds were not reinvested in the Company’s business within a certain specified time period. Prepayments are applied to remaining amortization installments in direct order of maturity. The remaining principal balance of the term loans are due upon maturity. The 2021 Term Loan Facility is guaranteed by Ecovyst Catalyst Technologies LLC and Ecoservices Operations Corp, subsidiaries of the Company. The obligations under the Term Facility are secured (i) by a first-priority security interest in, among other things, a pledge of substantially all of the Borrower’s and the guarantors’ assets (other than collateral securing the ABL Facility on a first-priority basis) and (ii) by a second-priority security interest in receivables, inventory, deposit accounts and other collateral of the Borrower and the U.S. subsidiary guarantors securing the ABL Facility. 2018 Term Loan Facility - Repaid in 2021 On February 8, 2018, PQ Corp entered in an agreement for a senior secured term loan facility (the “2018 Term Loan Facility”) for an aggregate principal amount of $1,267,000. The 2018 Term Loan Facility was amended on February 7, 2020 and partially repaid on June 9, 2021 with a portion of the proceeds of the 2021 Term Loan Facility. On August 1, 2021, the Company used a portion of the net cash proceeds from the sale of the Performance Chemicals business to repay the entire 2018 Term Loan Facility balance of $231,363. As a result, Ecovyst LLC wrote off $849 of unamortized deferred financing costs and $2,395 of original issue discount as debt extinguishment costs during the year ended December 31, 2022. 2020 Term Loan Facility - Repaid in 2021 On July 22, 2020, PQ Corp entered into an agreement for a new senior secured term loan facility (the “2020 Term Loan Facility”) in an aggregate principal amount of $650,000. The proceeds were used to redeem its existing $625,000 of 6.75% Senior Secured Notes due 2022 and pay the associated early redemption premiums. The 2020 Term Loan Facility was fully repaid with the proceeds of the 2021 Term Loan Facility. 5.75% Senior Unsecured Notes due 2025 - Redeemed in 2021 On December 11, 2017, PQ Corp issued $300,000 aggregate principal amount of 5.75% Senior Unsecured Notes due 2025 (the “5.75% Senior Unsecured Notes”). Concurrent with, and using a portion of the net proceeds from, the divestiture of the Performance Chemicals business on August 1, 2021, the Company redeemed the remaining principal balance of $295,000 of its 5.75% Senior Unsecured Notes due 2025. In connection with the redemption of the 5.75% Senior Unsecured Notes, PQ Corp paid a redemption premium of $8,481 which was recorded as debt extinguishment costs during the year ended December 31, 2021. In addition, previous unamortized deferred financing costs of $2,262 and original issue discount of $1,198 associated with the previously outstanding debt were written off as debt extinguishment costs during the year ended December 31, 2021. Fair Value of Debt The fair value of a financial instrument is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants. As of December 31, 2022 and 2021, the fair value of the senior secured term loan was $870,986 and $894,381, respectively. The fair value is classified as Level 2 based upon the fair value hierarchy (see Note 8 to these consolidated financial statements for further information on fair value measurements). Debt extinguishment costs resulting from Term Loan amendments As a result of amending the term loan facilities during the year ended December 31, 2021, Ecovyst LLC recorded $5,736 of new creditor and third-party financing costs as debt extinguishment costs. In addition, previous unamortized deferred financing costs of $1,725 and original issue discount of $3,664 associated with the previously outstanding debt were written off as debt extinguishment costs during the year ended December 31, 2021. As a result of the ABL Amendment, unamortized deferred financing costs of $485 and original issue discount of $107 associated with the ABL Credit Agreement were written off as debt extinguishment costs during the year ended December 31, 2021. Aggregate Long-term Debt Maturities The aggregate long-term debt maturities are: Year Amount 2023 $ 9,000 2024 9,000 2025 9,000 2026 9,000 2027 9,000 Thereafter 841,500 $ 886,500

Other Long-term Liabilities

Other Long-term Liabilities	12 Months Ended
	Dec. 31, 2022
Other Liabilities Disclosure [Abstract]
Other Long-term Liabilities	19. Other Long-term Liabilities: The following table summarizes the components of other long-term liabilities as follows: December 31, 2022 2021 Pension plan liabilities $ 6,250 $ 3,551 Other postretirement benefit plan liabilities 428 607 Derivative liabilities 2,071 — Finance lease and financing obligation liabilities 7,633 11,667 Reserve for uncertain tax positions 8,215 7,658 Other 1,249 611 $ 25,846 $ 24,094

Financial Instruments

Financial Instruments	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial Instruments	20. Financial Instruments: The Company uses interest rate related derivative instruments to manage its exposure to changes in interest rates on its variable-rate debt instruments. The Company does not speculate using derivative instruments. By using derivative financial instruments to hedge exposures to changes in interest rates, the Company exposes itself to credit risk and market risk. Credit risk is the failure of the counterparty to perform under the terms of the derivative contract. When the fair value of a derivative contract is an asset, the counterparty owes the Company, which creates credit risk for the Company. When the fair value of a derivative contract is a liability, the Company owes the counterparty and therefore, the Company is not exposed to the counterparty’s credit risk in those circumstances. The Company minimizes counterparty credit risk in derivative instruments by entering into transactions with high quality counterparties. The derivative instruments entered into by the Company do not contain credit-risk-related contingent features. Market risk is the adverse effect on the value of a derivative instrument that results from a change in interest rates. The market risk associated with the Company’s derivative instruments is managed by establishing and monitoring parameters that limit the types and degree of market risk that may be undertaken. Use of Derivative Financial Instruments to Manage Interest Rate Risk. The Company is exposed to fluctuations in interest rates on its senior secured credit facilities. Changes in interest rates will not affect the market value of such debt but will affect the Company’s interest payments over the term of the loans. Likewise, an increase in interest rates could have a material impact on the Company’s cash flow. The Company hedges the interest rate fluctuations on debt obligations through interest rate cap agreements. The Company records these agreements at fair value as assets or liabilities in its consolidated balance sheet. As the derivatives are designated and qualify as cash flow hedges, the gains or losses on the interest rate cap agreements are recorded in stockholders’ equity as a component of OCI, net of tax. Reclassifications of the gains and losses on the interest rate cap agreements into earnings are recorded as part of interest expense in the consolidated statements of income as the Company makes its interest payments on the hedged portion of its senior secured credit facilities. Fair value is determined based on estimated amounts that would be received or paid to terminate the contracts at the reporting date based on quoted market prices. In July 2016, the Company entered into interest rate cap agreements, paying a premium of $1,551 to mitigate interest rate volatility from July 2016 through July 2020 by employing varying cap rates, ranging from 1.50% to 3.00% on $1,000,000 of notional variable-rate debt. In November 2018, the Company entered into additional interest rate cap agreements to mitigate interest rate volatility from July 2020 through July 2022, with a cap rate of 3.50% on $500,000 of notional variable-rate debt and a $3,380 premium annuitized during the effective period. In February 2020, the Company restructured these agreements to lower the interest cap rate to 2.50% with an incremental $130 premium annuitized during the effective period. In March 2020, the Company again amended such interest rate cap agreements to lower the cap rate to 0.84% and paid an additional $900 premium annuitized during the effective period. The term and notional amount remained unchanged, and the total cumulative annuitized premium on the $500,000 of notional variable-rate debt was $4,410. Upon the expiration of the July 2016 interest rate cap agreements in July 2020, the Company entered into additional interest rate cap agreements to mitigate interest rate volatility from August 2020 to August 2023, with a cap rate of 1.00% on $400,000 of notional variable-rate debt. The total annuitized premium on the $400,000 of notional variable-rate debt was $137. In August 2021, PQ Corporation novated $900,000 of its interest rate caps to Ecovyst Catalyst Technologies LLC. Other than the novation, there were no other changes to the interest rate caps in connection with the novation. In January 2022, the Company entered into two new forward starting interest rate cap agreements, with notional amounts of $250,000 each and with a cap rate of 1.00%. The term for one of the interest rate caps is July 2022 through October 2024 and the term for the other is September 2023 through October 2025. The total cumulative annuitized premium is $4,450. The cap rate in effect at December 31, 2022 was 1.00%. In November 2022, the Company entered into a new interest rate cap agreement to mitigate interest rate volatility from July 2023 through July 2024, with a cap rate of 1.00% on $150,000 of notional variable-rate debt and annuitized premium of $5,268 during the effective period, and mitigate interest rate volatility from July 2024 through July 2026, with a cap rate of 1.00% and 175,000 notional variable-rate debt and annuitized premium of $6,145 during the effective period. On February 21, 2023, we amended all existing interest rate cap agreements to replace LIBOR with SOFR as the benchmark interest rate, with all other terms of the agreements remaining the same. Use of Derivative Financial Instruments to Manage Foreign Currency Risk. The Company is exposed to risks related to its net investments in foreign operations due to fluctuations in foreign currency exchange rates, and prior to the sale of the Performance Materials and Performance Chemicals businesses, particularly between the United States dollar and the Euro. The Company entered into multiple cross-currency interest rate swap arrangements with an aggregate notional amount of €280,000 in October 2019 to hedge the exposure on the net investments of certain of its Euro-denominated subsidiaries in its Performance Materials and Performance Chemicals businesses. The Company recorded these swap agreements at fair value as assets or liabilities in its consolidated balance sheet. In March 2021, as a result of the Performance Materials and Performance Chemicals divestitures, the Company settled its cross-currency swaps. At the date of settlement, the total notional value of the cross-currency swaps was $311,380. The Company paid $13,170 in cash to settle the swaps, which is included in n et cash used in investing activities, discontinued operations in the Company’s consolidated statement of cash flows for the year ended December 31, 2021, as the underlying subsidiary subject to the net investment hedging relationship was part of the Performance Chemicals business. As the derivatives were designated and qualified as net investment hedges, changes in the fair value of the swaps attributable to changes in the spot exchange rates are recognized in cumulative translation adjustment (“CTA”) within OCI and are held there until the hedged net investments are sold or substantially liquidated. Changes in the fair value of the swaps attributable to the cross currency basis spread were excluded from the assessment of hedge effectiveness and were recorded in current period earnings. Upon such sale or liquidation, the amount recognized in CTA was reclassified to earnings and reported in the same line item as the gain or loss on the liquidation of the net investments. In connection with the sales of the Performance Materials business in December 2020 and Performance Chemicals business in August 2021, amounts deferred in CTA related to the cross-currency swaps were reclassified from accumulated other comprehensive income and recognized as part of the respective losses on sale. The fair values of derivative instruments held as of December 31, 2022 and 2021 are shown below: December 31, Balance sheet location 2022 2021 Derivative assets: Derivatives designated as cash flow hedges: Interest rate caps Prepaid and other current assets $ 18,510 $ — Interest rate caps Other long-term assets 15,864 1,080 Total derivative assets $ 34,374 $ 1,080 Derivative liabilities: Derivatives designated as cash flow hedges: Interest rate caps Accrued liabilities $ — $ 1,288 Interest rate caps Other long-term liabilities 2,071 — Total derivative liabilities $ 2,071 $ 1,288 The following table shows the effect of the Company’s derivative instruments designated as hedges on accumulated other comprehensive income (loss) (“AOCI”) and the statements of income for the years ended December 31, 2022, 2021 and 2020: Years ended December 31, 2022 2021 2020 Location of gain (loss) reclassified from AOCI into income Amount of gain (loss) recognized in OCI on derivatives Amount of gain (loss) reclassified from AOCI into income Amount of gain (loss) recognized in OCI on derivatives Amount of gain (loss) reclassified from AOCI into income Amount of gain (loss) recognized in OCI on derivatives Amount of gain (loss) reclassified from AOCI into income Interest rate caps Interest (expense) income $ 32,510 $ (683) $ 3,441 $ (444) $ 167 $ (54) The following table shows the effect of the Company’s cash flow hedge accounting on the consolidated statements of income for the years ended December 31, 2022, 2021 and 2020: Location and amount of gain (loss) recognized in income on cash flow hedging relationships Years ended December 31, 2022 2021 2020 Cost of goods sold Interest (expense) income Cost of goods sold Interest (expense) income Cost of goods sold Interest (expense) income Total amounts of income and expense line items presented in the statement of income in which the effects of cash flow hedges are recorded $ (595,529) $ (37,217) $ (434,540) $ (36,990) $ (344,967) $ (50,409) The effects of cash flow hedging: Gain (loss) on cash flow hedging relationships: Interest contracts: Amount of gain (loss) reclassified from AOCI into income — (683) — (444) — (54) The amount of unrealized losses in AOCI related to the Company’s cash flow hedges that is expected to be reclassified to the consolidated statement of income over the next twelve months is $214 as of December 31, 2022. The following table shows the effect of the Company’s net investment hedges on AOCI and the consolidated statements of income for the years ended December 31, 2021 and 2020, respectively: Amount of pre-tax gain (loss) recognized in OCI on derivative Location of gain (loss) reclassified from AOCI into income Amount of gain (loss) reclassified from AOCI into income Location of gain (loss) recognized in income on derivative (amount excluded from effectiveness testing) Amount of gain (loss) recognized in income on derivative (amount excluded from effectiveness testing) Years ended Years ended Years ended 2021 2020 2021 2020 2021 2020 Cross currency swaps $ 9,787 $ (23,622) Net (loss) income from discontinued operations, net of tax (1) $ 9,754 $ 1,967 Interest (expense) income $ 545 $ 5,090

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Income Taxes	21. Income Taxes: Income (loss) before income taxes and noncontrolling interest within or outside the United States are shown below: Years ended 2022 2021 2020 Domestic $ 86,695 $ 6,185 $ (10,454) Foreign 8,040 7,756 12,669 Total $ 94,735 $ 13,941 $ 2,215 The provision (benefit) for income taxes as shown in the accompanying consolidated statements of income consists of the following: Years ended 2022 2021 2020 Current: Federal $ 18,210 $ 2,469 $ — State 3,100 1,813 1,982 Foreign 1,978 3,317 6,013 23,288 7,599 7,995 Deferred: Federal 4,544 (1,813) (58,125) State (2,288) 2,551 (2,596) Foreign (604) 3,810 661 1,652 4,548 (60,060) Provision (benefit) for income taxes $ 24,940 $ 12,147 $ (52,065) A reconciliation of income tax expense (benefit) at the U.S. federal statutory income tax rate to actual income tax expense is as follows: Years ended 2022 2021 2020 Tax at statutory rate $ 19,894 $ 2,928 $ 314 State income taxes, net of federal income tax benefit 248 3,942 (401) Changes in uncertain tax positions 558 877 164 Rate changes — 5,209 4,274 Stock compensation 1,876 197 318 Compensation Disallowance under 162(m) 3,146 466 206 Foreign tax credits — (759) (56,359) Research and development tax credits (366) (620) (717) Other, net (416) (93) 136 Provision (benefit) for income taxes $ 24,940 $ 12,147 $ (52,065) Deferred tax assets (liabilities) are comprised of the following: December 31, 2022 2021 Deferred tax assets: Net operating loss carryforwards $ 13,705 $ 24,107 Interest disallowance carryforward 228 24 Pension 879 227 Operating lease liability 6,873 7,362 Other 10,653 14,732 State credits 13,773 13,110 Foreign withholding tax credits 9,083 9,083 Valuation allowance (30,615) (39,857) $ 24,579 $ 28,788 Deferred tax liabilities: Depreciation $ (70,400) $ (71,815) Inventory (3,039) (2,899) Intangibles (63,873) (62,557) Operating lease right-of-use assets (6,763) (7,384) Other (15,910) (10,713) $ (159,985) $ (155,368) Net deferred tax liabilities $ (135,406) $ (126,580) Under the tax laws of various jurisdictions in which we operate, deductions or credits that cannot be fully utilized for tax purposes during the year may be carried forward, subject to statutory limitations, to reduce taxable income or taxes payable in a future year. As of December 31, 2022, the Company has indefinite carryforwards of $9,083 foreign withholding tax credits. The Company has recorded a full valuation allowance against the foreign withholding tax credits as it is more likely than not that the benefit from these foreign tax credits will never be realized. The Company has $13,773 of deferred tax assets related to state tax credits, which are subject to a 16-year carryforward period. A partial valuation allowance of $10,203 has been recorded due to the expected expiration of these credits before they are able to be utilized. The Company has $13,705 of deferred tax assets related to state net operating losses, which are subject to various carryforward periods of 5 to 20 years or an indefinite carryforward period. A partial valuation allowance of $10,752 has been recorded due to the expected expiration of these state net operating losses before they are able to be utilized. The change in net deferred tax liabilities for the years ended December 31, 2022 and 2021 was primarily related to activity connected to book amortization of intangible assets with no corresponding tax basis reducing those deferred tax liabilities, activity with respect to tax deductible goodwill, activity with respect to interest rate caps recorded against other comprehensive income, and activity with respect to stock compensation. The net change in the total valuation allowance was a decrease of $9,242 in 2022. The valuation allowance at December 31, 2022 was related to state net operating loss carryforwards and tax credits that, in the judgment of management, are not more likely than not to be realized. In assessing the ability to realize deferred tax assets, management considered whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Management considered the scheduled reversal of deferred tax liabilities (including the impact of available carryback and carryforward periods), projected future taxable income, and tax-planning strategies that are prudent in making this assessment. In order to fully realize deferred tax assets, the Company will need to generate future taxable income prior to the expiration of the net operating loss and credit carryforwards. The amount of the deferred tax assets considered realizable, however, could be reduced in the near term if estimates of future taxable income during the carryforward period are reduced. The cumulative unremitted earnings of foreign subsidiaries outside the United States are considered permanently reinvested, for which no withholding taxes have been provided. Such earnings are expected to be reinvested indefinitely and, as a result, no deferred tax liability has been recognized with regard to such earnings. Determination of the deferred withholding tax liability on these unremitted earnings is not practicable. The Company had total unrecognized tax benefits of $7,787 as of December 31, 2022 and 2021, respectively, and there was no activity related to these balances during the year then ended. If these amounts are recognized in future periods, it would affect the effective tax rate on income from continuing operations for the years in which they are recognized. To the extent interest and penalties are not assessed with respect to uncertain tax positions, amounts accrued will be reduced and reflected as a reduction of the overall income tax provision in the period for which the event occurs requiring the adjustment. The Company recorded accrued interest and penalties amounting to $558 as of December 31, 2022 in other long-term liabilities on its consolidated balance sheets. The Company did not record accrued interest and penalties in December 31, 2021. The Company files numerous consolidated and separate income tax returns in the U.S. federal jurisdiction and in many state and foreign jurisdictions. The following describes the open tax years, by significant tax jurisdiction, as of December 31, 2022: Jurisdiction Period United States-Federal 2011-2022 United States-State 2011-2022 Given that the Company has utilized state net operating loss in the current and prior years, the statute for examination by the state taxing authorities will typically remain open for a period following the use of such net operating loss carryforwards, extending the period for examination beyond the years indicated above. As of December 31, 2022 and 2021, the Company does not believe that there are any positions for which it is reasonably possible that the total amount of unrecognized tax benefits will significantly increase or decrease within the next twelve months. As of December 31, 2022 and 2021, the Company no longer has a federal net operating loss or foreign tax credit carryforward. Cash payments for income taxes, net of refunds, are as follows: Years ended 2022 2021 2020 Domestic $ 13,277 $ 549 $ 1,894 Foreign 359 69 29 $ 13,636 $ 618 $ 1,923 On August 16, 2022, the Inflation Reduction Act of 2022, or IRA, was signed into law. Among other things, the IRA imposes a 15% corporate alternative minimum tax for certain large corporations with average annual adjusted financial statement income in excess of $1 billion for tax years beginning after December 31, 2022, levies a 1% excise tax on net stock repurchases after December 31, 2022, and provides tax incentives to promote clean energy. Historically the Company has made discretionary share repurchases under its share repurchase programs. Beginning in 2023, these transactions will be subject to the excise tax of the IRA. Based on the Company’s historical net repurchase activity, the excise tax and the other provisions of the IRA are not expected to have a material impact on the Company’s results of operations or financial position.

Benefit Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2022
Retirement Benefits [Abstract]
Benefit Plans	22. Benefit Plans: The Company sponsors two funded defined benefit pension plans that cover certain employees. Benefits for the plans are generally based on average final pay and years of service. The Company’s funding policy is to fund the minimum required contributions consistent with statutory requirements based on actuarial computations utilizing the projected unit credit method of calculation. The Company sponsors an unfunded plan to provide health care benefits to certain retired employees. The plan pays a stated percentage of medical expenses reduced by deductibles and other coverage and obligations are paid out of the Company’s operations. The Company uses a December 31 measurement date for all of its defined benefit pension and postretirement medical plans. Of the Company’s two defined benefit pension plans, the Eco Services Hourly Pension Plan was frozen to future accruals as of December 31, 2020, and the Eco Services Pension Equity Plan was frozen to future accruals as of December 31, 2016. The retiree healthcare plan was closed to new retirees effective July 1, 2017. The Company no longer has a defined benefit pension plan covering its employees at a foreign subsidiary, as the plan was converted to a defined contribution plan during the year ended December 31, 2021. Defined Benefit Pension Plans The following tables summarize changes in the benefit obligation, plan assets and funded status of the Company’s defined benefit pension plans as well as the components of net periodic benefit cost, including key assumptions: U.S. Foreign December 31, December 31, 2022 2021 2021 Change in benefit obligation: Benefit obligation at beginning of period $ 86,465 $ 91,937 $ 22,210 Interest cost 2,569 2,210 255 Plan settlements (862) (1,795) (21,622) Benefits paid (2,552) (2,069) — Actuarial gains (18,741) (3,818) — Translation adjustment — — (843) Benefit obligation at end of the period $ 66,879 $ 86,465 $ — Change in plan assets: Fair value of plan assets at beginning of period $ 82,914 $ 80,395 $ 22,210 Actual return on plan assets (18,871) 6,383 255 Plan settlements (862) (1,795) (21,622) Benefits paid (2,552) (2,069) — Translation adjustment — — (843) Fair value of plan assets at end of the period $ 60,629 $ 82,914 $ — Funded status of the plans (underfunded) $ (6,250) $ (3,551) $ — The total actuarial gains for the year ended December 31, 2022 was $18,741, which was driven by declines in the discount rates of $18,641 and declines in general experience of $100. The total actuarial gains for the year ended December 31, 2021 was $3,818, which was driven by declines in the discount rates of $3,989 and changes in the lump sum conversion of $545 offset by changes in mortality assumptions of $204 and declines in general experience of $512. Amounts recognized in the consolidated balance sheets consist of: December 31, 2022 2021 Noncurrent liability $ (6,250) $ (3,551) Accumulated other comprehensive income (loss) (509) (672) Net amount recognized $ (6,759) $ (4,223) Amounts recognized in accumulated other comprehensive income (loss) consist of: December 31, 2022 2021 Net (loss) gain $ (1,039) $ 2,486 Gross amount recognized (1,039) 2,486 Deferred income taxes 530 (3,158) Net amount recognized $ (509) $ (672) Components of net periodic benefit cost consist of: U.S. Foreign Years ended Years ended 2022 2021 2020 2021 2020 Service cost $ — $ — $ 769 $ — $ 1,080 Interest cost 2,569 2,210 2,665 255 299 Expected return on plan assets (3,433) (4,360) (3,898) (255) (287) Amortization of net loss — — — — 95 Settlement loss (gain) recognized 38 (26) 78 2,084 — Net periodic (benefit) expense $ (826) $ (2,176) $ (386) $ 2,084 $ 1,187 All components of net periodic benefit cost other than service cost are presented within other expense (income), net in the Company’s consolidated statements of income. Components of other changes in plan assets and benefit obligations recognized in other comprehensive income consists of: December 31, 2022 2021 Net loss (gain) $ 3,563 $ (5,841) Translation adjustment — (82) Amortization or settlement recognition of net gain (loss) (38) (2,058) Total recognized in other comprehensive income 3,525 (7,981) Total recognized in net periodic benefit cost and other comprehensive income $ 2,699 $ (7,991) The net amount of projected benefit obligation and plan assets for all underfunded plans was $6,250 and $3,551 as of December 31, 2022 and 2021, respectively, and was classified as noncurrent liabilities. The following table presents selected information about the Company’s pension plans with projected benefit obligations and accumulated benefit obligations in excess of plan assets: December 31, 2022 2021 Projected benefit obligation $ 66,879 $ 86,465 Accumulated benefit obligation 66,879 86,465 Fair value of plan assets 60,629 82,914 Significant weighted average assumptions used in determining the pension obligations include the following: December 31, 2022 2021 Discount rate 5.40 % 2.90 % Rate of compensation increase (1) N/A N/A Significant weighted average assumptions used in determining net periodic benefit cost include the following: U.S. Foreign Years ended Years ended 2022 2021 2020 2021 2020 Discount rate 2.90 % 2.50 % 3.40 % 1.20 % 1.50 % Rate of compensation increase (1) N/A N/A 3.00 % 1.75 % 1.75 % Expected return on assets 4.90 % 5.60 % 5.70 % 1.20 % 1.50 % (1) Includes only plans not frozen to benefit accruals for the respective periods. The discount rate was determined by utilizing a yield curve model. The model develops a spot rate curve based on the yields available from a broad-based universe of high quality corporate bonds. The discount rate is then set as the weighted average spot rate, using the respective plan’s expected benefit cash flows as the weights. The investment objective for the plans is to generate returns sufficient to meet future obligations. The strategy to meet the objective includes generating attractive returns using higher returning assets such as equity securities and balancing risk using less volatile assets such as fixed income securities. The plans invest in an allocation of assets across the two broadly-defined financial asset categories of equity and fixed income securities. The target allocations for the plan assets across the two U.S. plans are as follows: 35% equity securities and 65% fixed income investments for the Eco Services Pension Equity Plan; and 30% equity securities and 70% fixed income investments for the Eco Services Hourly Pension Plan. The Company classifies plan assets based upon a fair value hierarchy (see Note 8 to these consolidated financial statements for further information). The classification of each asset within the hierarchy is based on the lowest level input that is significant to its measurement. The fair value hierarchy consists of three levels as follows: • Level 1—Values are unadjusted quoted prices for identical assets and liabilities in active markets accessible at the measurement date. Active markets provide pricing data for trades occurring at least weekly and include exchanges and dealer markets. Level 1 assets primarily include investments in publicly traded equity securities and mutual funds. These securities (or the underlying investments of the funds) are actively traded and valued using quoted prices for identical securities from the market exchanges. • Level 2—Inputs include quoted prices for similar assets or liabilities in active markets, quoted prices from those willing to trade in markets that are not active, or other inputs that are observable or can be corroborated by market data for the term of the instrument. Such inputs include market interest rates and volatilities, spreads and yield curves. Level 2 assets primarily consist of fixed-income securities and commingled funds that are not actively traded or whose underlying investments are valued using observable marketplace inputs. The fair value of plan assets invested in fixed-income securities is generally determined using valuation models that use observable inputs such as interest rates, bond yields, low-volume market quotes and quoted prices for similar assets. Plan assets that are invested in commingled funds are valued using a unit price or net asset value (“NAV”) that is based on the underlying investments of the fund. • Level 3—Certain inputs are unobservable (supported by little or no market activity) and significant to the fair value measurement. Unobservable inputs reflect the Company’s best estimate of what hypothetical market participants would use to determine a transaction price for the asset or liability at the reporting date. Level 3 assets include investments covered by insurance contracts and real estate funds valued using significant unobservable inputs. The following tables set forth by level, within the fair value hierarchy, plan assets at fair value: December 31, 2022 Total Level 1 Level 2 Level 3 Cash and cash equivalents $ 244 $ 244 $ — $ — Equity securities: U.S. investment funds 11,435 11,435 — — International investment funds 7,803 7,803 — — Fixed income securities: Government securities 16,209 16,209 — — Corporate bonds 24,938 24,938 — — Total $ 60,629 $ 60,629 $ — $ — December 31, 2021 Total Level 1 Level 2 Level 3 Cash and cash equivalents $ 202 $ 202 $ — $ — Equity securities: U.S. investment funds 12,150 12,150 — — International investment funds 7,816 7,816 — — Fixed income securities: Government securities 28,869 28,869 — — Corporate bonds 33,877 33,877 — — Total $ 82,914 $ 82,914 $ — $ — The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid: Year Amount 2023 $ 4,751 2024 4,518 2025 4,336 2026 4,419 2027 4,473 Years 2028-2032 22,937 The Company does not expect to contribute to its pension plans in 2023. Other Postretirement Benefit Plan The following tables summarize changes in the benefit obligation, plan assets and funded status of the Company’s other postretirement benefit plan as well as the components of net periodic benefit cost, including key assumptions: December 31, 2022 2021 Change in benefit obligation: Benefit obligation at beginning of period $ 624 $ 650 Interest cost 18 17 Benefits paid (1) (1) Premiums paid (3) (2) Actuarial gains (192) (40) Benefit obligation at end of period $ 446 $ 624 Change in plan assets: Employer contributions $ 4 $ 3 Benefits paid (1) (1) Premiums paid (3) (2) Fair value of plan assets at end of period $ — $ — Funded status of the plan (underfunded) $ (446) $ (624) The total actuarial gains for the year ended December 31, 2022 was $192, which was driven by increases in the discount rates. The total actuarial gains for the year ended December 31, 2021 was $40, which was driven by increases in the discount rates of $27, changes in mortality assumptions of $1, and general experience of $12. Amounts recognized in the consolidated balance sheets consist of: December 31, 2022 2021 Current liability $ (18) $ (17) Noncurrent liability (428) (607) Accumulated other comprehensive income (299) (59) Net amount recognized $ (745) $ (683) Amounts recognized in accumulated other comprehensive income consist of: December 31, 2022 2021 Prior service credit $ 154 $ 364 Net gain (loss) 80 (114) Gross amount recognized 234 250 Deferred income taxes (533) (309) Net amount recognized $ (299) $ (59) Components of net periodic benefit cost consist of: Years ended 2022 2021 2020 Interest cost $ 18 $ 17 $ 19 Amortization of prior service credit (210) (232) (232) Amortization of net loss 3 5 1 Net periodic benefit $ (189) $ (210) $ (212) All components of net periodic benefit cost other than service cost are presented within other expense (income), net in the Company’s consolidated statements of income. Components of other changes in plan assets and benefit obligations recognized in other comprehensive income consists of: December 31, 2022 2021 Net gain $ (192) $ (40) Amortization of prior service credit 210 232 Amortization or settlement recognition of net loss (3) (5) Total recognized in other comprehensive income $ 15 $ 187 Total recognized in net periodic benefit cost and other comprehensive income $ (174) $ (23) The discount rate used in determining the other postretirement benefit plan obligation was 5.50% and 2.90% as of December 31, 2022 and 2021, respectively. The discount rate used in determining net periodic benefit cost was 2.90%, 2.60% and 3.50% for the years ended December 31, 2022, 2021 and 2020, respectively. There was no rate of interest crediting rate, as there are no cash balance accounts associated with this plan. The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid: Year Amount 2023 $ 18 2024 19 2025 20 2026 21 2027 22 Years 2028-2032 138 The Company expects to contribute $18 to the retiree health plan in 2023. There are no expected Medicare subsidy receipts expected in future periods. Defined Contribution Plans The Company also has defined contribution plans covering domestic employees of the Company and a foreign subsidiary. The Company recorded expenses of $7,113, $7,097 and $6,467 related to these plans for the years ended December 31, 2022, 2021 and 2020, respectively.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2022
Stock-Based Compensation [Abstract]
Stock-Based Compensation	23. Stock-Based Compensation: The Company has an equity incentive plan under which it grants common stock awards to employees, directors and affiliates of the Company. As of December 31, 2022, 10,065,830 shares of common stock were available for issuance under the plan. The Company settles these awards through the issuance of new shares. Modifications Sale of Performance Chemicals As described in Note 9 to these consolidated financial statements, the Company’s Board of Directors declared a special cash dividend of $3.20 per share to stockholders of record as of the close of business on August 12, 2021. The dividend declaration also included a dividend equivalent for all unvested restricted stock units, performance stock units and restricted stock awards (collectively, the “awards”) as of August 23, 2021 equal to $3.20 per award. Additionally, the Company’s Board of Directors approved a reduction in the strike price on all outstanding vested and unvested stock options by the amount of the dividend payment. Further, with respect to stock options and awards held by employees of Performance Chemicals at the time of the sale (see Note 5 to these consolidated financial statements), the Company’s Board of Directors approved modifications to the post-termination stock option exercise, and stock option and award vesting periods. The modifications provided that all stock options held by Performance Chemicals employees that were vested as of the date of the sale are eligible to be exercised for a period of one year from the date of the sale. Additionally, modifications to unvested stock options and awards allowed holders to continue to vest in those instruments under the original terms of the instruments for a period of up to one year from the date of sale, depending on the award. The terms of the modifications to the Performance Chemicals awards are contingent upon the employee providing continued service to the Buyer. The modifications impacted all holders of the Company’s stock options and awards, and along with modifications for a retired executive during the same period, resulted in incremental stock-based compensation expense recognized at the time of the modifications of $6,667 during the year ended December 31, 2021. Of this amount, $2,635 was included in loss from discontinued operations, net of tax on the Company’s consolidated statements of income. Sale of Performance Materials As described in Note 9 to these consolidated financial statements, the Company’s Board of Directors declared a special cash dividend of $1.80 per share to stockholders of record as of the close of business on December 21, 2020. The dividend declaration also included a dividend equivalent for all unvested awards as of December 21, 2020 equal to $1.80 per award. Additionally, the Company’s Board of Directors approved a reduction in the strike price on all outstanding vested and unvested stock options by the amount of the dividend payment. Further, with respect to stock options and awards held by employees of Performance Materials at the time of the sale (see Note 4 to these consolidated financial statements), the Company’s Board of Directors approved modifications to the post-termination stock option exercise, and stock option and award vesting periods. The modifications provided that all stock options held by Performance Materials employees that were vested as of the date of the sale are eligible to be exercised for a period of one year from the date of the sale. Additionally, modifications to unvested stock options and awards allowed holders to continue to vest in those instruments under the original terms of the instruments for a period of one year from the date of sale. The terms of the modifications to the Performance Materials awards are contingent upon the employee providing continued service to the Purchaser. The modifications impacted all holders of the Company’s stock options and awards, and resulted in incremental stock-based compensation expense recognized at the time of the modifications of $2,144 during the year ended December 31, 2020. Of this amount, $654 was included in loss from discontinued operations, net of tax on the Company’s consolidated statements of income. Stock Options The Company has issued stock options to purchase Ecovyst Inc. common stock as part of its equity incentive compensation program. There are various vesting conditions associated with stock options issued prior to the launch of the Company’s initial pubic offering (“IPO”) in September 2017, including satisfaction of certain service and/or performance based conditions. Subsequent to the IPO, the Company’s stock option grants have been subject to graded vesting conditions based on service. The maximum contractual term of the Company’s stock options is ten years. The following table summarizes the activity of common stock options for the period from December 31, 2019 through the year ended December 31, 2022: Number of Options Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value Outstanding at December 31, 2019 2,374,357 $ 11.44 Exercised (43,250) $ 8.64 Forfeited (157,776) $ 9.23 Outstanding at December 31, 2020 2,173,331 $ 9.84 (1) Exercised (208,500) $ 3.56 Forfeited (39,996) $ 3.53 Expired (40,484) $ 14.52 Outstanding at December 31, 2021 1,884,351 $ 6.99 (2) Exercised (199,970) $ 3.06 Forfeited (51,860) $ 3.98 Expired (111,524) $ 11.97 Outstanding at December 31, 2022 1,520,997 $ 7.24 3.36 $ 4,720 Exercisable at December 31, 2022 1,236,041 $ 8.13 3.30 $ 3,171 (1) Reflects the impact of the reduction in the strike price on all outstanding vested and unvested stock options by $1.80 per share as described above. (2) Reflects the impact of the reduction in the strike price on all outstanding vested and unvested stock options by $3.20 per share as described above. The aggregate intrinsic value per the above table represents the difference between the fair value the Company’s common stock on the last trading day of the reporting period (determined in accordance with the plan terms) and the exercise price of in-the-money stock options multiplied by the respective number of stock options as of that date. The total intrinsic value of stock options exercised during the years ended December 31, 2022 and 2021 and the resulting tax benefits recognized by the Company were $1,306 and $1,767, respectively, and were not material for the year ended December 31, 2020. Additionally, cash proceeds received by the Company from the exercise of stock options were not material for the years ended December 31, 2022, 2021, and 2020. There were no stock option awards granted during the years ended December 31, 2022, 2021 and 2020. The Company uses the Black-Scholes option pricing model to determine the fair value of its stock option grants. Restricted Stock Awards, Restricted Stock Units and Performance Stock Units Restricted Stock Awards The Company has granted restricted stock awards subject to vesting conditions based on (1) service only, (2) performance only, or (3) a combination of service and performance conditions, dependent on which event occurs first. The vesting requirements for the majority of these awards were based upon the achievement of a performance condition. As defined in the award agreements, each award subject to the performance condition fully vests upon the occurrence of a defined liquidity event upon which certain investment funds affiliated with CCMP receive proceeds exceeding certain thresholds. Although achievement of the performance condition is subject to continued service with the Company, the terms of awards issued with performance conditions stipulate that the performance vesting condition can be attained for a period of six months following separation from service under certain circumstances, depending on the means of separation from the Company and subject to other factors such as individual separation agreements. The same performance vesting condition for the Company’s restricted stock awards also governs the achievement of the performance vesting condition for the Company’s stock options. As of December 31, 2022, all of the Company’s outstanding unvested restricted stock awards were subject to the performance vesting condition. In addition to restricted stock awards, the Company has granted restricted stock units and performance stock units as part of its equity incentive compensation program. Restricted Stock Units Each restricted stock unit provides the recipient with the right to receive a share of common stock subject to graded vesting terms based on service, which generally requires one year of service for members of the Company’s board of directors and three years of service for employees. The value of the restricted stock units granted by the Company is based on the average of the high and low trading prices of the Company’s common stock on the NYSE on the preceding trading day, in accordance with the Company’s policy for valuing such awards. Compensation expense related to the restricted stock units is recognized on a straight-line basis over the respective vesting period. Performance Stock Units 2019 Grants During the year ended December 31, 2022, the Compensation Committee of the Company’s Board of Directors (“Compensation Committee”) certified the achievement of the performance metrics for the three 2020 Grants The Company granted 456,311 performance stock units (at target) during the year ended December 31, 2020. The performance stock units granted in 2020 provide the recipients with the right to receive shares of common stock dependent 50% on the achievement of a Company-specific financial performance target and 50% on a total shareholder return (“TSR”) goal, and are generally subject to the provision of service through the vesting date of the award. The Company-specific financial performance target and the TSR goal are measured independently of each other, but achievement of both of the metrics is measured based on the same three-year performance period from January 1, 2020 through December 31, 2022. The TSR goal is based on the Company’s relative TSR performance against the companies included in the Russell 2000 Index over the performance period. Achievement of the Company-specific financial performance target is measured based on the average levels of achievement across the performance period. Depending on the Company’s performance against the predetermined thresholds for achievement, each performance stock unit award recipient is eligible to earn a percentage of the target number of shares granted to the recipient, ranging from zero to 200%. The performance stock units, to the extent earned, will vest on the date the Compensation Committee certifies the achievement of the performance metrics for the three The value of the portion of the performance stock units granted during the year ended December 31, 2020 eligible to be earned based on the achievement of the Company-specific financial performance target was measured on the same basis as that of the restricted stock units, and based on the target number of shares granted; because the performance vesting conditions affect the ability of the recipients to vest in the awards, they are not factored into the fair value measure of the award. Compensation expense related to such performance stock units is recognized ratably over the requisite service period, and the Company must assess the probability that the performance conditions will be met each reporting period and the level at which they are estimated to be attained. Should the probability assessment change during a given reporting period, the total compensation cost (both recognized and unrecognized) will be adjusted to reflect the revised assessment. The TSR goal, which determines how much of the 50% of the performance stock units granted during 2020 may be earned, is considered a market condition as opposed to a vesting condition. Because a market condition is not considered a vesting condition, it is reflected in the grant date fair value of an award and the associated compensation cost based on the fair value of the award is recognized over the performance period, regardless of whether the Company actually achieves the market condition or the level of achievement, as long as service is provided by the recipient. The Company used a Monte Carlo simulation to estimate the $24.11 weighted average fair value of the portion of the awards subject to the TSR goal, with the following weighted average assumptions: Expected dividend yield — % Risk-free interest rate 1.56 % Expected volatility 28.57 % Expected term (in years) 2.95 2021 Grants The Company granted 211,985 performance stock units (at target) during the year ended December 31, 2021 that provide the recipients with the right to receive shares of common stock dependent on the achievement of a TSR goal, and are generally subject to the provision of service through the vesting date of the award. The performance period for the TSR goal is measured based on a three Expected dividend yield — % Risk-free interest rate 0.20 % Expected volatility 41.70 % Expected term (in years) 2.95 2022 Grants During the year ended December 31, 2022, the Company granted 295,132 performance stock units (at target) under its equity incentive plan. The performance stock units granted during the year ended December 31, 2022 provide the recipients with the right to receive shares of common stock dependent on the achievement of a TSR goal, and are generally subject to the provision of service through the vesting date of the award. The performance period for the TSR goal is measured based on a three The Company used a Monte Carlo simulation to estimate the $8.82 weighted average fair value of the awards, with the following weighted average assumptions: Expected dividend yield — % Risk-free interest rate 1.51 % Expected volatility 44.51 % Expected term (in years) 2.91 Award Activity The following table summarizes the activity of restricted stock awards, restricted stock units and performance stock units for the period from December 31, 2019 through the year ended December 31, 2022: Restricted Stock Awards Restricted Stock Units Performance Stock Units Number of Weighted Average Grant Date Fair Value (per share) Number of Weighted Average Grant Date Fair Value (per share) Number of Weighted Average Grant Date Fair Value (per share) Nonvested as of December 31, 2019 1,546,130 $ 8.17 1,628,436 $ 15.83 550,676 (2) $ 15.41 Granted — $ — 1,158,605 $ 16.60 456,311 $ 20.29 Vested (29,760) $ 12.32 (816,866) $ 16.17 — $ — Forfeited (619,355) $ 8.04 (129,036) $ 16.28 (41,251) $ 15.95 Nonvested as of December 31, 2020 897,015 $ 13.80 (1) 1,841,139 $ 16.14 965,736 (2) $ 17.69 Granted — $ — 1,697,623 $ 15.39 211,985 $ 13.21 Vested — $ — (773,619) $ 16.00 — $ — Forfeited (263,291) $ 15.31 (1) (257,722) $ 16.03 (60,166) $ 17.11 Nonvested as of December 31, 2021 633,724 $ 15.84 (1) 2,507,421 $ 15.68 1,117,555 (2) $ 16.91 Granted — $ — 2,779,690 $ 10.28 295,132 $ 8.82 Vested (84,903) $ 8.83 (1,550,969) $ 15.08 (496,442) $ 15.41 Forfeited (271,765) $ 15.84 (1,271,424) $ 12.27 (276,713) $ 12.33 Nonvested as of December 31, 2022 277,056 $ 15.66 2,464,718 $ 11.73 639,532 (2) $ 16.32 (1) Reflects the impact of the modification on all unvested restricted stock awards as described above. (2) Based on target. The total fair value of restricted stock awards that vested during the years ended December 31, 2022, 2021 and 2020 was $749, $0 and $510, respectively. The total fair value of restricted stock units that vested during the years ended December 31, 2022, 2021 and 2020 was $15,579, $11,507 and $11,269, respectively. The total fair value of performance stock units that vested during the years ended December 31, 2022, 2021 and 2020 was $5,277, $0 and $0, respectively. Total Stock-Based Compensation Expense For the years ended December 31, 2022, 2021 and 2020, total stock-based compensation expense for the Company on a continuing operations basis was $20,632, $31,838 and $17,194, respectively. The associated income tax benefit recognized in the statements of income for the years ended December 31, 2022, 2021 and 2020 was $2,799, $7,735 and $3,933, respectively. As of December 31, 2022, there was no unrecognized compensation cost related to nonvested stock options or nonvested restricted stock awards subject to service vesting conditions. As of December 31, 2022, unrecognized compensation cost was $13,966 for restricted stock units and $1,650 for performance stock units considered probable of vesting. The weighted-average period over which these costs are expected to be recognized at December 31, 2020 is 1.24 years for the restricted stock units and 1.03 years for the performance stock units. No expense has been recognized for any stock options subject to the performance condition for the years ended December 31, 2022, 2021 and 2020, and no expense has been recognized for any restricted stock awards subject to the performance condition for the years ended December 31, 2021 and 2020, as the performance-based criteria was not achieved nor considered probable of achievement. During the year ended December 31, 2022, $749 of stock-based compensation expense was recognized for a modification to a set of restricted stock awards subject to the performance condition for an individual whose awards immediately vested in connection with a separation agreement. Restricted stock awards and stock options issued with performance conditions vest based on the occurrence of a defined liquidity event upon which certain investment funds affiliated with CCMP receive proceeds exceeding certain thresholds. If an exit event occurs that exceeds the defined threshold, then all of these restricted stock awards and stock options of the Company vest 100%, with no potential for partial vesting or excess achievement. If an exit event or events occur with no further possibility of meeting the defined threshold, then all of the Company’s restricted stock awards and stock options subject to the performance vesting condition will be forfeited. In addition to the defined liquidity event, subsequent to the Company’s IPO, the performance vesting condition can also be achieved if the average closing trading price of the Company’s common stock on the NYSE over any consecutive ten-day trading period equals or exceeds a price that would be equivalent to the achievement of the threshold proceeds to CCMP. See Note 24 to these consolidated financial statements for further information on the number of restricted stock awards and stock options outstanding subject to performance-based vesting.

Earnings per Share

Earnings per Share	12 Months Ended
	Dec. 31, 2022
Earnings Per Share [Abstract]
Earnings per Share	24. Earnings per Share: Basic earnings per share is calculated as income (loss) available to common stockholders, divided by the weighted average number of common shares outstanding during the period. The weighted average number of common shares outstanding during the period for the computation of basic earnings per share excludes restricted stock awards that have legally been issued but are nonvested during the period, as the sale of these shares is prohibited pending satisfaction of certain vesting conditions by the award recipients in order to earn the rights to the shares (see Note 23 to these consolidated financial statements for further information regarding outstanding nonvested restricted stock awards). Diluted earnings per share is calculated as income (loss) available to common stockholders, divided by the weighted average number of common and potential common shares outstanding during the period, if dilutive. Potential common shares reflect (1) unvested restricted stock awards and restricted stock units with service vesting conditions, (2) performance stock units with vesting conditions considered probable of achievement and (3) options to purchase common stock, all of which have been included in the diluted earnings per share calculation using the treasury stock method. The reconciliation from basic to diluted weighted average shares outstanding is as follows: Years ended 2022 2021 2020 Weighted average shares outstanding – Basic 133,601,322 136,167,384 135,528,977 Dilutive effect of unvested common shares and restricted stock units with service conditions, performance stock units considered probable of vesting and assumed stock option exercises and conversions 1,486,850 1,541,547 921,976 Weighted average shares outstanding – Diluted 135,088,172 137,708,931 136,450,953 Basic and diluted income (loss) per share are calculated as follows: Years ended 2022 2021 2020 Numerator: Income from continuing operations attributable to Ecovyst Inc. $ 69,795 $ 1,794 $ 54,280 Income (loss) from discontinued operations attributable to Ecovyst Inc. 3,902 (141,743) (333,051) Net income (loss) attributable to Ecovyst Inc. $ 73,697 $ (139,949) $ (278,771) Denominator: Weighted average shares outstanding – Basic 133,601,322 136,167,384 135,528,977 Weighted average shares outstanding – Diluted 135,088,172 137,708,931 136,450,953 Net income (loss) per share: Basic income per share - continuing operations $ 0.52 $ 0.01 $ 0.40 Diluted income per share - continuing operations $ 0.52 $ 0.01 $ 0.40 Basic (loss) income per share - discontinued operations $ 0.03 $ (1.04) $ (2.46) Diluted (loss) income per share - discontinued operations $ 0.03 $ (1.03) $ (2.44) Basic income (loss) per share $ 0.55 $ (1.03) $ (2.06) Diluted income (loss) per share $ 0.55 $ (1.02) $ (2.04) The table below presents the details of the Company’s weighted average equity-based awards outstanding during each respective year that were excluded from the calculation of diluted earnings per share: Years ended 2022 2021 2020 Restricted stock awards with performance only targets not yet achieved 539,688 839,432 1,225,855 Stock options with performance only targets not yet achieved 309,984 373,105 507,461 Anti-dilutive restricted stock awards, restricted stock units and performance stock units 20,497 6,214 1,453,120 Anti-dilutive stock options 776,594 244,473 846,049 Restricted stock awards and stock options with performance only vesting conditions are not included in the dilution calculation, as the performance targets have not been achieved nor were probable of achievement as of the end of the respective periods. Certain stock options to purchase shares of common stock were excluded from the computation of diluted earnings per share for the respective periods, because the combination of the options’ exercise price and remaining unamortized stock-based compensation expense was greater than the average market price of the common shares. Anti-dilutive awards are not included in the dilution calculation, as their inclusion would have the effect of increasing diluted income per share.

Commitments and Contingent Liab

Commitments and Contingent Liabilities	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingent Liabilities	25. Commitments and Contingent Liabilities: Environmental Contingencies There is a risk of environmental impact in chemical manufacturing operations. The Company’s environmental policies and practices are designed to comply with existing laws and regulations and to minimize the possibility of significant environmental impact. The Company is also subject to various other lawsuits and claims with respect to matters such as governmental regulations, labor and other actions arising out of the normal course of business. All claims that are probable and reasonably estimable have been accrued for in the Company’s consolidated financial statements, some of which are described in detail within this note. When these matters are ultimately concluded and determined, the Company believes that there will be no material adverse effect on its consolidated financial position, results of operations or liquidity. The Company has recorded a reserve of $306 and $410 as of December 31, 2022 and 2021, respectively, to address remaining subsurface remedial and wetlands/marsh management activities at the Company’s Martinez, CA site. Although currently a sulfuric acid regeneration plant, the site originally was operated by Mountain Copper Company (“Mococo”) as a copper smelter. Also, the site sold iron pyrite to various customers and allowed their customers to deposit waste iron pyrite cinder and slag on the site. The property is adjacent to Peyton Slough, where Mococo had a permitted discharge point from its process. In 1997, the San Francisco Bay Regional Water Quality Control Board (“RWQCB”) required characterization and remediation of Peyton Slough for Copper, Zinc and Acidic Soils. Various remediation activities were undertaken and completed, and the site has received final concurrence from the Army Corps with respect to the completed work. The RWQCB has agreed that Eco Services LLC, a wholly owned subsidiary of the Company (“Eco Services”), has achieved the goals for vegetative cover. The current marsh condition is being sustained by the opening and subsequent closing of the tide gates on a once per year basis. The Company is continuing to indicate to the RWQCB a plan to involve Contra Costa County and work towards development of an alliance for operating, maintaining and funding the tide gates is appropriate. The Company is currently in the process of obtaining permits for the long-term maintenance of Peyton Slough. As of December 31, 2022 and 2021, the Company has recorded a reserve of $102 and $306, respectively, for subsurface remediation and the Soil Vapor Extraction Project at the Company’s Dominguez, CA site. In the 1980s and 1990s, the EPA and the Los Angeles Regional Water Quality Control Board conducted investigations of the site due to historic chlorinated pesticide and chlorinated solvent use. Soil and groundwater beneath the site were impacted by chlorinated solvents and associated breakdown products, petroleum hydrocarbons, chlorinated pesticides and metals. A Corrective Measures Plan approved in October 2011 requires (1) soil vapor extraction (“SVE”) in affected areas, (2) covering of unpaved areas containing pesticide impacted soil, and (3) annual groundwater monitoring of the perched water-bearing zone. Annual groundwater sampling and soil vapor monitoring indicates that the SVE system has been effective in reducing subsurface contaminant levels. The Company is moving in the direction of rendering the SVE system dormant and potentially closing this matter within the next few years following rebound testing, including the preparation of an updated long-term Operations and Maintenance Plan as requested by the California Department of Toxic Substances Control. Letters of Credit At December 31, 2022, the Company had outstanding letters of credit of $4,043. Letters of credit are guarantees of payment to third parties. The Company’s letters of credit are used primarily as collateral for various items, including environmental, energy and insurance payments. The letters of credit are supported by the Company’s ABL facility.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2022
Related Party Transactions [Abstract]
Related Party Transactions	26. Related Party Transactions: The Company maintains certain policies and procedures for the review, approval and ratification of related party transactions to ensure that all transactions with selected parties are fair, reasonable and in the Company’s best interests. All significant relationships and transactions are separately identified by management if they meet the definition of a related party or a related party transaction. Related party transactions include transactions that occurred during the year, or are currently proposed, in which the Company was or will be a participant, and for which any related person had or will have a direct or indirect material interest. All related party transactions are reviewed, approved and documented by the appropriate level of the Company’s management in accordance with these policies and procedures. Joint Venture Agreement The Company entered into a joint venture agreement (the “ZI Partnership Agreement”) in 1988 with Shell Catalysts & Technologies, an affiliate of Royal Dutch Shell plc, to form Zeolyst International, a 50/50 joint venture partnership (the “Partnership”). Under the terms of the ZI Partnership Agreement, the Partnership leases certain land used in its Kansas City production facilities from Ecovyst. This lease, which has been recorded as an operating lease, provided for rental payments to the Company of $310, $305 and $295 during the years ended December 31, 2022, 2021 and 2020, respectively. The terms of this lease are evergreen as long as the ZI Partnership Agreement is in place. The Partnership had no sales to the Company during the years ended December 31, 2022, 2021 and 2020, respectively. The Partnership purchases certain of its raw materials from the Company and is charged for various manufacturing costs incurred at the Company’s Kansas City production facility. The amount of these costs charged to the Partnership were $23,699, $19,976 and $16,869 for the years ended December 31, 2022, 2021 and 2020, respectively. Certain administrative, marketing, engineering, management-related, and research and development services are provided to the Partnership by the Company. During the years ended December 31, 2022, 2021 and 2020, the Partnership was charged $13,908, $12,871 and $12,727, respectively, for these services. In addition, the Partnership was charged certain product demonstration costs of $1,621, $2,204 and $1,768 during the years ended December 31, 2022, 2021 and 2020, respectively. These charges to the Partnership are recorded as reductions in either cost of goods sold or selling, general and administrative expenses in the consolidated statements of income, depending on the nature of the expenditures. As of December 31, 2022 and 2021, the Company had an accounts receivable from the Partnership of $2,636 and $2,943. As of December 31, 2022 and 2021, there were no accounts payable with the Partnership. Other From time to time, the Company makes sales to and purchases raw materials from portfolio companies of funds that are affiliated with INEOS Capital Partners. The Company had sales of $10,880, $3,923 and $11,212 to companies affiliated with INEOS Capital Partners during the years ended December 31, 2022, 2021, and December 31, 2020, respectively. Purchases of raw materials from companies affiliated with INEOS Capital Partners were immaterial for the years ended December 31, 2022, 2021 and 2020.

Quarterly Financial Summary (Un

Quarterly Financial Summary (Unaudited)	12 Months Ended
	Dec. 31, 2022
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Summary (Unaudited)	27. Quarterly Financial Summary (Unaudited): The quarterly financial data is presented for each quarter of the two most recent fiscal years to reflect the material retrospective change in 2021, which was previously disclosed in 2021, to reflect the sale of the Performance Chemicals business as discontinued operations. See Note 5 of these consolidated financial statements for further discussion on the transaction. The following tables summarize the Company’s quarterly financial results during the years ended December 31, 2022 and 2021: 2022 First Second Third Fourth Sales $ 179,714 $ 225,172 $ 232,533 $ 182,740 Gross profit 47,735 59,859 67,669 49,367 Operating income 16,436 27,411 38,536 22,002 Net income from continuing operations 7,875 19,245 21,325 21,350 Net income from discontinued operations, net of tax — — — 3,902 Net income 7,875 19,245 21,325 25,252 Net income attributable to Ecovyst Inc. 7,875 19,245 21,325 25,252 Earnings per common share - basic: Continued operations $ 0.06 $ 0.14 $ 0.16 $ 0.17 Discontinued operations $ — $ — $ — $ 0.03 Net earnings per share - basic $ 0.06 $ 0.14 $ 0.16 $ 0.20 Earnings per common share - diluted: Continued operations $ 0.06 $ 0.14 $ 0.16 $ 0.17 Discontinued operations $ — $ — $ — $ 0.03 Net earnings per share - diluted $ 0.06 $ 0.14 $ 0.16 $ 0.20 Weighted average shares outstanding: Basic 137,684,773 138,035,764 132,622,105 125,962,111 Diluted 138,749,065 139,149,560 134,096,839 127,538,343 2021 First Second Third Fourth Sales $ 126,624 $ 146,952 $ 167,428 $ 170,197 Gross profit 30,119 38,473 53,644 54,425 Operating income 2,482 11,652 22,494 17,979 Net (loss) income from continuing operations (2,748) (7,870) 4,689 7,723 Net (loss) income from discontinued operations, net of tax (89,770) 6,520 (75,872) 17,712 Net (loss) income (92,518) (1,350) (71,183) 25,435 Less: Net income attributable to the noncontrolling interest - discontinued operations 117 140 76 — Net (loss) income attributable to Ecoyvst Inc. (92,635) (1,490) (71,259) 25,435 (Loss) Earnings per common share - basic: Continuing operations $ (0.02) $ (0.06) $ 0.03 $ 0.06 Discontinued operations $ (0.66) $ 0.05 $ (0.56) $ 0.13 Net (loss) earnings per share - basic $ (0.68) $ (0.01) $ (0.52) $ 0.19 (Loss) Earnings per common share - diluted: Continuing operations $ (0.02) $ (0.06) $ 0.03 $ 0.06 Discontinued operations $ (0.66) $ 0.05 $ (0.55) $ 0.13 Net (loss) earnings per share - diluted $ (0.68) $ (0.01) $ (0.52) $ 0.18 Weighted average shares outstanding: Basic 136,006,082 136,095,060 136,129,591 136,256,601 Diluted 136,006,082 136,095,060 137,354,427 137,528,028

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2022
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	28. Supplemental Cash Flow Information: The following table presents supplemental cash flow information for the Company, which includes activity from both continuing and discontinued operations: Years ended 2022 2021 2020 Cash paid during the year for: Income taxes, net of refunds $ 25,556 $ 11,843 $ 35,013 Interest (1) 35,370 59,040 90,291 Non-cash investing activity (2) : Capital expenditures acquired on account but unpaid as of the year end 4,653 6,116 16,245 (1) Cash paid for interest is shown net of capitalized interest for the periods presented and excludes $2,307 and $4,963 of net interest proceeds on swaps designated as net investment hedges for the years ended December 31, 2021 and 2020, respectively, which are included within cash flows from investing activities, discontinued operations in the Company’s consolidated statements of cash flows. (2) For the supplemental non-cash information on lease liabilities arising from obtaining right-of-use lease assets, see Note 14 to these consolidated financial statements for additional details. The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets as of December 31, 2022, 2021 and 2020 to the total of the same amounts shown in the consolidated statements of cash flows for the years then ended: December 31, 2022 2021 2020 Cash and cash equivalents $ 110,920 $ 140,889 $ 113,377 Restricted cash included in prepaid and other current assets — — 1,640 Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows $ 110,920 $ 140,889 $ 115,017

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2022
Subsequent Events [Abstract]
Subsequent Events	29. Subsequent Events: On February 9, 2023, we amended the 2021 Term Loan Facility to replace LIBOR with secured overnight financing rate (“SOFR”) as the benchmark interest rate, and on February 17, 2023, we amended the ABL Facility to replace LIBOR with SOFR as the benchmark interest rate with respect to U.S. dollar-denominated borrowings. See Note 18 of these consolidated financial statements for further discussion. On February 21, 2023, we also amended all existing interest rate caps to replace the LIBOR with SOFR as the benchmark interest rate. See Note 20 of these consolidated financial statements for further discussion. Other than this item, the Company has evaluated subsequent events since the balance sheet date and determined that there are no additional matters to disclose.

Schedule I - Condensed Financia

Schedule I - Condensed Financial Information of Parent	12 Months Ended
	Dec. 31, 2022
Condensed Financial Information Disclosure [Abstract]
Condensed Financial Information	SCHEDULE I ECOVYST INC. AND SUBSIDIARIES (PARENT) CONDENSED FINANCIAL INFORMATION CONDENSED STATEMENTS OF INCOME (in thousands) Years ended 2022 2021 2020 Stock compensation expense $ 20,632 $ 39,523 $ 25,200 Equity in net (income) loss from subsidiaries (94,329) 100,426 253,571 Net income (loss) 73,697 (139,949) (278,771) Other comprehensive income (loss), net of tax: 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) (2,804) Total other comprehensive income 11,784 10,196 83 Comprehensive income (loss) $ 85,481 $ (129,753) $ (278,688) SCHEDULE I ECOVYST INC. AND SUBSIDIARIES (PARENT) CONDENSED FINANCIAL INFORMATION CONDENSED BALANCE SHEETS (in thousands, except share and per share amounts) December 31, December 31, ASSETS Investment in subsidiaries $ 707,229 $ 740,737 Total assets $ 707,229 $ 740,737 LIABILITIES Total liabilities $ — $ — STOCKHOLDERS' EQUITY Common stock (0.01 par); authorized shares 450,000,000; issued shares 139,571,272 and 137,820,971 on December 31, 2022 and 2021, respectively; outstanding shares 122,186,238 and 136,938,758 on December 31, 2022 and 2021, respectively 1,396 1,378 Preferred stock (0.01 par); authorized shares 50,000,000; no shares issued or outstanding on December 31, 2022 and 2021, respectively — — Additional paid-in capital 1,091,475 1,073,409 Accumulated deficit (242,010) (315,707) Treasury stock, at cost; shares 17,385,034 and 882,213 on December 31, 2022 and 2021, respectively (149,624) (12,551) Accumulated other comprehensive (loss) income 5,992 (5,792) Total equity 707,229 740,737 Total liabilities and equity $ 707,229 $ 740,737 SCHEDULE I ECOVYST INC. AND SUBSIDIARIES (PARENT) CONDENSED FINANCIAL INFORMATION CONDENSED STATEMENTS OF CASH FLOWS (in thousands) Years ended 2022 2021 2020 Cash flows from operating activities: Net income (loss) $ 73,697 $ (139,949) $ (278,771) Adjustments to reconcile net income to net cash provided by operating activities: Equity in net income from subsidiaries (94,329) 100,426 253,571 Stock compensation expense 20,632 39,523 25,200 Net cash provided by operating activities — — — Cash flows from investing activities: Distribution from subsidiaries — 435,593 243,749 Net cash provided by investing activities — 435,593 243,749 Cash flows from financing activities: Dividends paid to stockholders — (435,593) (243,749) Net cash used in financing activities — (435,593) (243,749) Effect of exchange rate changes on cash, cash equivalents and restricted cash — — — Net change in cash, cash equivalents and restricted cash — — — Cash, cash equivalents and restricted cash at beginning of period — — — Cash, cash equivalents and restricted cash at end of period of continuing operations $ — $ — $ — SCHEDULE I ECOVYST INC. AND SUBSIDIARIES (PARENT) CONDENSED FINANCIAL INFORMATION NOTES TO CONDENSED SCHEDULE I 1. Description of Ecovyst Inc. and Subsidiaries Ecovyst Inc. (“Ecovyst” or the “Parent Company”) is a holding company that conducts substantially all of its business operations through its wholly owned subsidiary, Ecovyst Catalyst Technologies LLC. As specified in certain of Ecovyst Catalyst Technologies LLC’s debt agreements, there are restrictions on the ability of Ecovyst Catalyst Technologies LLC to make payments to its stockholder, Ecovyst, on behalf of its equity interests (refer to Note 18 to the Ecovyst consolidated financial statements for further information regarding Ecovyst debt). 2. Basis of Presentation The accompanying condensed Parent Company financial statements are required in accordance with Rule 4-08(e)(3) of Regulation S-X. These condensed financial statements have been presented on a “parent-only” basis. Under a parent-only presentation, the Parent Company’s investment in its consolidated subsidiary is presented under the equity method of accounting. Under the equity method, the investment in subsidiary is stated at cost plus contributions and equity in undistributed income (loss) of the subsidiary, less distributions received since the date of acquisition. These parent-only financial statements should be read in conjunction with Ecovyst’s audited consolidated financial statements. 3. Stock-Based Compensation Refer to Note 23 of the notes to the Ecovyst consolidated financial statements for a description of stock-based compensation. 4. Dividends Paid On December 14, 2020, Ecovyst’s Board of Directors declared a special cash dividend of $1.80 per share, using proceeds and cash on hand from the sale of the Performance Materials business. The dividend was paid on December 29, 2020 to the Company’s stockholders of record at the close of business on December 21, 2020. On August 4, 2021, Ecovyst’s Board of Directors declared a special cash dividend of $3.20 per share, using the proceeds from the sale of the Performance Chemicals business. The dividend was paid on August 23, 2021 to the Company’s stockholders of record at the close of business on August 12, 2021.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation On December 14, 2020, the Company completed the sale of its Performance Materials business for $650,000 and on August 1, 2021, completed the sale of its Performance Chemicals business for $1,100,000. T he financial results of these business are presented as discontinued operations in the consolidated financial statements for the 2021 and 2020 periods presented. See Note 4 and Note 5 for more information on these transactions. The Company has two uniquely positioned specialty businesses: Ecoservices provides sulfuric acid recycling to the North American refining industry for the production of alkylate and provides on-purpose virgin sulfuric acid for water treatment, mining, and industrial applications; and Catalyst Technologies provides finished silica catalysts and catalyst supports necessary to produce high strength and high stiffness plastics and, through its Zeolyst joint venture, supplies zeolites used for catalysts that help produce renewable fuels, remove nitric oxide from diesel engine emissions as well as sulfur from fuels during the refining process. The Company’s regeneration services product group, which is a part of the Company’s Ecoservices segment, typically experiences seasonal fluctuations as a result of higher demand for gasoline products in the summer months and lower demand in the winter months. These demand fluctuations result in higher sales and working capital requirements in the second and third quarters. The notes to the consolidated financial statements, unless otherwise indicated, are on a continuing operations basis.
Principles of Consolidation	Principles of Consolidation. The consolidated financial statements include the accounts of the Company and its controlled subsidiaries. Investments in affiliated companies are recorded at cost plus the Company’s equity in their undistributed earnings. All intercompany transactions have been eliminated.
Foreign Currency Transactions and Translations Policy	Foreign Currency Translation. All assets and liabilities of foreign subsidiaries and affiliated companies are translated to U.S. dollars using exchange rates in effect at the balance sheet date. Adjustments resulting from translation of the balance sheets are included in stockholders’ equity as part of accumulated other comprehensive income (loss). Adjustments resulting from translation of certain intercompany loans, which are not considered permanent and are denominated in foreign currencies, are included in other expense (income), net in the consolidated statements of income. The Company considers intercompany loans to be of a permanent or long-term nature if management expects and intends that the loans will not be repaid. For the years ended December 31, 2022, 2021 and 2020, all intercompany loan arrangements were determined to be non-permanent based on management’s intention as well as actual lending and repayment activity. Therefore, the foreign currency transaction gains or losses associated with the int ercompany loans were recorded in the consolidated statements of income for the years ended December 31, 2022, 2021 and 2020. Income and expense items are translated at average exchange rates during the year. Net foreign currency exchange (gains) and losses included in other expense (income), net were $978, $4,716 and $(5,264) for the years ended December 31, 2022, 2021 and 2020 , respectively. The n et foreign currency (gains) and losses realized during these years were primarily driven by the non-permanent intercompany debt denominated in local currency and translated to U.S. dollars.
Cash and Cash Equivalents	Cash and Cash Equivalents. Cash and cash equivalents include highly liquid investments with original terms to maturity of 90 days or less from the time of purchase.
Restricted Cash	Restricted Cash. Restricted cash, which is restricted as to withdrawal or usage, is classified separately from cash and cash equivalents on the Company’s consolidated balance sheets. The Company had no restricted cash balances as of December 31, 2022 and 2021.
Accounts Receivable and Allowance for Doubtful Accounts	Accounts Receivable and Allowance for Credit Losses. Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The allowance for credit losses is the Company’s best estimate of the amount of probable credit losses in its existing accounts receivable and is reviewed during each reporting period over their contractual life. The Company recognizes an allowance for credit losses based on historical collection experience, current regional economic and market conditions, the aging of accounts receivable and assessments of current creditworthiness of customers. Account balances are charged against the allowance when the Company believes it is probable that the associated receivables will not be recovered. If the financial condition of the Company’s customers were to deteriorate resulting in an impairment of their ability to make payments, additional allowances may be required. The Company does not have any off-balance sheet credit exposure related to its customers. The Company’s allowance for credit losses was not material as of December 31, 2022 and 2021.
Inventories	Inventories. Certain domestic inventories are stated at the lower of cost or market and valued using the last-in, first-out (“LIFO”) method. All other inventories are stated at the lower of cost or net realizable value and valued using the weighted average cost or first-in, first-out (“FIFO”) methods.
Property, Plant and Equipment	Property, Plant and Equipment. Property, plant and equipment are carried at cost and include expenditures for new facilities, major renewals and betterments. The Company capitalizes the cost of furnace rebuilds as part of property, plant and equipment. Maintenance, repairs and minor renewals are charged to expense as incurred. The Company capitalizes certain internal costs associated with the implementation of purchased software. When property, plant and equipment is retired or otherwise disposed of, the net carrying amount is eliminated with any gain or loss on disposition recognized in earnings at that time. Depreciation is provided on the straight-line method based on the estimated useful lives of the assets, which generally range from 15 to 33 years for buildings and improvements and 3 to 10 years for machinery and equipment. Leasehold improvements are depreciated using the straight-line method based on the shorter of the useful life of the improvement or remaining lease term. The Company capitalizes the interest cost associated with the development and construction of significant new plant and equipment and depreciates that amount over the lives of the related assets. Capitalized interest recorded during the years ended December 31, 2022, 2021 and 2020 was $1,442, $1,235 and $1,788, respectively.
Leases	Lea ses . The Company has operating and finance lease agreements with remaining lease terms as of December 31, 2022 of up to 23 years, including leases of land, buildings, railcars, vehicles, manufacturing equipment and general office equipment. Some leases include options to terminate or extend for one or more years. These options are incorporated in the Compan y’s lease term when it is reasonably certain that the option will be exercised. Some leases include options to purchase, which the Company assesses under the guidance to determine if these leases should be classified as finance lease agreements. When the Company enters into an arrangement, at inception, the Company determines if the arrangement contains a lease and whether that lease meets the classification criteria of a finance or operating lease. Some of the Company’s lease arrangements contain lease components (e.g. minimum rent payments) and non-lease components (e.g. maintenance). The Company accounts for the lease and non-lease components separately based on the estimated standalone price of each component. Certain of the Company’s lease agreements include rental payments that are adjusted periodically for an index or rate and these are initially measured using the index or rate in effect at the commencement date. Variable lease expense is recognized in the period in which the obligation for those payments is incurred. The Company’s lease agreements do not contain any material residual value guarantees or material restrictive covenants. The Company recognizes a right-of-use lease asset and lease liability at the lease commencement date based on the present value of the remaining lease payments over the lease term. The Company assesses its leasing arrangements to determine the rate implicit in the lease arrangement. Historically, the Company’s leasing arrangements do not contain the information necessary to determine the rate implicit in the lease. As such, the Company utilizes its incremental borrowing rate over the relevant lease term, which is the rate of interest that it would have to pay to borrow on a collateralized basis over a similar term an amount equal to the lease payments in a similar economic environment. The incremental borrowing rate is determined at the lease commencement date and is developed utilizing a readily available market interest rate curve adjusted for the Company’s credit quality. The Company has elected to use a portfolio approach to apply its incremental borrowing rate to individual leases based on lease term and geographic jurisdiction. Short-term leases, which have an initial term of twelve months or less, are not recorded on the Company’s balance sheet. Lease expense for operating leases is recognized on a straight-line basis over the lease term. Lease expense for financing leases is bifurcated into two components, with the amortization expense component of the right-of-use asset recognized on a straight-line basis and the interest expense component recognized using the effective interest method over the lease term. The amortization expense component of the right-of-use lease asset is included in cost of goods sold and in selling, general and administrative expenses and the interest expense component is included in interest expense, net on the consolidated statements of income.
Spare Parts	Spare Parts. Spare parts are maintained by the Company’s facilities to keep machinery and equipment in working order. Spare parts are capitalized and included in other long-term assets. Spare parts are measured at cost and are not depreciated or expensed until utilized; however, reserves may be provided on aged spare parts. When a spare part is utilized as part of an improvement to property, plant and equipment, the carrying value is depreciated over the applicable life once placed in service. Otherwise, the spare part is expensed and charged as a cost of production when utilized.
Investments in Affiliated Companies	Investments in Affiliated Companies. Investments in affiliated companies are accounted for using the equity method of accounting if the investment provides the Company with the ability to exercise significant influence, but not control, over the investee. Significant influence is generally deemed to exist if the Company’s ownership interest in the voting stock of the investee ranges between 20% and 50%, although other factors, such as representation on the investee’s board of directors and the impact of commercial arrangements, are considered in determining whether the equity method of accounting is appropriate. Under the equity method of accounting, the investments in equity-method investees are recorded in the consolidated balance sheets as investments in affiliated companies, and the Company’s share of the investees’ earnings or losses, together with other than temporary impairments in value, is recorded as equity in net income from affiliated companies in the consolidated statements of income. Any differences between the Company’s cost of an equity method investment and the underlying equity in the net assets of the investment, such as fair value step-ups resulting from acquisitions, are accounted for according to their nature and impact the amounts recognized as equity in net income from affiliated companies in the consolidated statements of income. The Company evaluates all distributions received from its equity method investments using the nature of distribution approach. Under this approach, the Company evaluates the nature of activities of the investee that generated the distribution. The distributions received are either classified as a return on investment, which is presented as a component of operating activities on the Company’s consolidated statements of cash flows, or as a return of investment, which is presented as a component of investing activities on the Company’s consolidated statements of cash flows. The Company evaluates its equity method investments for impairment whenever events or changes in circumstances indicate that the carrying amounts of such investments may be impaired. If a decline in the value of an equity method investment is determined to be other than temporary, a loss is recorded in earnings in the current period.
Goodwill and Intangible Assets	Goodwill and Intangible Assets. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. The Company is required to test goodwill associated with each of its reporting units for impairment at least annually and whenever events or circumstances indicate that it is more likely than not that goodwill may be impaired. The Company performs its annual goodwill impairment test as of October 1. Goodwill is tested for impairment at the reporting unit level. In performing tests for goodwill impairment, the Company is able to use its discretion to first perform an optional qualitative assessment about the likelihood of the carrying value of a reporting unit exceeding its fair value. The qualitative assessment need not be applied to all reporting units. If the Company determines that it is more likely than not that the fair value of a reporting unit is less than its carrying amount based on the qualitative assessment, the Company will perform a quantitative goodwill impairment test to identify the potential goodwill impairment and measure the amount of the goodwill impairment loss, if any, to be recognized for that reporting unit. For the annual assessments in 2022 and 2021, the Company bypassed the option to perform the qualitative assessment and proceeded directly to performing the quantitative goodwill impairment test for each of its reporting units. The quantitative test identifies both the potential existence of impairment and the amount of impairment loss. In applying the quantitative test, the Company calculates and compares the reporting unit’s estimated fair value to its carrying value, including goodwill. If the fair value of a reporting unit exceeds its carrying value, goodwill is not impaired. If the carrying value of a reporting unit exceeds its fair value, an impairment loss is recognized for the amount by which the carrying value exceeds the reporting unit’s fair value. An impairment loss cannot exceed the carrying value of goodwill assigned to a reporting unit and the loss establishes a new basis in the goodwill. Subsequent reversal of an impairment loss is not permitted. For intangible assets other than goodwill, definite-lived intangible assets are amortized over their respective estimated useful lives. Intangible assets with indefinite lives are not amortized, but rather are tested for impairment at least annually or more frequently if events occur or circumstances change that would more likely than not reduce the fair value of the intangible asset below its carrying amount. The Company tests its indefinite-lived intangible assets as of October 1 of each year in conjunction with its annual goodwill impairment test.
Impairment Assessment of Long-Lived Assets	Impairment Assessment of Long-Lived Assets. The Company performs an impairment review of property, plant and equipment and definite-lived intangible assets when facts and circumstances indicate that the carrying value of an asset or asset group may not be recoverable from its undiscounted future cash flows. When evaluating long-lived assets for impairment, if the carrying amount of an asset or asset group is found not to be recoverable, a potential impairment loss may be recognized. An impairment loss is measured by comparing the carrying amount of the asset or asset group to its fair value. Fair value is determined using quoted market prices when available, or other techniques including discounted cash flows. The Company’s estimates of future cash flows involve assumptions concerning future operating performance, economic conditions and technological changes that may affect the future useful lives of the assets.
Derivative Financial Instruments	Derivative Financial Instruments. The Company utilizes certain derivative financial instruments to enhance its ability to manage risk, including exposure to interest rate fluctuations that exist as part of ongoing business operations. Derivative instruments are entered into for periods consistent with the related underlying exposures and do not constitute positions independent of those exposures. All derivatives designated as hedges are recognized on the consolidated balance sheets at fair value. The Company may designate a derivative as a hedge of the fair value of a recognized asset or liability or of an unrecognized firm commitment (fair value hedge), a hedge of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (cash flow hedge), a foreign currency fair-value or cash-flow hedge (foreign currency hedge), or a hedge of a net investment in a foreign operation (net investment hedge). The Company’s hedging strategies include derivatives designated as cash flow hedges and net investment hedges. Changes in the fair value of a derivative that is highly effective and that is designated and qualifies as a cash flow hedge are recorded in other comprehensive income and subsequently reclassified into earnings in the same period(s) in which the hedged transaction affects earnings. Changes in the fair value of a derivative that is highly effective and that is designated and qualifies as a hedge of a net investment in a foreign operation are recorded in the foreign currency translation adjustment account within accumulated other comprehensive income, where the associated gains and losses will remain until such time that the hedged net investment (foreign subsidiary) is sold or liquidated. Changes in the fair value of a derivative that is not designated or does not qualify as a hedge are recorded in the consolidated statements of income. Cash flows from derivative instruments are reported in the same cash flow category as the cash flows from the items being hedged.
Fair Value Measurement	Fair Value Measurements. The Company measures fair value using the guidelines under U.S. generally accepted accounting principles (“GAAP”). An asset’s fair value is defined as the price at which the asset could be exchanged in a current transaction between market participants. A liability’s fair value is defined as the amount that would be paid to transfer the liability to a market participant, not the amount that would be paid to settle the liability with the creditor. The carrying values of cash, accounts receivable, accounts payable and accrued liabilities approximate fair value due to the short-term nature of these items. Derivative contracts Derivative assets and liabilities can be exchange-traded or traded over-the-counter (“OTC”). The Company generally values exchange-traded derivatives using models that calibrate to market transactions and eliminate timing differences between the closing price of the exchange-traded derivatives and their underlying instruments. OTC derivatives are valued using market transactions and other market evidence whenever possible, including market-based inputs to models, model calibration to market transactions, broker or dealer quotations or alternative pricing sources with reasonable levels of price transparency. When models are used, the selection of a particular model to value an OTC derivative depends on the contractual terms of, and specific risks inherent in, the instrument as well as the availability of pricing information in the market. The Company generally uses similar models to value similar instruments. Valuation models require a variety of inputs, including contractual terms, market prices and rates, forward curves, measures of volatility, and correlations of such inputs. For OTC derivatives that trade in liquid markets, such as forward contracts, swaps and options, model inputs can generally be corroborated by observable market data by correlation or other means, and model selection does not involve significant management judgment. As of December 31, 2022, the Company had interest rate caps that were fair valued using Level 2 inputs. In addition, the Company applies a credit valuation adjustment to reflect credit risk which is calculated based on credit default swaps. To the extent that the Company’s net exposure under a specific master agreement is an asset, the Company utilizes the counterparty’s default swap rate. If the net exposure under a specific master agreement is a liability, the Company utilizes a default swap rate comparable to Ecovyst. The credit valuation adjustment is added to the discounted fair value to reflect the exit price that a market participant would be willing to receive to assume the Company’s liabilities or that a market participant would be willing to pay for the Company’s assets.
Treasury stock	Treasury Stock. The Company records repurchases of its common stock for treasury at cost. Upon the reissuance of the Company’s common stock from treasury, differences between the proceeds from reissuance and the average cost of the treasury stock are credited or charged to capital in excess of par value to the extent of prior credits related to the reissuance of treasury stock. If no such credits exist, the differences are charged to retained earnings.
Revenue Recognition	Revenue Recognition. In determining the appropriate amount of revenue to be recognized as the Company fulfills its obligations under its agreements, the Company performs the following steps: (i) identification of the contract with the customer; (ii) determination of whether the promised goods or services are performance obligations, including whether they are distinct in the context of the contract; (iii) measurement of the transaction price; (iv) allocation of the transaction price to the performance obligations based on estimated selling prices; and (v) recognition of revenue when (or as) the Company satisfies each performance obligation. The Company identifies a contract when an agreement with a customer creates legally enforceable rights and obligations, which occurs when a contract has been approved by both parties, the parties are committed to perform their respective obligations, each party’s rights and payment terms are clearly identified, commercial substance exists and it is probable that the Company will collect the consideration to which it is entitled. The Company may offer rebates to customers who have reached a specified volume of optional purchases. The Company recognizes rebates given to customers as a reduction of revenue based on an allocation of the cost of honoring rebates earned and claimed to each of the underlying revenue transactions that result in progress by the customer toward earning the rebate. Rebates are recognized at the time revenue is recorded. The Company measures the rebate obligation based on the estimated amount of sales that will result in a rebate at the adjusted sales price per the respective sales agreement.
Shipping and Handling	Shipping and Handling. Amounts billed to a customer in a sale transaction related to shipping and handling, if any, represent revenues earned for the goods provided and are classified as revenue. Costs related to shipping and handling of products shipped to customers are classified as cost of goods sold.
Research and Development	Research and Development. Research and development costs of $7,232, $7,499 and $7,137 for the years ended December 31, 2022, 2021 and 2020, respectively, were expensed as incurred and reported in selling, general and administrative expenses in the consolidated statements of income.
Income Taxes	Income Taxes. The Company operates within multiple taxing jurisdictions and is subject to tax filing requirements and potential audits within these jurisdictions. The Company uses the asset and liability method in accounting for income taxes. Deferred tax assets and liabilities are recorded for temporary differences between the tax basis of assets and liabilities and their reported amounts in the financial statements, using statutory tax rates in effect for the year in which the differences are expected to reverse. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the results of operations in the period that includes the enactment date. The Company evaluates its deferred tax assets each period to ensure that estimated future taxable income will be sufficient in character (e.g., capital gain versus ordinary income treatment), amount and timing, to result in their realizability. A valuation allowance is recorded to reduce the carrying amounts of deferred tax assets, unless it is more likely than not that those assets will be realized. Generally, APB 23 of ASC Topic 740, Income Taxes (“ASC 740”), provides guidance with respect to establishing deferred income taxes on earnings from foreign subsidiaries, to the extent that these earnings are considered to be available for repatriation. Further, ASC 740-30 requires that deferred taxes be established with respect to the earnings of a foreign subsidiary, unless existing tax law provides a means by which the investment in a subsidiary can be recovered tax-free. The Company has determined that it is able to repatriate the non-permanently reinvested earnings of its foreign subsidiaries in a tax-free manner. As such, the Company is able to asset, for purposes of ASC 740-30, that no deferred income taxes are needed with respect to earnings from foreign subsidiaries. The Company recognizes a financial statement benefit for positions taken for tax return purposes when it will be more likely than not (i.e. greater than 50%) that the positions will be sustained upon tax examination, based solely on the technical merits of the tax positions. Otherwise, no tax benefit is recognized. The tax benefits recognized are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. The Company recognizes potential accrued interest and penalties related to unrecognized tax benefits as a component of income tax expense. Tax examinations are often complex as tax authorities may disagree with the treatment of items reported by the Company and may require several years to resolve. These accrued liabilities represent a provision for taxes that are reasonably expected to be incurred on the basis of available information but which are not certain.
Environmental Expenditures	Environmental Expenditures. Environmental expenditures that pertain to current operations or to future revenues are expensed or capitalized consistent with the Company’s capitalization policy for property, plant and equipment. Expenditures that result from the remediation of an existing condition caused by past operations and that do not contribute to current or future revenues are expensed. Liabilities are recognized for remedial activities when the remediation is probable and the cost can be reasonably estimated. Recoveries of expenditures for environmental remediation are recognized as assets only when recovery is deemed probable.
Deferred Finance Costs	Deferred Financing Costs. Financing costs incurred in connection with the issuance of long-term debt are deferred and presented as a direct reduction from the related debt instruments on the Company’s consolidated balance sheets. Deferred financing costs are amortized as interest expense using the effective interest method over the respective terms of the associated debt instruments.
Stock-Based Compensation	Stock-Based Compensation. The Company applies the fair value based method to account for stock options, restricted stock awards, restricted stock units and performance stock units issued in connection with its equity incentive plans. Stock-based compensation expense is recognized on a straight-line basis over the vesting periods of the respective awards, and the Company accounts for forfeitures of equity incentive awards as they occur. In connection with the vesting of restricted stock awards, restricted stock units and performance stock units, shares of common stock may be delivered to the Company by employees to satisfy withholding tax obligations at the instruction of the employee award holders. These transactions when they occur are accounted for as stock repurchases by the Company, with the shares returned to treasury stock at a cost representing the payment by the Company of the tax obligations on behalf of the employees in lieu of shares for the vesting event.
Pensions and Postretirement Benefits	Pensions and Postretirement Benefits. The Company sponsors two funded defined benefit pension plans that cover certain employees. Benefits for the plans are generally based on average final pay and years of service. The Company’s funding policy is to fund the minimum required contributions consistent with statutory requirements based on actuarial computations utilizing the projected unit credit method of calculation. The pension plans’ assets include equity and fixed income securities. Certain assumptions are made regarding the occurrence of future events affecting pension costs, such as mortality, withdrawal, disa blement and retirement, changes in compensation and benefits, and discount rates to reflect the time value of money. The major elements in determining pension income and expense are pension liability discount rates and the expected return on plan assets. The Company references rates of return on high-quality, fixed income investments when estimating the discount rate, and the expected period over which payments will be made based upon historical experience. The long-term rate of return used to calculate the expected return on plan assets is the average rate of return estimated to be earned on invested funds for providing pension benefits. In addition to pension benefits, the Company provides certain health care benefits for employees who meet age, participation and length of service requirements at retirement. The Company uses explicit assumptions using the best estimates available of the plan’s future experience. Principal actuarial assumptions include: discount rates, present value factors, retirement age, participation rates, mortality rates, cost trend rates, Medicare reimbursement rates and per capita claims cost by age. Current interest rates as of the measurement date are used for discount rates in present value calculations. The Company also has defined contribution plans covering domestic employees of the Company and certain subsidiaries.
Contingencies	Contingencies. Certain conditions may exist as of the date the financial statements are issued, which may result in a loss to the Company but which will only be resolved when one or more future events occur or fail to occur. The Company’s management and its legal counsel assess such contingent liabilities, and such assessment inherently involves an exercise of judgment. In assessing loss contingencies related to legal proceedings that are pending against the Company or unasserted claims that may result in such proceedings, the Company and legal counsel evaluate the perceived merits of any legal proceedings or unasserted claims as well as the perceived merits of the amount of relief sought or expected to be sought therein. If the assessment of a contingency indicates that it is probable that a loss has been incurred and the amount of the liability can be estimated, then the estimated liability is accrued in the Company’s financial statements. If the assessment indicates that a loss contingency is not probable, but is reasonably possible, or is probable but cannot be estimated, then the nature of the contingent liability, together with an estimate of the range of possible loss if determinable and material, would be disclosed. Loss contingencies considered remote are generally not disclosed unless they involve guarantees, in which case the nature of the guarantee would be disclosed, including the approximate term, how the guarantee arose, and the events or circumstances that would require the guarantor to perform under the guarantee.
Use of Estimates	Use of Estimates. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Reclassifications and Correction of Errors	Reclassification and Correction of an Error. Certain reclassifications and correction of an error have been made to the historical presentation of the consolidated financial statements and the notes accompanying the consolidated financial statements.
New Accounting Pronouncements Policy	Recently Adopted Accounting Standards In November 2021, the Financial Accounting Standards Board (“FASB”) issued guidance that requires entities to provide certain disclosures when they (1) have received government assistance and (2) use a grant or contribution accounting model by analogy to other accounting guidance. Previously, there was no guidance under GAAP on recognizing or measuring government grants to business entities. The new guidance does not provide any additional guidance on this topic; rather, it only provides guidance on required disclosures for business entities that receive government assistance and apply another grant or contribution accounting framework by analogy. The new guidance is effective for fiscal years beginning after December 15, 2021, with early adoption permitted, and can be applied either prospectively or retrospectively. The Company adopted the new guidance as required on January 1, 2022; the Company has not identified any significant government assistance or grants subject to the scope of the guidance upon adoption. In March 2020 and January 2021, the FASB issued guidance to address certain accounting consequences from the anticipated transition from the use of the London Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates. The new guidance contains practical expedients for reference rate reform related activities that impact debt, leases, derivatives and other contracts. The guidance is optional and may be elected over time as reference rate reform activities occur. The time period through which the practical expedients provided in the guidance is available was set to expire on December 31, 2022, but was extended through December 31, 2024 by the FASB in December 2022. During the year ended December 31, 2020, the Company elected to apply the hedge accounting expedients related to probability and the assessments of effectiveness for future LIBOR-indexed cash flows to assume that the index upon which future hedged transactions will be based on matches the index of the corresponding derivatives. Application of these expedients preserves the presentation of derivatives consistent with past presentation. In February 2023, the Company amended the 2021 Term Loan Facility, the ABL Facility and all existing interest rate caps agreements to replace LIBOR with a secured overnight financing rate (“SOFR”) as the benchmark interest rate. See Notes 18 and 20 to these consolidated financial statements for additional information. The Company plans to utilize the practical expedients under the guidance with respect to the transition of its debt facilities and interest rate hedging arrangements to SOFR, with no material impact to its consolidated financial statements anticipated. Accounting Standards Not Yet Adopted as of December 31, 2022 In October 2021, the FASB issued guidance that requires contract assets and contract liabilities acquired in a business combination to be recognized and measured by the acquirer on the acquisition date in accordance with revenue recognition guidance. Under current GAAP, contract assets and contract liabilities acquired in a business combination are recorded by the acquirer at fair value. The new guidance creates an exception to the general recognition and measurement principles related to business combinations, and is expected to result in the acquirer recognizing contract assets and liabilities at the same amounts recorded by the acquiree. The new guidance is effective for business combinations occurring during fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, with early adoption permitted. The Company adopted the new guidance effective January 1, 2023 as required, and will apply the guidance prospectively to business combinations that occur after the adoption date.

Performance Materials Divesti_2

Performance Materials Divestiture (Tables)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2020
Performance Materials
Dispositions [Line Items]
Discontinued operations	The following table summarizes the results of discontinued operations for the periods presented: Year ended 2020 Sales $ 342,738 Cost of goods sold 251,917 Selling, general and administrative expenses 33,195 Other operating expense, net 18,289 Operating income 39,337 Equity in net income from affiliated companies (37) Interest expense, net (1) 16,210 Other income, net (3,481) Loss on sale of Performance Materials 70,878 Loss from discontinued operations before income tax (44,233) Provision for income taxes 58,008 Loss from discontinued operations, net of tax $ (102,241) (1) The closing of the transaction triggered the Company’s obligation to provide partial repayment under both its Amended and Restated Term Loan Credit Agreement, dated May 4, 2016, and its New Term Loan Credit Agreement, dated as of July 22, 2020. As such, interest expense has been allocated to discontinued operations on the basis of the Company’s required refinancing of debt repayment provision of $275,787 of the 2018 Term Loan Facility and its required repayment of $188,722 of the 2020 Term Loan Facility.	The following is a reconciliation of the loss recorded on the sale: Net proceeds received from the sale of Performance Materials $ 624,256 Transaction costs (13,161) Net assets derecognized (681,973) Loss on sale of Performance Materials $ (70,878)

Performance Chemicals Divesti_2

Performance Chemicals Divestiture (Tables)	12 Months Ended
	Dec. 31, 2021
Performance Chemicals
Dispositions [Line Items]
Discontinued operations	The following is a reconciliation of the loss recorded on the sale: Net proceeds received from the sale of the Performance Chemicals business $ 978,449 Transaction costs (35,402) Net assets derecognized (1,093,277) Loss on sale of the Performance Chemicals business $ (150,230) The following table summarizes the results of discontinued operations related to Performance Chemicals for the periods presented: Years ended 2022 2021 2020 Sales $ — $ 389,870 $ 614,704 Cost of goods sold — 284,220 492,302 Selling, general and administrative expenses — 29,856 43,749 Goodwill impairment charge — 75,080 260,000 Other operating expense, net (1) 2,409 14,765 33,144 Loss on sale of the Performance Chemicals business — 150,230 — Operating loss (2,409) (164,281) (214,491) Equity in net income from affiliated companies — (111) (172) Interest expense, net (2) — 10,730 16,570 Other income, net — (6,210) (1,089) Loss from discontinued operations before income tax (2,409) (168,690) (229,800) (Benefit) Provision for income taxes (6,311) (24,886) 3,943 Loss from discontinued operations, net of tax $ 3,902 $ (143,804) $ (233,743) (1) The Company reclassified transaction costs that were previously recorded to this line item and included those charges in the line item Loss on sale of the Performance Chemicals business during the years ended December 31, 2021 and 2020 . (2) Upon the close of the transaction, the Company used a portion of the net proceeds to repay a portion of its outstanding debt amounting to $526,363. Refer to Note 18 for additional details on the repayment of outstanding debt. Prior to the Company’s debt refinancing in June 2021, the Company’s outstanding term loan facilities had required refinancing of debt with repayment provisions. As a result, interest expense has been allocated to discontinued operations on the basis of the Company’s total repayment of $526,363.

Chem32 Acquisition (Tables)

Chem32 Acquisition (Tables)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Business Combination and Asset Acquisition [Abstract]
Purchase Price Allocation		The following table sets forth the calculation and allocation of the purchase price to the identifiable net assets acquired with respect to the Acquisition, which was complete as of December 31, 2021: Purchase Cash paid, net of cash acquired $ 42,639 Holdback 1,000 Total consideration, net of cash acquired $ 43,639 Recognized amounts of identifiable assets acquired and liabilities assumed: Receivables $ 1,368 Inventories 204 Prepaid and other current assets 351 Property, plant and equipment 5,046 Other intangible assets 22,100 Other long-term assets 187 Fair value of assets acquired 29,256 Accounts payable 207 Accrued liabilities 188 Fair value of net assets acquired 28,861 Goodwill 14,778 $ 43,639
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination	The valuation of the intangible assets acquired and the related weighted-average amortization periods were as follows: Amount Weighted-Average Intangible assets subject to amortization: Customer relationships $ 16,000 10 Technical know-how 3,800 10 Non-compete agreements 700 5 Trade names 1,600 10 Total intangible assets subject to amortization $ 22,100

Revenue from Contracts with C_2

Revenue from Contracts with Customers Revenue from Contracts with Customers (Tables)	12 Months Ended
	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The Company’s portfolio of products are integrated into a variety of end uses, which are described in the table below: Key End Uses Key Products Clean fuels, emission control & other • Refining hydrocracking catalysts • Emission control catalysts • Catalysts used in production of renewable fuels • Catalyst activation • Aluminum sulfate solution • Ammonium bisulfite solution Polymers & engineered plastics • Catalysts for high-density polyethylene and chemicals syntheses • Antiblocks for film packaging • Niche custom catalyst Regeneration and treatment services • Sulfuric acid regeneration services • Treatment services Industrial, mining, & automotive • Sulfur derivatives for industrial production • Sulfuric acid for mining • Sulfuric derivatives for nylon production The following table disaggregates the Company’s sales, by segment and end use, for the years ended December 31, 2022, 2021 and 2020: Year ended December 31, 2022 Ecoservices Catalyst Technologies (2) Total Clean fuels, emission control & other $ 28,966 $ — $ 28,966 Polymers & engineered plastics — 117,687 117,687 Regeneration and treatment services (1) 342,645 — 342,645 Industrial, mining & automotive 330,861 — 330,861 Total segment sales $ 702,472 $ 117,687 $ 820,159 Year ended December 31, 2021 Ecoservices Catalyst Technologies (2) Total Clean fuels, emission control & other $ 25,673 $ — $ 25,673 Polymers & engineered plastics — 110,688 110,688 Regeneration and treatment services (1) 262,026 — 262,026 Industrial, mining & automotive 212,814 — 212,814 Total segment sales $ 500,513 $ 110,688 $ 611,201 Year ended December 31, 2020 Ecoservices Catalyst Technologies (2) Total Clean fuels, emission control & other $ 11,955 $ — $ 11,955 Polymers & engineered plastics — 94,007 94,007 Regeneration and treatment services (1) 233,122 — 233,122 Industrial, mining & automotive 156,836 — 156,836 Total segment sales $ 401,913 $ 94,007 $ 495,920 (1) As described in Note 1, the Company experiences seasonal sales fluctuations to customers in the regeneration and treatment services end use. (2) Excludes the Company’s proportionate share of sales from the Zeolyst International and Zeolyst C.V. joint ventures (collectively, the “Zeolyst Joint Venture”) accounted for using the equity method (see Note 12 to these condensed consolidated financial statements for further information).

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements, Recurring	The following table presents information about the Company’s assets and liabilities that were measured at fair value on a recurring basis as of December 31, 2022 and 2021, and indicates the fair value hierarchy of the valuation techniques the Company utilized to determine such fair value. December 31, Quoted Prices in Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Derivative assets: Interest rate caps (Note 20) $ 34,374 $ — $ 34,374 $ — Derivative liabilities: Interest rate caps (Note 20) $ 2,071 $ — $ 2,071 $ — December 31, Quoted Prices in Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Derivative assets: Interest rate caps (Note 20) $ 1,080 $ — $ 1,080 $ — Derivative liabilities: Interest rate caps (Note 20) $ 1,288 $ — $ 1,288 $ —

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2022
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The following table presents the components of accumulated other comprehensive income (loss), net of tax, as of December 31, 2022 and 2021: December 31, 2022 2021 Amortization and unrealized gains on pension and postretirement plans, net of tax of $(4,078) and $(4,957) $ 12,132 $ 14,808 Net changes in fair values of derivatives, net of tax of $(9,057) and $(759) 26,636 2,254 Foreign currency translation adjustments, net of tax of $8,177 and $8,177 (32,776) (22,854) Accumulated other comprehensive income (loss) $ 5,992 $ (5,792) The following table presents the tax effects of each component of other comprehensive income (loss) for the years ended December 31, 2022, 2021 and 2020: Years ended 2022 2021 2020 Pre-tax amount Tax benefit/ After-tax amount Pre-tax amount Tax benefit/ After-tax amount Pre-tax amount Tax benefit/ After-tax amount Defined benefit and other postretirement plans: Amortization of net gains and (losses) $ (3,383) $ 836 $ (2,547) $ 10,917 $ (2,757) $ 8,160 $ 2,627 $ (791) $ 1,836 Amortization of prior service cost (210) 52 (158) (232) 58 (174) (232) 58 (174) Settlement gain (loss) 39 (10) 29 2,059 (515) 1,544 64 (16) 48 Benefit plans, net (3,554) 878 (2,676) 12,744 (3,214) 9,530 2,459 (749) 1,710 Net gain from hedging activities 33,194 (8,812) 24,382 3,885 (971) 2,914 1,569 (392) 1,177 Foreign currency translation (1) (9,922) — (9,922) (9,202) 6,954 (2,248) 1,784 (6,251) (4,467) Other comprehensive income (loss) $ 19,718 $ (7,934) $ 11,784 $ 7,427 $ 2,769 $ 10,196 $ 5,812 $ (7,392) $ (1,580) (1) The income tax benefit or expense included in other comprehensive income is attributed to the portion of foreign currency translation associated with the Company’s cross-currency interest rate swaps, for which the tax effect is based on the applicable U.S. deferred income tax rate. See Note 20 to these consolidated financial statements for information regarding the Company’s cross currency interest rate swaps. The following table presents the changes in accumulated other comprehensive income (loss), net of tax, by component for the years ended December 31, 2022 and 2021: Defined benefit Net gain (loss) from hedging activities Foreign Total December 31, 2020 $ 5,278 $ (660) $ (19,883) $ (15,265) Other comprehensive income before reclassifications 5,622 2,580 11,043 19,245 Amounts reclassified from accumulated other comprehensive income (1) 3,908 334 (14,014) (9,772) Net current period other comprehensive income (loss) 9,530 2,914 (2,971) 9,473 December 31, 2021 14,808 2,254 (22,854) (5,792) Other comprehensive income (loss) before reclassifications (2,832) 23,868 (9,922) 11,114 Amounts reclassified from accumulated other comprehensive income (1) 156 514 — 670 Net current period other comprehensive income (loss) (2,676) 24,382 (9,922) 11,784 December 31, 2022 $ 12,132 $ 26,636 $ (32,776) $ 5,992 (1) See the following table for details about these reclassifications. Amounts in parentheses indicate debits.
Reclassification out of Accumulated Other Comprehensive Income	The following table presents the reclassifications out of accumulated other comprehensive income for the years ended December 31, 2022 and 2021. Details about Accumulated Other Amount Reclassified from Accumulated Other Comprehensive Income (1) Affected Line Item in the Years ended 2022 2021 Amortization of defined benefit and other postretirement plans: Prior service credit $ (210) $ (232) Other (expense) income (2) Actuarial losses 3 5 Other (expense) income (2) Release of actuarial losses — (3,737) Net loss from discontinued operations, net of tax (207) (3,964) Total before tax 51 56 Tax benefit $ (156) $ (3,908) Net of tax Gains and losses on cash flow hedges: Interest rate caps $ (683) $ (444) Interest expense 169 110 Tax benefit (514) (334) Net of tax Release of foreign currency translation — 14,014 Net loss from discontinued operations, net of tax Total reclassifications for the period $ (670) $ 9,772 Net of tax (1) Amounts in parentheses indicate debits to profit/loss. (2) These accumulated other comprehensive income (loss) components are components of net periodic pension and other postretirement cost (see Note 22 to these consolidated financial statements for additional details).

Other Operating Expense, Net (T

Other Operating Expense, Net (Tables)	12 Months Ended
	Dec. 31, 2022
Other Income and Expenses [Abstract]
Schedule of Other Operating Expense, net	A summary of other operating expense, net is as follows: Years ended 2022 2021 2020 Amortization expense $ 10,562 $ 10,321 $ 8,689 Transaction and other related costs 6,988 2,268 1,033 Restructuring, integration and business optimization costs (1) 11,566 3,866 1,994 Net loss on asset disposals 3,594 5,666 4,722 Other, net 2,201 2,152 1,404 $ 34,911 $ 24,273 $ 17,842 (1) During the year ended December 31, 2022, the Company’s results were impacted by costs associated with severance charges for certain executives and employees. The severance charges were not related to a specific restructuring plan of the Company, but rather were incurred primarily in connection with the leadership transition in April 2022 and the retirement of several executives.

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2022
Inventory Disclosure [Abstract]
Schedule of Inventory, Current	Inventories, net are classified and valued as follows: December 31, 2022 2021 Finished products and work in process $ 39,909 $ 46,894 Raw materials 4,453 6,919 $ 44,362 $ 53,813 Valued at lower of cost or market: LIFO basis $ 25,258 $ 33,330 Valued at lower of cost and net realizable value: FIFO or average cost basis 19,104 20,483 $ 44,362 $ 53,813

Investments in Affiliated Com_2

Investments in Affiliated Companies (Tables)	12 Months Ended
	Dec. 31, 2022
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	Affiliated companies accounted for on the equity basis as of December 31, 2022 are as follows: Company Country Percent Zeolyst International USA 50% Zeolyst C.V. Netherlands 50% Following is summarized information of the combined investments (1) : December 31, 2022 2021 Current assets $ 278,330 $ 245,859 Noncurrent assets 196,775 223,982 Current liabilities 47,407 43,337 Noncurrent liabilities 16,000 7,471 Years ended 2022 2021 2020 Sales $ 306,511 $ 296,416 $ 275,621 Gross profit 105,693 101,069 88,616 Operating income 67,169 66,978 53,500 Net income 68,255 68,433 55,328 (1) Summarized information of the combined investments is presented at 100%; the Company’s share of the net assets and net income of affiliates is calculated based on the percent ownership specified in the table above. The following table summarizes the activity related to the Company’s investments in affiliated companies balance on the consolidated balance sheets: Years ended 2022 2021 Balance at beginning of period $ 446,074 $ 458,128 Equity in net income of affiliated companies 34,128 34,216 Charges related to purchase accounting fair value adjustments (6,402) (6,480) Dividends received (35,000) (35,000) Foreign currency translation adjustments (2,787) (4,790) Balance at end of period $ 436,013 $ 446,074

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	A summary of property, plant and equipment, at cost, and related accumulated depreciation is as follows: December 31, 2022 2021 Land $ 96,659 $ 97,047 Buildings and improvements 82,061 77,851 Machinery and equipment 751,145 714,435 Construction in progress 56,448 45,952 986,313 935,285 Less: accumulated depreciation (401,424) (339,054) $ 584,889 $ 596,231

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2022
Leases [Abstract]
Schedule of Right-of-Use Lease Assets and Lease Liabilities	The table below presents the operating leases, finance leases, and financing obligation right-of-use assets and liabilities recognized on the consolidated balance sheet as of December 31, 2022 and 2021: Classification December 31, December 31, Assets Operating lease assets Right-of-use lease assets $ 28,265 $ 30,115 Finance lease and financing obligation assets Property, plant and equipment, net 21,506 29,737 Total leased assets $ 49,771 $ 59,852 Liabilities Current: Operating lease liabilities Operating lease liabilities—current $ 8,155 $ 8,306 Finance lease and financing obligation liabilities Accrued liabilities 2,855 3,181 Noncurrent: Operating lease liabilities Operating lease liabilities—noncurrent 20,021 21,719 Finance lease and financing obligation liabilities Other long-term liabilities 7,633 11,667 Total leased liabilities $ 38,664 $ 44,873
Weighted Average Remaining Lease Term and Discount Rate	The Company’s weighted average remaining lease term and weighted average discount rate for operating and financing leases as of December 31, 2022 are as follows: December 31, December 31, Weighted average remaining lease term (in years): Operating leases 4.45 4.79 Finance leases and financing obligation 3.57 4.69 Weighted average discount rate: Operating leases 5.24 % 5.02 % Finance leases and financing obligation 2.86 % 2.86 %
Maturities of Lease Liabilities	Maturities of lease liabilities as of December 31, 2022 are as follows: Year Operating Finance 2023 $ 9,339 $ 3,063 2024 7,748 3,063 2025 5,797 3,036 2026 4,166 1,878 2027 2,770 — Thereafter 1,979 — Total lease payments 31,799 11,040 Less: Interest (3,623) (552) Total lease liabilities (1) $ 28,176 $ 10,488 (1) Refer to the above table regarding the Company’s right-of-use lease assets and lease liabilities for the presentation of the lease liabilities in the Company’s consolidated balance sheet as of December 31, 2022.
Cash Flow Information Related to Leases	The following table presents other information related to the Company’s operating leases, finance leases and financing obligation and the impact on the Company’s consolidated statement of cash flows: Years ended 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Payments on operating leases included in operating cash flows $ 10,327 $ 9,755 Interest payments under finance leases and financing obligation included in operating cash flows 339 189 Principal payments under finance leases and financing obligation included in financing cash flows 2,724 1,466 Right-of-use assets obtained in exchange for new lease liabilities (non-cash): Operating leases 7,462 9,526

Reportable Segments (Tables)

Reportable Segments (Tables)	12 Months Ended
	Dec. 31, 2022
Segment Reporting [Abstract]
Reconciliation of Revenue from Reportable Segments to Consolidated	Summarized financial information for the Company’s reportable segments is shown in the following table: Years ended 2022 2021 2020 Sales: Ecoservices $ 702,472 $ 500,513 $ 401,913 Catalyst Technologies (1) 117,687 110,688 94,007 Total $ 820,159 $ 611,201 $ 495,920 Adjusted EBITDA: (2) Ecoservices $ 227,760 $ 177,672 $ 157,198 Catalyst Technologies (3) 77,978 88,028 74,504 Adjusted EBITDA from reportable segments $ 305,738 $ 265,700 $ 231,702 (1) Excludes the Company’s proportionate share of sales from the Zeolyst Joint Venture accounted for using the equity method. The proportionate share of sales is $132,588, $131,332 and $128,623 for the years ended December 31, 2022, 2021 and 2020, respectively. (2) The Company defines Adjusted EBITDA as EBITDA adjusted for certain items as noted in the reconciliation below. Management evaluates the performance of its segments and allocates resources based on several factors, of which the primary measure is Adjusted EBITDA. Adjusted EBITDA should not be considered as an alternative to net income as an indicator of the Company’s operating performance. Adjusted EBITDA as defined by the Company may not be comparable with EBITDA or Adjusted EBITDA as defined by other companies. (3) The Adjusted EBITDA from the Zeolyst Joint Venture included in the Catalyst Technologies segment is $50,331 for the year ended December 31, 2022, which includes $27,931 of equity in net income plus $6,403 of amortization of investment in affiliate step-up plus $15,997 of joint venture depreciation, amortization and interest. The Adjusted EBITDA from the Zeolyst Joint Venture included in the Catalyst Technologies segment is $49,872 for the year ended December 31, 2021, which includes $27,827 of equity in net income plus $6,480 of amortization of investment in affiliate step-up plus $15,565 of joint venture depreciation, amortization and interest. The Adjusted EBITDA from the Zeolyst Joint Venture included in the Catalyst Technologies segment is $42,515 for the year ended December 31, 2020, which includes $21,157 of equity in net income plus $6,634 of amortization of investment in affiliate step-up plus $14,724 of joint venture depreciation, amortization and interest.
Reconciliation of Net Income to Segment Adjusted EBITDA	A reconciliation of income from continuing operations before income taxes to Adjusted EBITDA from reportable segments is as follows: Years ended 2022 2021 2020 Reconciliation of income from continuing operations before income taxes to Adjusted EBITDA from reportable segments Income from continuing operations before income taxes $ 94,735 $ 13,941 $ 2,215 Interest expense, net 37,217 36,990 50,409 Depreciation and amortization 79,163 79,741 76,926 Unallocated corporate expenses 29,042 38,089 39,087 Joint venture depreciation, amortization and interest 15,997 15,565 14,724 Amortization of investment in affiliate step-up 6,402 6,480 6,634 Debt extinguishment costs — 26,902 25,028 Net loss on asset disposals 3,594 5,666 4,722 Foreign currency exchange loss (gain) 1,388 4,716 (5,264) LIFO benefit (165) (1,931) (5,262) Transaction and other related costs 6,988 2,009 1,118 Equity-based compensation 20,632 31,838 17,194 Restructuring, integration and business optimization expenses 11,566 3,866 1,994 Other (821) 1,828 2,177 Adjusted EBITDA from reportable segments $ 305,738 $ 265,700 $ 231,702
Capital Expenditures from Segment to Consolidated	Capital expenditures for the Company’s reportable segments are shown in the following table: Years ended 2022 2021 2020 Capital expenditures: Ecoservices $ 47,770 $ 43,561 $ 31,799 Catalyst Technologies (1) 8,194 15,997 11,177 Corporate (2) 2,906 487 11,861 Capital expenditures per the consolidated statements of cash flows $ 58,870 $ 60,045 $ 54,837 (1) Excludes the Company’s proportionate share of capital expenditures from the Zeolyst Joint Venture. (2) Includes corporate capital expenditures, the cash impact from changes in capital expenditures in accounts payable and capitalized interest.
Revenue from External Customers by Geographic Areas	Sales by geographic area are presented in the following table. Sales are attributed to countries based upon location of products shipped. Years ended 2022 2021 2020 Sales (1) : United States $ 774,119 $ 571,587 $ 443,682 Other foreign countries 46,040 39,614 52,238 Total $ 820,159 $ 611,201 $ 495,920 (1) Except for the United States, no sales in an individual country exceeded 10% of the Company’s total sales. The Company sold products through its Ecoservices and Catalyst Technologies segments to customer A, which accounted for 12.3%, 12.6% and 10.4% of the Company’s total sales as of December 31, 2022, 2021, and 2020 respectively.
Long-lived Assets by Geographic Areas	Long-lived assets by geographic area is presented in the following table. Long-lived assets includes property, plant and equipment, net and right-of-use lease assets. December 31, 2022 2021 Long-lived assets: United States $ 587,726 $ 597,506 Other foreign countries 25,428 28,840 Total $ 613,154 $ 626,346

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The changes in the carrying amount of goodwill for the years ended December 31, 2022 and 2021 is summarized as follows: Ecoservices Catalyst Technologies Total Balance as of December 31, 2020 $ 311,892 $ 79,673 $ 391,565 Goodwill recognized (Note 6) 14,778 — 14,778 Foreign exchange impact — (204) (204) Balance as of December 31, 2021 326,670 79,469 406,139 Goodwill adjustments (1) (81) — (81) Foreign exchange impact — (2,895) (2,895) Balance as of December 31, 2022 $ 326,589 $ 76,574 $ 403,163 (1) During the year ended December 31, 2022, the Company recorded an adjustment of $81 between goodwill and deferred tax liabilities related to the final tax purchase price allocation for the Chem32 acquisition.
Schedule of Finite-Lived Intangible Assets	Gross carrying amounts and accumulated amortization for intangible assets other than goodwill are as follows: December 31, 2022 December 31, 2021 Gross Accumulated Net Gross Accumulated Net Technical know-how $ 54,880 $ (23,822) $ 31,058 $ 55,922 $ (20,648) $ 35,274 Customer relationships 130,636 (66,669) 63,967 131,248 (57,262) 73,986 Non-compete agreements 700 (257) 443 700 (117) 583 Trademarks 7,387 (3,283) 4,104 7,682 (2,902) 4,780 Trade names 1,600 (293) 1,307 1,600 (133) 1,467 Total definite-lived intangible assets 195,203 (94,324) 100,879 197,152 (81,062) 116,090 Indefinite-lived trade names 25,153 — 25,153 25,627 — 25,627 In-process research and development 3,900 — 3,900 3,900 — 3,900 Total intangible assets $ 224,256 $ (94,324) $ 129,932 $ 226,679 $ (81,062) $ 145,617
Schedule of Indefinite-Lived Intangible Assets	Gross carrying amounts and accumulated amortization for intangible assets other than goodwill are as follows: December 31, 2022 December 31, 2021 Gross Accumulated Net Gross Accumulated Net Technical know-how $ 54,880 $ (23,822) $ 31,058 $ 55,922 $ (20,648) $ 35,274 Customer relationships 130,636 (66,669) 63,967 131,248 (57,262) 73,986 Non-compete agreements 700 (257) 443 700 (117) 583 Trademarks 7,387 (3,283) 4,104 7,682 (2,902) 4,780 Trade names 1,600 (293) 1,307 1,600 (133) 1,467 Total definite-lived intangible assets 195,203 (94,324) 100,879 197,152 (81,062) 116,090 Indefinite-lived trade names 25,153 — 25,153 25,627 — 25,627 In-process research and development 3,900 — 3,900 3,900 — 3,900 Total intangible assets $ 224,256 $ (94,324) $ 129,932 $ 226,679 $ (81,062) $ 145,617
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	Estimated future aggregate amortization expense of intangible assets is as follows: Year Amount 2023 $ 14,023 2024 14,023 2025 14,023 2026 12,881 2027 12,346 Thereafter 33,583 Total estimated future aggregate amortization expense $ 100,879

Accrued Liabilities Accrued Lia

Accrued Liabilities Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2022
Payables and Accruals [Abstract]
Schedule of Accrued Liabilities	The following table summarizes the components of accrued liabilities as follows: December 31, 2022 2021 Compensation and bonus $ 30,890 $ 30,079 Interest 10,493 5,650 Property tax 2,123 2,144 Income taxes 4,412 9,864 Finance lease and financing obligation liabilities 2,855 3,181 Dividends payable 4,062 8,574 Accrued closing adjustments for Performance Chemicals divestiture (Note 5) — 3,745 Other 17,394 12,678 $ 72,229 $ 75,915

Long-term Debt (Tables)

Long-term Debt (Tables)	12 Months Ended
	Dec. 31, 2022
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	The summary of long-term debt is as follows: December 31, 2022 2021 Senior Secured Term Loan Facility due June 2028 (the "2021 Term Loan Facility") $ 886,500 $ 895,500 ABL Facility — — Total debt 886,500 895,500 Original issue discount (7,472) (8,762) Deferred financing costs (4,158) (4,899) Total debt, net of original issue discount and deferred financing costs 874,870 881,839 Less: current portion (9,000) (9,000) Total long-term debt, excluding current portion $ 865,870 $ 872,839
Fiscal Year Maturity Schedule	The aggregate long-term debt maturities are: Year Amount 2023 $ 9,000 2024 9,000 2025 9,000 2026 9,000 2027 9,000 Thereafter 841,500 $ 886,500

Other Long-term Liabilities Oth

Other Long-term Liabilities Other Long-term Liabilities (Tables)	12 Months Ended
	Dec. 31, 2022
Other Liabilities Disclosure [Abstract]
Schedule of Other Long-term Liabilities	The following table summarizes the components of other long-term liabilities as follows: December 31, 2022 2021 Pension plan liabilities $ 6,250 $ 3,551 Other postretirement benefit plan liabilities 428 607 Derivative liabilities 2,071 — Finance lease and financing obligation liabilities 7,633 11,667 Reserve for uncertain tax positions 8,215 7,658 Other 1,249 611 $ 25,846 $ 24,094

Financial Instruments (Tables)

Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Value of Derivatives Held	The fair values of derivative instruments held as of December 31, 2022 and 2021 are shown below: December 31, Balance sheet location 2022 2021 Derivative assets: Derivatives designated as cash flow hedges: Interest rate caps Prepaid and other current assets $ 18,510 $ — Interest rate caps Other long-term assets 15,864 1,080 Total derivative assets $ 34,374 $ 1,080 Derivative liabilities: Derivatives designated as cash flow hedges: Interest rate caps Accrued liabilities $ — $ 1,288 Interest rate caps Other long-term liabilities 2,071 — Total derivative liabilities $ 2,071 $ 1,288
Effect of Derivative Instruments Designated as Hedges on Accumulated Other Comprehensive Income	The following table shows the effect of the Company’s derivative instruments designated as hedges on accumulated other comprehensive income (loss) (“AOCI”) and the statements of income for the years ended December 31, 2022, 2021 and 2020: Years ended December 31, 2022 2021 2020 Location of gain (loss) reclassified from AOCI into income Amount of gain (loss) recognized in OCI on derivatives Amount of gain (loss) reclassified from AOCI into income Amount of gain (loss) recognized in OCI on derivatives Amount of gain (loss) reclassified from AOCI into income Amount of gain (loss) recognized in OCI on derivatives Amount of gain (loss) reclassified from AOCI into income Interest rate caps Interest (expense) income $ 32,510 $ (683) $ 3,441 $ (444) $ 167 $ (54)
Schedule of Effect of Cash Flow Hedging Instruments on the Statements of Income	The following table shows the effect of the Company’s cash flow hedge accounting on the consolidated statements of income for the years ended December 31, 2022, 2021 and 2020: Location and amount of gain (loss) recognized in income on cash flow hedging relationships Years ended December 31, 2022 2021 2020 Cost of goods sold Interest (expense) income Cost of goods sold Interest (expense) income Cost of goods sold Interest (expense) income Total amounts of income and expense line items presented in the statement of income in which the effects of cash flow hedges are recorded $ (595,529) $ (37,217) $ (434,540) $ (36,990) $ (344,967) $ (50,409) The effects of cash flow hedging: Gain (loss) on cash flow hedging relationships: Interest contracts: Amount of gain (loss) reclassified from AOCI into income — (683) — (444) — (54)
Schedule of Net Investment Hedges in Accumulated Other Comprehensive Income	The following table shows the effect of the Company’s net investment hedges on AOCI and the consolidated statements of income for the years ended December 31, 2021 and 2020, respectively: Amount of pre-tax gain (loss) recognized in OCI on derivative Location of gain (loss) reclassified from AOCI into income Amount of gain (loss) reclassified from AOCI into income Location of gain (loss) recognized in income on derivative (amount excluded from effectiveness testing) Amount of gain (loss) recognized in income on derivative (amount excluded from effectiveness testing) Years ended Years ended Years ended 2021 2020 2021 2020 2021 2020 Cross currency swaps $ 9,787 $ (23,622) Net (loss) income from discontinued operations, net of tax (1) $ 9,754 $ 1,967 Interest (expense) income $ 545 $ 5,090

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Schedule of Income (Loss) before Income Tax, Domestic and Foreign	Income (loss) before income taxes and noncontrolling interest within or outside the United States are shown below: Years ended 2022 2021 2020 Domestic $ 86,695 $ 6,185 $ (10,454) Foreign 8,040 7,756 12,669 Total $ 94,735 $ 13,941 $ 2,215
Schedule of Components of Income Tax Expense (Benefit)	The provision (benefit) for income taxes as shown in the accompanying consolidated statements of income consists of the following: Years ended 2022 2021 2020 Current: Federal $ 18,210 $ 2,469 $ — State 3,100 1,813 1,982 Foreign 1,978 3,317 6,013 23,288 7,599 7,995 Deferred: Federal 4,544 (1,813) (58,125) State (2,288) 2,551 (2,596) Foreign (604) 3,810 661 1,652 4,548 (60,060) Provision (benefit) for income taxes $ 24,940 $ 12,147 $ (52,065)
Schedule of Effective Income Tax Rate Reconciliation	A reconciliation of income tax expense (benefit) at the U.S. federal statutory income tax rate to actual income tax expense is as follows: Years ended 2022 2021 2020 Tax at statutory rate $ 19,894 $ 2,928 $ 314 State income taxes, net of federal income tax benefit 248 3,942 (401) Changes in uncertain tax positions 558 877 164 Rate changes — 5,209 4,274 Stock compensation 1,876 197 318 Compensation Disallowance under 162(m) 3,146 466 206 Foreign tax credits — (759) (56,359) Research and development tax credits (366) (620) (717) Other, net (416) (93) 136 Provision (benefit) for income taxes $ 24,940 $ 12,147 $ (52,065)
Schedule of Deferred Tax Assets and Liabilities	Deferred tax assets (liabilities) are comprised of the following: December 31, 2022 2021 Deferred tax assets: Net operating loss carryforwards $ 13,705 $ 24,107 Interest disallowance carryforward 228 24 Pension 879 227 Operating lease liability 6,873 7,362 Other 10,653 14,732 State credits 13,773 13,110 Foreign withholding tax credits 9,083 9,083 Valuation allowance (30,615) (39,857) $ 24,579 $ 28,788 Deferred tax liabilities: Depreciation $ (70,400) $ (71,815) Inventory (3,039) (2,899) Intangibles (63,873) (62,557) Operating lease right-of-use assets (6,763) (7,384) Other (15,910) (10,713) $ (159,985) $ (155,368) Net deferred tax liabilities $ (135,406) $ (126,580)
Open Tax Years	The following describes the open tax years, by significant tax jurisdiction, as of December 31, 2022: Jurisdiction Period United States-Federal 2011-2022 United States-State 2011-2022
Schedule of Tax Payments	Cash payments for income taxes, net of refunds, are as follows: Years ended 2022 2021 2020 Domestic $ 13,277 $ 549 $ 1,894 Foreign 359 69 29 $ 13,636 $ 618 $ 1,923

Benefit Plans (Tables)

Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2022
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure
Schedule of Benefit Plans Disclosures	The following tables summarize changes in the benefit obligation, plan assets and funded status of the Company’s defined benefit pension plans as well as the components of net periodic benefit cost, including key assumptions: U.S. Foreign December 31, December 31, 2022 2021 2021 Change in benefit obligation: Benefit obligation at beginning of period $ 86,465 $ 91,937 $ 22,210 Interest cost 2,569 2,210 255 Plan settlements (862) (1,795) (21,622) Benefits paid (2,552) (2,069) — Actuarial gains (18,741) (3,818) — Translation adjustment — — (843) Benefit obligation at end of the period $ 66,879 $ 86,465 $ — Change in plan assets: Fair value of plan assets at beginning of period $ 82,914 $ 80,395 $ 22,210 Actual return on plan assets (18,871) 6,383 255 Plan settlements (862) (1,795) (21,622) Benefits paid (2,552) (2,069) — Translation adjustment — — (843) Fair value of plan assets at end of the period $ 60,629 $ 82,914 $ — Funded status of the plans (underfunded) $ (6,250) $ (3,551) $ —
Schedule of Amounts Recognized in Balance Sheet	Amounts recognized in the consolidated balance sheets consist of: December 31, 2022 2021 Noncurrent liability $ (6,250) $ (3,551) Accumulated other comprehensive income (loss) (509) (672) Net amount recognized $ (6,759) $ (4,223)
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)	Amounts recognized in accumulated other comprehensive income (loss) consist of: December 31, 2022 2021 Net (loss) gain $ (1,039) $ 2,486 Gross amount recognized (1,039) 2,486 Deferred income taxes 530 (3,158) Net amount recognized $ (509) $ (672)
Components of Net Periodic Expense	Components of net periodic benefit cost consist of: U.S. Foreign Years ended Years ended 2022 2021 2020 2021 2020 Service cost $ — $ — $ 769 $ — $ 1,080 Interest cost 2,569 2,210 2,665 255 299 Expected return on plan assets (3,433) (4,360) (3,898) (255) (287) Amortization of net loss — — — — 95 Settlement loss (gain) recognized 38 (26) 78 2,084 — Net periodic (benefit) expense $ (826) $ (2,176) $ (386) $ 2,084 $ 1,187
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss)	Components of other changes in plan assets and benefit obligations recognized in other comprehensive income consists of: December 31, 2022 2021 Net loss (gain) $ 3,563 $ (5,841) Translation adjustment — (82) Amortization or settlement recognition of net gain (loss) (38) (2,058) Total recognized in other comprehensive income 3,525 (7,981) Total recognized in net periodic benefit cost and other comprehensive income $ 2,699 $ (7,991)
Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets	The following table presents selected information about the Company’s pension plans with projected benefit obligations and accumulated benefit obligations in excess of plan assets: December 31, 2022 2021 Projected benefit obligation $ 66,879 $ 86,465 Accumulated benefit obligation 66,879 86,465 Fair value of plan assets 60,629 82,914
Schedule of Assumptions Used	Significant weighted average assumptions used in determining the pension obligations include the following: December 31, 2022 2021 Discount rate 5.40 % 2.90 % Rate of compensation increase (1) N/A N/A Significant weighted average assumptions used in determining net periodic benefit cost include the following: U.S. Foreign Years ended Years ended 2022 2021 2020 2021 2020 Discount rate 2.90 % 2.50 % 3.40 % 1.20 % 1.50 % Rate of compensation increase (1) N/A N/A 3.00 % 1.75 % 1.75 % Expected return on assets 4.90 % 5.60 % 5.70 % 1.20 % 1.50 % (1) Includes only plans not frozen to benefit accruals for the respective periods.
Schedule of Allocation of Plan Assets	The following tables set forth by level, within the fair value hierarchy, plan assets at fair value: December 31, 2022 Total Level 1 Level 2 Level 3 Cash and cash equivalents $ 244 $ 244 $ — $ — Equity securities: U.S. investment funds 11,435 11,435 — — International investment funds 7,803 7,803 — — Fixed income securities: Government securities 16,209 16,209 — — Corporate bonds 24,938 24,938 — — Total $ 60,629 $ 60,629 $ — $ — December 31, 2021 Total Level 1 Level 2 Level 3 Cash and cash equivalents $ 202 $ 202 $ — $ — Equity securities: U.S. investment funds 12,150 12,150 — — International investment funds 7,816 7,816 — — Fixed income securities: Government securities 28,869 28,869 — — Corporate bonds 33,877 33,877 — — Total $ 82,914 $ 82,914 $ — $ —
Schedule of Expected Benefit Payments	The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid: Year Amount 2023 $ 4,751 2024 4,518 2025 4,336 2026 4,419 2027 4,473 Years 2028-2032 22,937
Other Postretirement Benefits Plans
Defined Benefit Plan Disclosure
Schedule of Benefit Plans Disclosures	The following tables summarize changes in the benefit obligation, plan assets and funded status of the Company’s other postretirement benefit plan as well as the components of net periodic benefit cost, including key assumptions: December 31, 2022 2021 Change in benefit obligation: Benefit obligation at beginning of period $ 624 $ 650 Interest cost 18 17 Benefits paid (1) (1) Premiums paid (3) (2) Actuarial gains (192) (40) Benefit obligation at end of period $ 446 $ 624 Change in plan assets: Employer contributions $ 4 $ 3 Benefits paid (1) (1) Premiums paid (3) (2) Fair value of plan assets at end of period $ — $ — Funded status of the plan (underfunded) $ (446) $ (624)
Schedule of Amounts Recognized in Balance Sheet	Amounts recognized in the consolidated balance sheets consist of: December 31, 2022 2021 Current liability $ (18) $ (17) Noncurrent liability (428) (607) Accumulated other comprehensive income (299) (59) Net amount recognized $ (745) $ (683)
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)	Amounts recognized in accumulated other comprehensive income consist of: December 31, 2022 2021 Prior service credit $ 154 $ 364 Net gain (loss) 80 (114) Gross amount recognized 234 250 Deferred income taxes (533) (309) Net amount recognized $ (299) $ (59)
Components of Net Periodic Expense	Components of net periodic benefit cost consist of: Years ended 2022 2021 2020 Interest cost $ 18 $ 17 $ 19 Amortization of prior service credit (210) (232) (232) Amortization of net loss 3 5 1 Net periodic benefit $ (189) $ (210) $ (212)
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss)	Components of other changes in plan assets and benefit obligations recognized in other comprehensive income consists of: December 31, 2022 2021 Net gain $ (192) $ (40) Amortization of prior service credit 210 232 Amortization or settlement recognition of net loss (3) (5) Total recognized in other comprehensive income $ 15 $ 187 Total recognized in net periodic benefit cost and other comprehensive income $ (174) $ (23)
Schedule of Expected Benefit Payments	The following benefit payments, which reflect expected future service, as appropriate, are expected to be paid: Year Amount 2023 $ 18 2024 19 2025 20 2026 21 2027 22 Years 2028-2032 138

Stock-Based Compensation - (Tab

Stock-Based Compensation - (Tables)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Stock-Based Compensation [Abstract]
Share-based Compensation Options Activity	The following table summarizes the activity of common stock options for the period from December 31, 2019 through the year ended December 31, 2022: Number of Options Weighted Average Exercise Price Weighted Average Remaining Contractual Term (in years) Aggregate Intrinsic Value Outstanding at December 31, 2019 2,374,357 $ 11.44 Exercised (43,250) $ 8.64 Forfeited (157,776) $ 9.23 Outstanding at December 31, 2020 2,173,331 $ 9.84 (1) Exercised (208,500) $ 3.56 Forfeited (39,996) $ 3.53 Expired (40,484) $ 14.52 Outstanding at December 31, 2021 1,884,351 $ 6.99 (2) Exercised (199,970) $ 3.06 Forfeited (51,860) $ 3.98 Expired (111,524) $ 11.97 Outstanding at December 31, 2022 1,520,997 $ 7.24 3.36 $ 4,720 Exercisable at December 31, 2022 1,236,041 $ 8.13 3.30 $ 3,171 (1) Reflects the impact of the reduction in the strike price on all outstanding vested and unvested stock options by $1.80 per share as described above. (2) Reflects the impact of the reduction in the strike price on all outstanding vested and unvested stock options by $3.20 per share as described above.
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The Company used a Monte Carlo simulation to estimate the $8.82 weighted average fair value of the awards, with the following weighted average assumptions: Expected dividend yield — % Risk-free interest rate 1.51 % Expected volatility 44.51 % Expected term (in years) 2.91	The Company used a Monte Carlo simulation to estimate the $13.21 weighted average fair value of the awards, with the following weighted average assumptions: Expected dividend yield — % Risk-free interest rate 0.20 % Expected volatility 41.70 % Expected term (in years) 2.95	The Company used a Monte Carlo simulation to estimate the $24.11 weighted average fair value of the portion of the awards subject to the TSR goal, with the following weighted average assumptions: Expected dividend yield — % Risk-free interest rate 1.56 % Expected volatility 28.57 % Expected term (in years) 2.95
Schedule of Nonvested Restricted Stock Awards, Restricted Stock Units and Performance Stock Unit Activity	The following table summarizes the activity of restricted stock awards, restricted stock units and performance stock units for the period from December 31, 2019 through the year ended December 31, 2022: Restricted Stock Awards Restricted Stock Units Performance Stock Units Number of Weighted Average Grant Date Fair Value (per share) Number of Weighted Average Grant Date Fair Value (per share) Number of Weighted Average Grant Date Fair Value (per share) Nonvested as of December 31, 2019 1,546,130 $ 8.17 1,628,436 $ 15.83 550,676 (2) $ 15.41 Granted — $ — 1,158,605 $ 16.60 456,311 $ 20.29 Vested (29,760) $ 12.32 (816,866) $ 16.17 — $ — Forfeited (619,355) $ 8.04 (129,036) $ 16.28 (41,251) $ 15.95 Nonvested as of December 31, 2020 897,015 $ 13.80 (1) 1,841,139 $ 16.14 965,736 (2) $ 17.69 Granted — $ — 1,697,623 $ 15.39 211,985 $ 13.21 Vested — $ — (773,619) $ 16.00 — $ — Forfeited (263,291) $ 15.31 (1) (257,722) $ 16.03 (60,166) $ 17.11 Nonvested as of December 31, 2021 633,724 $ 15.84 (1) 2,507,421 $ 15.68 1,117,555 (2) $ 16.91 Granted — $ — 2,779,690 $ 10.28 295,132 $ 8.82 Vested (84,903) $ 8.83 (1,550,969) $ 15.08 (496,442) $ 15.41 Forfeited (271,765) $ 15.84 (1,271,424) $ 12.27 (276,713) $ 12.33 Nonvested as of December 31, 2022 277,056 $ 15.66 2,464,718 $ 11.73 639,532 (2) $ 16.32 (1) Reflects the impact of the modification on all unvested restricted stock awards as described above. (2) Based on target.

Earnings per Share (Tables)

Earnings per Share (Tables)	12 Months Ended
	Dec. 31, 2022
Earnings Per Share [Abstract]
Schedule of from Basic to Diluted Weighted Average Number of Shares Outstanding	The reconciliation from basic to diluted weighted average shares outstanding is as follows: Years ended 2022 2021 2020 Weighted average shares outstanding – Basic 133,601,322 136,167,384 135,528,977 Dilutive effect of unvested common shares and restricted stock units with service conditions, performance stock units considered probable of vesting and assumed stock option exercises and conversions 1,486,850 1,541,547 921,976 Weighted average shares outstanding – Diluted 135,088,172 137,708,931 136,450,953
Schedule of Earnings Per Share, Basic and Diluted	Basic and diluted income (loss) per share are calculated as follows: Years ended 2022 2021 2020 Numerator: Income from continuing operations attributable to Ecovyst Inc. $ 69,795 $ 1,794 $ 54,280 Income (loss) from discontinued operations attributable to Ecovyst Inc. 3,902 (141,743) (333,051) Net income (loss) attributable to Ecovyst Inc. $ 73,697 $ (139,949) $ (278,771) Denominator: Weighted average shares outstanding – Basic 133,601,322 136,167,384 135,528,977 Weighted average shares outstanding – Diluted 135,088,172 137,708,931 136,450,953 Net income (loss) per share: Basic income per share - continuing operations $ 0.52 $ 0.01 $ 0.40 Diluted income per share - continuing operations $ 0.52 $ 0.01 $ 0.40 Basic (loss) income per share - discontinued operations $ 0.03 $ (1.04) $ (2.46) Diluted (loss) income per share - discontinued operations $ 0.03 $ (1.03) $ (2.44) Basic income (loss) per share $ 0.55 $ (1.03) $ (2.06) Diluted income (loss) per share $ 0.55 $ (1.02) $ (2.04)
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	The table below presents the details of the Company’s weighted average equity-based awards outstanding during each respective year that were excluded from the calculation of diluted earnings per share: Years ended 2022 2021 2020 Restricted stock awards with performance only targets not yet achieved 539,688 839,432 1,225,855 Stock options with performance only targets not yet achieved 309,984 373,105 507,461 Anti-dilutive restricted stock awards, restricted stock units and performance stock units 20,497 6,214 1,453,120 Anti-dilutive stock options 776,594 244,473 846,049

Quarterly Financial Summary (_2

Quarterly Financial Summary (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2022
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	The following tables summarize the Company’s quarterly financial results during the years ended December 31, 2022 and 2021: 2022 First Second Third Fourth Sales $ 179,714 $ 225,172 $ 232,533 $ 182,740 Gross profit 47,735 59,859 67,669 49,367 Operating income 16,436 27,411 38,536 22,002 Net income from continuing operations 7,875 19,245 21,325 21,350 Net income from discontinued operations, net of tax — — — 3,902 Net income 7,875 19,245 21,325 25,252 Net income attributable to Ecovyst Inc. 7,875 19,245 21,325 25,252 Earnings per common share - basic: Continued operations $ 0.06 $ 0.14 $ 0.16 $ 0.17 Discontinued operations $ — $ — $ — $ 0.03 Net earnings per share - basic $ 0.06 $ 0.14 $ 0.16 $ 0.20 Earnings per common share - diluted: Continued operations $ 0.06 $ 0.14 $ 0.16 $ 0.17 Discontinued operations $ — $ — $ — $ 0.03 Net earnings per share - diluted $ 0.06 $ 0.14 $ 0.16 $ 0.20 Weighted average shares outstanding: Basic 137,684,773 138,035,764 132,622,105 125,962,111 Diluted 138,749,065 139,149,560 134,096,839 127,538,343 2021 First Second Third Fourth Sales $ 126,624 $ 146,952 $ 167,428 $ 170,197 Gross profit 30,119 38,473 53,644 54,425 Operating income 2,482 11,652 22,494 17,979 Net (loss) income from continuing operations (2,748) (7,870) 4,689 7,723 Net (loss) income from discontinued operations, net of tax (89,770) 6,520 (75,872) 17,712 Net (loss) income (92,518) (1,350) (71,183) 25,435 Less: Net income attributable to the noncontrolling interest - discontinued operations 117 140 76 — Net (loss) income attributable to Ecoyvst Inc. (92,635) (1,490) (71,259) 25,435 (Loss) Earnings per common share - basic: Continuing operations $ (0.02) $ (0.06) $ 0.03 $ 0.06 Discontinued operations $ (0.66) $ 0.05 $ (0.56) $ 0.13 Net (loss) earnings per share - basic $ (0.68) $ (0.01) $ (0.52) $ 0.19 (Loss) Earnings per common share - diluted: Continuing operations $ (0.02) $ (0.06) $ 0.03 $ 0.06 Discontinued operations $ (0.66) $ 0.05 $ (0.55) $ 0.13 Net (loss) earnings per share - diluted $ (0.68) $ (0.01) $ (0.52) $ 0.18 Weighted average shares outstanding: Basic 136,006,082 136,095,060 136,129,591 136,256,601 Diluted 136,006,082 136,095,060 137,354,427 137,528,028

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2022
Supplemental Cash Flow Elements [Abstract]
Schedule of Cash Flow, Supplemental Disclosures	The following table presents supplemental cash flow information for the Company, which includes activity from both continuing and discontinued operations: Years ended 2022 2021 2020 Cash paid during the year for: Income taxes, net of refunds $ 25,556 $ 11,843 $ 35,013 Interest (1) 35,370 59,040 90,291 Non-cash investing activity (2) : Capital expenditures acquired on account but unpaid as of the year end 4,653 6,116 16,245 (1) Cash paid for interest is shown net of capitalized interest for the periods presented and excludes $2,307 and $4,963 of net interest proceeds on swaps designated as net investment hedges for the years ended December 31, 2021 and 2020, respectively, which are included within cash flows from investing activities, discontinued operations in the Company’s consolidated statements of cash flows. (2) For the supplemental non-cash information on lease liabilities arising from obtaining right-of-use lease assets, see Note 14 to these consolidated financial statements for additional details.
Schedule of Cash and Cash Equivalents	The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets as of December 31, 2022, 2021 and 2020 to the total of the same amounts shown in the consolidated statements of cash flows for the years then ended: December 31, 2022 2021 2020 Cash and cash equivalents $ 110,920 $ 140,889 $ 113,377 Restricted cash included in prepaid and other current assets — — 1,640 Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows $ 110,920 $ 140,889 $ 115,017
Restrictions on Cash and Cash Equivalents	The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets as of December 31, 2022, 2021 and 2020 to the total of the same amounts shown in the consolidated statements of cash flows for the years then ended: December 31, 2022 2021 2020 Cash and cash equivalents $ 110,920 $ 140,889 $ 113,377 Restricted cash included in prepaid and other current assets — — 1,640 Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows $ 110,920 $ 140,889 $ 115,017

Schedule I - Condensed Financ_2

Schedule I - Condensed Financial Information of Parent (Tables)	12 Months Ended
	Dec. 31, 2022
Condensed Financial Information Disclosure [Abstract]
Schedule of Condensed Statements of Income	Years ended 2022 2021 2020 Stock compensation expense $ 20,632 $ 39,523 $ 25,200 Equity in net (income) loss from subsidiaries (94,329) 100,426 253,571 Net income (loss) 73,697 (139,949) (278,771) Other comprehensive income (loss), net of tax: 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) (2,804) Total other comprehensive income 11,784 10,196 83 Comprehensive income (loss) $ 85,481 $ (129,753) $ (278,688)
Schedule of Condensed Balance Sheets	December 31, December 31, ASSETS Investment in subsidiaries $ 707,229 $ 740,737 Total assets $ 707,229 $ 740,737 LIABILITIES Total liabilities $ — $ — STOCKHOLDERS' EQUITY Common stock (0.01 par); authorized shares 450,000,000; issued shares 139,571,272 and 137,820,971 on December 31, 2022 and 2021, respectively; outstanding shares 122,186,238 and 136,938,758 on December 31, 2022 and 2021, respectively 1,396 1,378 Preferred stock (0.01 par); authorized shares 50,000,000; no shares issued or outstanding on December 31, 2022 and 2021, respectively — — Additional paid-in capital 1,091,475 1,073,409 Accumulated deficit (242,010) (315,707) Treasury stock, at cost; shares 17,385,034 and 882,213 on December 31, 2022 and 2021, respectively (149,624) (12,551) Accumulated other comprehensive (loss) income 5,992 (5,792) Total equity 707,229 740,737 Total liabilities and equity $ 707,229 $ 740,737
Schedule of Condensed Statements of Cash Flow	Years ended 2022 2021 2020 Cash flows from operating activities: Net income (loss) $ 73,697 $ (139,949) $ (278,771) Adjustments to reconcile net income to net cash provided by operating activities: Equity in net income from subsidiaries (94,329) 100,426 253,571 Stock compensation expense 20,632 39,523 25,200 Net cash provided by operating activities — — — Cash flows from investing activities: Distribution from subsidiaries — 435,593 243,749 Net cash provided by investing activities — 435,593 243,749 Cash flows from financing activities: Dividends paid to stockholders — (435,593) (243,749) Net cash used in financing activities — (435,593) (243,749) Effect of exchange rate changes on cash, cash equivalents and restricted cash — — — Net change in cash, cash equivalents and restricted cash — — — Cash, cash equivalents and restricted cash at beginning of period — — — Cash, cash equivalents and restricted cash at end of period of continuing operations $ — $ — $ —

Background and Basis of Prese_2

Background and Basis of Presentation (Details) $ in Thousands			12 Months Ended
	Aug. 01, 2021 USD ($)	Dec. 14, 2020 USD ($)	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Reportable segments			2
Performance Materials
Dispositions [Line Items]
Proceeds from divestiture of businesses		$ 650,000
Performance Chemicals
Dispositions [Line Items]
Proceeds from divestiture of businesses	$ 1,100,000

Summary of Significant Accoun_3

Summary of Significant Accounting Policies - Narratives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Summary of Significant Accounting Policies Table
Foreign currency exchange loss (gain)	$ 978	$ 4,716	$ (5,264)
Restricted cash included in prepaid and other current assets	0
Interest costs capitalized	1,442	1,235	1,788
Research and development cost	$ 7,232	7,499	7,137
OCI Attributable To Disposal Of Business
Summary of Significant Accounting Policies Table
Prior period reclassification adjustments		9,123	13,835
Non-controlling Interest Attributable to Disposal of Business
Summary of Significant Accounting Policies Table
Prior period reclassification adjustments		$ 723	$ 740
Maximum
Summary of Significant Accounting Policies Table
Remaining lease term	23 years
Building and building improvements | Minimum
Summary of Significant Accounting Policies Table
Fixed asset useful life	15 years
Building and building improvements | Maximum
Summary of Significant Accounting Policies Table
Fixed asset useful life	33 years
Machinery and equipment | Minimum
Summary of Significant Accounting Policies Table
Fixed asset useful life	3 years
Machinery and equipment | Maximum
Summary of Significant Accounting Policies Table
Fixed asset useful life	10 years

Performance Materials Divesti_3

Performance Materials Divestiture - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Dispositions [Line Items]
Dividends paid on common stock (in dollars per share)	$ 3.20	$ 1.80
Transition Services Agreement, Term		9 months
Performance Materials
Dispositions [Line Items]
Purchase price		$ 650,000
Dividends paid on common stock (in dollars per share)		$ 1.80
Transition Service Agreement Income	$ 3,314

Performance Materials Divesti_4

Performance Materials Divestiture - Reconciliation of Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Dispositions [Line Items]
Net proceeds received	$ 0	$ 978,449	$ 624,256
Loss on sale of Performance Materials		(150,230)	(70,878)
Provision for income taxes		37,255
Performance Materials
Dispositions [Line Items]
Net proceeds received			624,256
Transaction costs		$ (2,054)	(13,161)
Net assets derecognized			(681,973)
Loss on sale of Performance Materials			70,878
Provision for income taxes			$ 58,008

Performance Materials Divesti_5

Performance Materials Divestiture - Income Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Equity in net income from affiliated companies									$ 27,725	$ 27,737	$ 21,065
Loss on sale of Performance Materials										(150,230)	(70,878)
Provision for income taxes										37,255
Net income (loss) from discontinued operations, net of tax	$ 3,902	$ 0	$ 0	$ 0	$ 17,712	$ (75,872)	$ 6,520	$ (89,770)	3,902	(141,410)	(335,984)
Mandatory payments									9,000	1,430,863	1,091,134
Stock compensation expense									20,632	31,838	17,194
Change in Tax Return Recognized										5,429
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest					$ 0	$ 76	$ 140	$ 117	$ 0	333	(2,933)
Performance Materials
Income Statement [Abstract]
Sales											342,738
Cost of goods sold											251,917
Selling, general and administrative expenses											33,195
Other operating expense, net											18,289
Operating income											39,337
Equity in net income from affiliated companies											(37)
Interest expense, net											16,210
Other income, net											(3,481)
Loss on sale of Performance Materials											70,878
Loss from discontinued operations before income tax											(44,233)
Provision for income taxes											58,008
Net income (loss) from discontinued operations, net of tax											(102,241)
Mandatory payments											275,787
Transaction costs										(2,054)	(13,161)
Stock compensation expense										1,970
Income Tax Benefit on Transaction Costs and Stock-based Compensation Expense Only										$ 988
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest											265
2020 Term Loan Facility | Performance Materials
Income Statement [Abstract]
Mandatory payments											$ 188,722

Performance Chemicals Divesti_3

Performance Chemicals Divestiture - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Dispositions [Line Items]
Net proceeds received	$ 0	$ 978,449	$ 624,256
Dividends paid on common stock (in dollars per share)		$ 3.20	$ 1.80
Performance Chemicals
Dispositions [Line Items]
Price per definitive agreement		$ 1,100,000
Net proceeds received		$ 978,449

Performance Chemicals Divesti_4

Performance Chemicals Divestiture - Reconciliation of Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Dispositions [Line Items]
Estimate disposal loss		$ 109,584
Net proceeds received	$ 0	978,449	$ 624,256
Loss on sale of Performance Chemicals		(150,230)	(70,878)
Stock compensation expense	20,632	31,838	17,194
Provision for income taxes		37,255
Performance Chemicals
Dispositions [Line Items]
Net proceeds received		978,449
Transaction costs		35,402
Net assets derecognized		(1,093,277)
Loss on sale of Performance Chemicals		150,230	0
Stock compensation expense		5,691
Provision for income taxes	$ (6,311)	$ (24,886)	$ 3,943
Discontinued operations		The following is a reconciliation of the loss recorded on the sale: Net proceeds received from the sale of the Performance Chemicals business $ 978,449 Transaction costs (35,402) Net assets derecognized (1,093,277) Loss on sale of the Performance Chemicals business $ (150,230) The following table summarizes the results of discontinued operations related to Performance Chemicals for the periods presented: Years ended 2022 2021 2020 Sales $ — $ 389,870 $ 614,704 Cost of goods sold — 284,220 492,302 Selling, general and administrative expenses — 29,856 43,749 Goodwill impairment charge — 75,080 260,000 Other operating expense, net (1) 2,409 14,765 33,144 Loss on sale of the Performance Chemicals business — 150,230 — Operating loss (2,409) (164,281) (214,491) Equity in net income from affiliated companies — (111) (172) Interest expense, net (2) — 10,730 16,570 Other income, net — (6,210) (1,089) Loss from discontinued operations before income tax (2,409) (168,690) (229,800) (Benefit) Provision for income taxes (6,311) (24,886) 3,943 Loss from discontinued operations, net of tax $ 3,902 $ (143,804) $ (233,743) (1) The Company reclassified transaction costs that were previously recorded to this line item and included those charges in the line item Loss on sale of the Performance Chemicals business during the years ended December 31, 2021 and 2020 . (2) Upon the close of the transaction, the Company used a portion of the net proceeds to repay a portion of its outstanding debt amounting to $526,363. Refer to Note 18 for additional details on the repayment of outstanding debt. Prior to the Company’s debt refinancing in June 2021, the Company’s outstanding term loan facilities had required refinancing of debt with repayment provisions. As a result, interest expense has been allocated to discontinued operations on the basis of the Company’s total repayment of $526,363.

Performance Chemicals Divesti_5

Performance Chemicals Divestiture - Income Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Dispositions [Line Items]
Loss on sale of Performance Chemicals										$ (150,230)	$ (70,878)
Equity in net income from affiliated companies									$ 27,725	27,737	21,065
(Benefit) Provision for income taxes										37,255
Net income (loss) from discontinued operations, net of tax	$ 3,902	$ 0	$ 0	$ 0	$ 17,712	$ (75,872)	$ 6,520	$ (89,770)	3,902	(141,410)	(335,984)
Mandatory payments									9,000	1,430,863	1,091,134
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest					0	76	140	117	0	333	(2,933)
Net income (loss)	$ 25,252	$ 21,325	$ 19,245	$ 7,875	$ 25,435	$ (71,259)	$ (1,490)	$ (92,635)	73,697	(139,949)	(278,771)
Performance Chemicals
Dispositions [Line Items]
Cost of goods sold										284,220	492,302
Selling, general and administrative expenses										29,856	43,749
Goodwill impairment charge										75,080	260,000
Other operating expense, net									2,409	14,765	33,144
Loss on sale of Performance Chemicals										150,230	0
Operating loss									(2,409)	(164,281)	(214,491)
Equity in net income from affiliated companies										(111)	(172)
Interest expense, net										10,730	16,570
Other income, net										(6,210)	(1,089)
Loss from discontinued operations before income tax									(2,409)	(168,690)	(229,800)
(Benefit) Provision for income taxes									(6,311)	(24,886)	3,943
Net income (loss) from discontinued operations, net of tax									$ 3,902	(143,804)	(233,743)
Mandatory payments										526,363
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest										333	(3,198)
Net income (loss)										(144,137)	(230,545)
Performance Chemicals
Dispositions [Line Items]
Sales										$ 389,870	$ 614,704

Performance Chemicals Divesti_6

Performance Chemicals Divestiture - Financing Obligation (Details) £ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 GBP (£)
Dispositions [Line Items]
Financing Obligation Liability		$ 16,005		£ 11,648
Proceeds from financing obligation	$ 0	16,005	$ 0
Payments under financing arrangement	$ 7,872	$ 3,395

Acquisition Narrative (Details)

Acquisition Narrative (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
	Mar. 01, 2021	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition
Sales		$ 182,740	$ 232,533	$ 225,172	$ 179,714	$ 170,197	$ 167,428	$ 146,952	$ 126,624	$ 820,159	$ 611,201	$ 495,920
Net income (loss)		25,252	21,325	$ 19,245	$ 7,875	25,435	$ (71,259)	$ (1,490)	$ (92,635)	73,697	(139,949)	(278,771)
Gross contractual amount of accounts receivable acquired						1,368					1,368
Amortization										10,562	10,321	8,689
Uncollectable accounts receivable acquired						0					0
Cost of goods sold
Business Acquisition
Amortization										3,480	3,465	3,111
Other operating expenses
Business Acquisition
Amortization										10,562	10,321	$ 8,678
Chem32
Business Acquisition
Price of acquisition	$ 44,000
Holdback liability		$ 512	$ 488			$ 1,000				$ 512	1,000
Sales											14,419
Net income (loss)											4,755
Acquisition and Integration Costs											1,235
Chem32 | Cost of goods sold
Business Acquisition
Amortization											317
Chem32 | Other operating expenses
Business Acquisition
Amortization											$ 1,583

Purchase Price Allocation (Deta

Purchase Price Allocation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Recognized amounts of identifiable assets acquired and liabilities assumed:
Cash paid, net of cash acquired	$ 488	$ 42,639	$ 0
Goodwill	$ 403,163	406,139	$ 391,565
Chem32
Business Acquisition
Payments to Acquire Businesses, Gross		42,639
Recognized amounts of identifiable assets acquired and liabilities assumed:
Total consideration, net of cash acquired		43,639
Receivables		1,368
Inventories		204
Prepaid and other current assets		351
Property, plant and equipment		5,046
Other intangible assets		22,100
Other long-term assets		187
Fair value of assets acquired		29,256
Accounts payable		207
Accrued liabilities		188
Fair value of net assets acquired		28,861
Goodwill		14,778
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net		$ 43,639

Intangible Asset Acquisitions (

Intangible Asset Acquisitions (Details) - Chem32 $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Trade names
Business Acquisition
Finite-lived Intangible Assets Acquired	$ 1,600
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Customer relationships
Business Acquisition
Finite-lived Intangible Assets Acquired	$ 16,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Technical know-how
Business Acquisition
Finite-lived Intangible Assets Acquired	$ 3,800
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Non-compete agreements
Business Acquisition
Finite-lived Intangible Assets Acquired	$ 700
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years

Revenue from Contracts with C_3

Revenue from Contracts with Customers Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Abstract]
Contract asset	$ 0	$ 0
Contract liabilities	$ 0	$ 0

Revenue from Contracts with C_4

Revenue from Contracts with Customers Disaggregated Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Sales	$ 182,740	$ 232,533	$ 225,172	$ 179,714	$ 170,197	$ 167,428	$ 146,952	$ 126,624	$ 820,159	$ 611,201	$ 495,920
Ecoservices
Disaggregation of Revenue [Line Items]
Sales									702,472	500,513	401,913
Silica Catalyts
Disaggregation of Revenue [Line Items]
Sales									117,687	110,688	94,007
Operating segments
Disaggregation of Revenue [Line Items]
Sales									820,159	611,201	495,920
Operating segments | Clean fuels, emission control & other
Disaggregation of Revenue [Line Items]
Sales									28,966	25,673	11,955
Operating segments | Polymers & engineered plastics
Disaggregation of Revenue [Line Items]
Sales									117,687	110,688	94,007
Operating segments | Regeneration and treatment services
Disaggregation of Revenue [Line Items]
Sales									342,645	262,026	233,122
Operating segments | Industrial, mining & automotive
Disaggregation of Revenue [Line Items]
Sales									330,861	212,814	156,836
Operating segments | Ecoservices
Disaggregation of Revenue [Line Items]
Sales									702,472	500,513	401,913
Operating segments | Ecoservices | Clean fuels, emission control & other
Disaggregation of Revenue [Line Items]
Sales									28,966	25,673	11,955
Operating segments | Ecoservices | Polymers & engineered plastics
Disaggregation of Revenue [Line Items]
Sales									0	0	0
Operating segments | Ecoservices | Regeneration and treatment services
Disaggregation of Revenue [Line Items]
Sales									342,645	262,026	233,122
Operating segments | Ecoservices | Industrial, mining & automotive
Disaggregation of Revenue [Line Items]
Sales									330,861	212,814	156,836
Operating segments | Silica Catalyts
Disaggregation of Revenue [Line Items]
Sales									117,687	110,688	94,007
Operating segments | Silica Catalyts | Clean fuels, emission control & other
Disaggregation of Revenue [Line Items]
Sales									0	0	0
Operating segments | Silica Catalyts | Polymers & engineered plastics
Disaggregation of Revenue [Line Items]
Sales									117,687	110,688	94,007
Operating segments | Silica Catalyts | Regeneration and treatment services
Disaggregation of Revenue [Line Items]
Sales									0	0	0
Operating segments | Silica Catalyts | Industrial, mining & automotive
Disaggregation of Revenue [Line Items]
Sales									$ 0	$ 0	$ 0

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Recurring - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets
Derivative asset	$ 34,374	$ 1,080
Liabilities:
Derivative liability	2,071	1,288
Quoted Prices in Active Markets (Level 1)
Assets
Derivative asset	0	0
Liabilities:
Derivative liability	0	0
Significant Other Observable Inputs (Level 2)
Assets
Derivative asset	34,374	1,080
Liabilities:
Derivative liability	2,071	1,288
Significant Unobservable Inputs (Level 3)
Assets
Derivative asset	0	0
Liabilities:
Derivative liability	$ 0	$ 0

Stockholders' Equity - Componen

Stockholders' Equity - Components of AOCI (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax
Stockholders equity	$ 707,229	$ 740,737	$ 1,277,179	$ 1,785,318
Accumulated other comprehensive income (loss)
Accumulated Other Comprehensive Income (Loss), Net of Tax
Stockholders equity	5,992	(5,792)	$ (15,265)	$ (15,348)
Defined benefit and other postretirement plans
Tax
Tax related to AOCI	(4,078)	(4,957)
Accumulated Other Comprehensive Income (Loss), Net of Tax
Stockholders equity	12,132	14,808
Net gain (loss) from hedging activities
Tax
Tax related to AOCI	(9,057)	(759)
Accumulated Other Comprehensive Income (Loss), Net of Tax
Stockholders equity	26,636	2,254
Foreign currency translation
Tax
Tax related to AOCI	8,177	8,177
Accumulated Other Comprehensive Income (Loss), Net of Tax
Stockholders equity	$ (32,776)	$ (22,854)

Stockholders' Equity - Pre-tax

Stockholders' Equity - Pre-tax and After-tax Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
After-tax amount
Pre-tax amount	$ 19,718	$ 7,427	$ 5,812
Tax benefit/(expense)	(7,934)	2,769	(7,392)
After-tax amount	11,784	10,196	(1,580)
Amortization of net gains and (losses)
After-tax amount
Pre-tax amount	(3,383)	10,917	2,627
Tax benefit/(expense)	836	(2,757)	(791)
After-tax amount	(2,547)	8,160	1,836
Amortization of prior service cost
After-tax amount
Pre-tax amount	(210)	(232)	(232)
Tax benefit/(expense)	52	58	58
After-tax amount	(158)	(174)	(174)
Settlement gain (loss)
After-tax amount
Pre-tax amount	39	2,059	64
Tax benefit/(expense)	(10)	(515)	(16)
After-tax amount	29	1,544	48
Benefit plans, net
After-tax amount
Pre-tax amount	(3,554)	12,744	2,459
Tax benefit/(expense)	878	(3,214)	(749)
After-tax amount	(2,676)	9,530	1,710
Net loss (gain) from hedging activities
After-tax amount
Pre-tax amount	33,194	3,885	1,569
Tax benefit/(expense)	(8,812)	(971)	(392)
After-tax amount	24,382	2,914	1,177
Foreign currency translation
After-tax amount
Pre-tax amount	(9,922)	(9,202)	1,784
Tax benefit/(expense)	0	6,954	(6,251)
After-tax amount	$ (9,922)	$ (2,248)	$ (4,467)

Stockholders' Equity - Change b

Stockholders' Equity - Change by Component (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	$ 740,737
Ending balance	707,229	$ 740,737
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	(5,792)	(15,265)
Other comprehensive income (loss) before reclassifications	11,114	19,245
Amounts reclassified from accumulated other comprehensive income	670	(9,772)
Total other comprehensive income (loss)	11,784	9,473
Ending balance	5,992	(5,792)
Defined benefit and other postretirement plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	14,808	5,278
Other comprehensive income (loss) before reclassifications	(2,832)	5,622
Amounts reclassified from accumulated other comprehensive income	156	3,908
Total other comprehensive income (loss)	(2,676)	9,530
Ending balance	12,132	14,808
Net gain (loss) from hedging activities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	2,254	(660)
Other comprehensive income (loss) before reclassifications	23,868	2,580
Amounts reclassified from accumulated other comprehensive income	514	334
Total other comprehensive income (loss)	24,382	2,914
Ending balance	26,636	2,254
Foreign currency translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	(22,854)	(19,883)
Other comprehensive income (loss) before reclassifications	(9,922)	11,043
Amounts reclassified from accumulated other comprehensive income	0	(14,014)
Total other comprehensive income (loss)	(9,922)	(2,971)
Ending balance	$ (32,776)	$ (22,854)

Stockholders' Equity - Reclassi

Stockholders' Equity - Reclassifications out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense)									$ 158	$ 4,511	$ (5,021)
Interest expense, net									37,217	36,990	50,409
Net income (loss) from discontinued operations, net of tax	$ 3,902	$ 0	$ 0	$ 0	$ 17,712	$ (75,872)	$ 6,520	$ (89,770)	3,902	(141,410)	(335,984)
Total before tax									(94,735)	(13,941)	(2,215)
Tax benefit (expense)									24,940	12,147	(52,065)
Net of tax	$ (25,252)	$ (21,325)	$ (19,245)	$ (7,875)	$ (25,435)	$ 71,183	$ 1,350	$ 92,518	(73,697)	139,616	$ 281,704
Amount of gain (loss) reclassified from AOCI into income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax									670	(9,772)
Defined benefit and other postretirement plans | Amount of gain (loss) reclassified from AOCI into income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax									207	3,964
Tax benefit (expense)									(51)	(56)
Net of tax									156	3,908
Prior service credit | Amount of gain (loss) reclassified from AOCI into income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense)									210	232
Actuarial losses | Amount of gain (loss) reclassified from AOCI into income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense)									(3)	(5)
Release of actuarial losses | Amount of gain (loss) reclassified from AOCI into income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss) from discontinued operations, net of tax									0	3,737
Net gain (loss) from hedging activities | Amount of gain (loss) reclassified from AOCI into income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax benefit (expense)									(169)	(110)
Net of tax									514	334
Net gain (loss) from hedging activities | Amount of gain (loss) reclassified from AOCI into income | Interest rate caps
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense, net									683	444
Accumulated Foreign Currency Adjustment Attributable to Disposal Group | Amount of gain (loss) reclassified from AOCI into income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income (loss) from discontinued operations, net of tax									$ 0	$ (14,014)

Treasury Stock Repurchases (Det

Treasury Stock Repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended			12 Months Ended
	Apr. 27, 2022	Dec. 31, 2022	Sep. 30, 2022	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Mar. 12, 2020
Equity, Class of Treasury Stock [Line Items]
Remaining authorized repurchase amount		$ 313,298			$ 313,298
Fair value of shares withheld for tax payments					$ 332	$ 1,470	$ 2,539
March 2020 Stock Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount								$ 50,000
Shares acquired				0		0
April 2022 Stock Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount	$ 450,000
Stock repurchase program, period	4 years
April 2022 Stock Repurchase Program | Open Market [Member]
Equity, Class of Treasury Stock [Line Items]
Shares acquired					1,970,763
Average cost per share					$ 9.82
Repurchases of common shares value		$ 19,356			$ 19,356
April 2022 Stock Repurchase Program | Secondary Offering [Member]
Equity, Class of Treasury Stock [Line Items]
Shares acquired		8,000,000	6,500,000
Average cost per share		$ 7.88	$ 8.36
Repurchases of common shares value		$ 117,346			$ 117,346

Dividends Paid (Details)

Dividends Paid (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Equity [Abstract]
Cas dividend per share	$ 3.20	$ 1.80

Other Operating Expense, Net (D

Other Operating Expense, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other Income and Expenses [Abstract]
Amortization expense	$ 10,562	$ 10,321	$ 8,689
Transaction and other related costs	6,988	2,268	1,033
Restructuring, integration and business optimization costs	11,566	3,866	1,994
Net loss on asset disposals	(3,594)	(5,666)	(4,722)
Other, net	2,201	2,152	1,404
Other operating expense, net	$ 34,911	$ 24,273	$ 17,842

Inventories (Details)

Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Inventory, Net
Finished products and work in process	$ 39,909	$ 46,894
Raw materials	4,453	6,919
Inventory, Net	44,362	53,813
Valued at lower of cost or market:
LIFO basis	25,258	33,330
Valued at Lower of Cost and Net Realizable Value [Abstract]
FIFO or average cost basis	19,104	20,483
Inventory, Net	$ 44,362	$ 53,813

Inventories, Net - Narratives (

Inventories, Net - Narratives (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Business Combinations
Inventory
Lower inventory valuation if FIFO rather than LIFO	$ 7,002	$ 6,837

Investments in Affiliated Com_3

Investments in Affiliated Companies - Narratives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition
Amortization of investment in affiliate step-up	$ (6,402)	$ (6,480)
Equity Method Investee
Business Acquisition
Due from related parties	3,539	6,739
Related party sales	5,915	3,643	$ 7,042
Purchases from related party	0	0	0
Business Combination
Business Acquisition
Net purchase accounting fair value adjustments	231,017	237,419
Amortization of investment in affiliate step-up	$ 6,403	$ 6,480	$ 6,634

Investments in Affiliated Com_4

Investments in Affiliated Companies - Ownership Percentage (Details)	Dec. 31, 2022
Zeolyst International
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50%
Zeolyst C.V.
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50%

Investments in Affiliated Com_5

Investments in Affiliated Companies - Summarized Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Current assets	$ 267,704	$ 291,669
Current liabilities	129,403	145,081
Equity method investments
Schedule of Equity Method Investments [Line Items]
Current assets	278,330	245,859
Noncurrent assets	196,775	223,982
Current liabilities	47,407	43,337
Noncurrent liabilities	$ 16,000	$ 7,471

Investments in Affiliated Com_6

Investments in Affiliated Companies - Summarized Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Gross profit	$ 49,367	$ 67,669	$ 59,859	$ 47,735	$ 54,425	$ 53,644	$ 38,473	$ 30,119	$ 224,630	$ 176,661	$ 150,953
Operating income	22,002	38,536	27,411	16,436	17,979	22,494	11,652	2,482	104,385	54,607	51,566
Net income	$ 25,252	$ 21,325	$ 19,245	$ 7,875	$ 25,435	$ (71,183)	$ (1,350)	$ (92,518)	73,697	(139,616)	(281,704)
Equity method investments
Schedule of Equity Method Investments [Line Items]
Sales									306,511	296,416	275,621
Gross profit									105,693	101,069	88,616
Operating income									67,169	66,978	53,500
Net income									$ 68,255	$ 68,433	$ 55,328

Investments in Affiliated Com_7

Investments in Affiliated Companies - Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Equity Method Investments
Balance at beginning of period	$ 446,074	$ 458,128
Equity in net income of affiliated companies	34,128	34,216
Amortization of investment in affiliate step-up	(6,402)	(6,480)
Dividends received from affiliated companies	(35,000)	(35,000)	$ (40,000)
Foreign currency translation adjustments	(2,787)	(4,790)
Balance at end of period	$ 436,013	$ 446,074	$ 458,128

Property, Plant and Equipment_2

Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 986,313	$ 935,285
Less: accumulated depreciation	(401,424)	(339,054)
Property, plant and equipment, net	584,889	596,231
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	96,659	97,047
Building and building improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	82,061	77,851
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	751,145	714,435
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 56,448	$ 45,952

Property, Plant and Equipment -

Property, Plant and Equipment - Narratives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Abstract]
Depreciation	$ 65,121	$ 65,955	$ 65,333

Leases - Narratives (Details)

Leases - Narratives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating lease cost	$ 10,318	$ 9,825
Finance Lease and Obligation, Cost	$ 3,400	$ 1,656

Leases - Right-of-Use Lease Ass

Leases - Right-of-Use Lease Assets and Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets
Operating lease assets	$ 28,265	$ 30,115
Finance lease and financing obligation assets	$ 21,506	$ 29,737
Finance lease asset, balance sheet line item	Property, plant and equipment, net	Property, plant and equipment, net
Operating and finance right-of-use lease assets, total	$ 49,771	$ 59,852
Current:
Operating lease liabilities	8,155	8,306
Finance lease and financing obligation liabilities	$ 2,855	$ 3,181
Finance lease liabilities, current, balance sheet line item	Accrued liabilities	Accrued liabilities
Noncurrent:
Operating lease liabilities	$ 20,021	$ 21,719
Finance lease and financing obligation liabilities	$ 7,633	$ 11,667
Finance lease liabilities, noncurrent, balance sheet line item	Other long-term liabilities	Other long-term liabilities
Total leased liabilities	$ 38,664	$ 44,873

Leases - Remaining Average Weig

Leases - Remaining Average Weighted Average Lease Term and Discount Rates (Details)	Dec. 31, 2022	Dec. 31, 2021
Weighted average remaining lease term (in years)
Operating leases	4 years 5 months 12 days	4 years 9 months 14 days
Finance leases and financing obligation	3 years 6 months 25 days	4 years 8 months 8 days
Weighted Average discount rate:
Operating leases	5.24%	5.02%
Finance leases and financing obligation	0.0286	0.0286

Leases - Lease Maturity Schedul

Leases - Lease Maturity Schedule - ASC 842 (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Operating Leases
2023	$ 9,339
2024	7,748
2025	5,797
2026	4,166
2027	2,770
Thereafter	1,979
Total lease payments	31,799
Less: Interest	(3,623)
Total lease liabilities	28,176
Finance Leases and Financing Obligation
2023	3,063
2024	3,063
2025	3,036
2026	1,878
2027	0
Thereafter	0
Total lease payments	11,040
Less: Interest	(552)
Total lease liabilities	$ 10,488

Leases - Other Lease Informatio

Leases - Other Lease Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash paid for amounts included in the measurement of lease liabilities: [Abstract]
Operating lease payments	$ 10,327	$ 9,755
Finance lease and financing obligation lease payments	339	189
Principal payments under finance leases and financing obligations included in financing cash flows	2,724	1,466
Right-of-Use Assets Obtained in Exchange for New Lease Liabilities (Non-Cash): [Abstract]
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 7,462	$ 9,526

Reportable Segments - Narrative

Reportable Segments - Narratives (Details)	12 Months Ended
	Dec. 31, 2022
Segment Reporting [Abstract]
Number of operating segments	2
Number of reporting units	2
Reportable segments	2

Reportable Segments - Summary F

Reportable Segments - Summary Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales	$ 182,740	$ 232,533	$ 225,172	$ 179,714	$ 170,197	$ 167,428	$ 146,952	$ 126,624	$ 820,159	$ 611,201	$ 495,920
Adjusted EBITDA from reportable segments									305,738	265,700	231,702
Equity in net income from affiliated companies									27,725	27,737	21,065
Amortization of investment in affiliate step-up									(6,402)	(6,480)
Ecoservices
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales									702,472	500,513	401,913
Adjusted EBITDA from reportable segments									227,760	177,672	157,198
Catalyst Technologies
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales									117,687	110,688	94,007
Adjusted EBITDA from reportable segments									77,978	88,028	74,504
Zeolyst Joint Venture | Catalyst Technologies
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales									132,588	131,332	128,623
Adjusted EBITDA from reportable segments									50,331	49,872	42,515
Equity in net income from affiliated companies									27,931	27,827	21,157
Amortization of investment in affiliate step-up									6,403	6,480	6,634
Joint venture depreciation, amortization and interest									$ 15,997	$ 15,565	$ 14,724

Reportable Segments - Reconcili

Reportable Segments - Reconciliation of Net Income to Adjusted EBITDA (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information
Income from continuing operations before income taxes	$ 94,735	$ 13,941	$ 2,215
Interest expense, net	37,217	36,990	50,409
Depreciation and amortization	79,163	79,741	76,926
Adjusted EBITDA from reportable segments	305,738	265,700	231,702
Amortization of investment in affiliate step-up	(6,402)	(6,480)
Debt extinguishment costs	0	26,902	25,028
Net loss on asset disposals	3,594	5,666	4,722
Foreign currency exchange loss (gain)	978	4,716	(5,264)
Transaction and other related costs	6,988	2,268	1,033
Equity-based compensation	20,632	31,838	17,194
Segment reconciling items
Segment Reporting Information
Joint venture depreciation, amortization and interest	15,997	15,565	14,724
Amortization of investment in affiliate step-up	6,402	6,480	6,634
Debt extinguishment costs	0	26,902	25,028
Net loss on asset disposals	3,594	5,666	4,722
Foreign currency exchange loss (gain)	1,388	4,716	(5,264)
LIFO benefit	(165)	(1,931)	(5,262)
Transaction and other related costs	6,988	2,009	1,118
Equity-based compensation	20,632	31,838	17,194
Restructuring, integration and business optimization expenses	11,566	3,866	1,994
Other	(821)	1,828	2,177
Operating segments
Segment Reporting Information
Adjusted EBITDA from reportable segments	305,738	265,700	231,702
Corporate
Segment Reporting Information
Adjusted EBITDA from reportable segments	$ 29,042	$ 38,089	$ 39,087

Reportable Segments - Capital E

Reportable Segments - Capital Expenditures (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets
Capital expenditures	$ 58,870	$ 60,045	$ 54,837
Operating segments | Ecoservices
Revenues from External Customers and Long-Lived Assets
Capital expenditures gross	47,770	43,561	31,799
Operating segments | Catalyst Technologies
Revenues from External Customers and Long-Lived Assets
Capital expenditures gross	8,194	15,997	11,177
Operating segments | Corporate
Revenues from External Customers and Long-Lived Assets
Capital expenditures gross	$ 2,906	$ 487	$ 11,861

Reportable Segments - Sales by

Reportable Segments - Sales by Geography (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets
Sales	$ 182,740	$ 232,533	$ 225,172	$ 179,714	$ 170,197	$ 167,428	$ 146,952	$ 126,624	$ 820,159	$ 611,201	$ 495,920
Products | Sales | Customer Concentration Risk
Revenues from External Customers and Long-Lived Assets
Concentration Risk, Percentage									12.30%	12.60%	10.40%
United States
Revenues from External Customers and Long-Lived Assets
Sales									$ 774,119	$ 571,587	$ 443,682
Other foreign countries
Revenues from External Customers and Long-Lived Assets
Sales									$ 46,040	$ 39,614	$ 52,238

Reportable Segments - Assets by

Reportable Segments - Assets by Geography (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets
Long-lived assets	$ 613,154	$ 626,346
United States
Revenues from External Customers and Long-Lived Assets
Long-lived assets	587,726	597,506
Other foreign countries
Revenues from External Customers and Long-Lived Assets
Long-lived assets	$ 25,428	$ 28,840

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets - Goodwill Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Goodwill
Beginning balance	$ 406,139	$ 391,565
Goodwill recognized		14,778
Goodwill adjustments	(81)
Foreign exchange impact	(2,895)	(204)
Ending balance	403,163	406,139
Ecoservices
Goodwill
Beginning balance	326,670	311,892
Goodwill recognized		14,778
Goodwill adjustments	(81)
Foreign exchange impact	0	0
Ending balance	326,589	326,670
Catalyst Technologies
Goodwill
Beginning balance	79,469	79,673
Goodwill recognized		0
Foreign exchange impact	(2,895)	(204)
Ending balance	$ 76,574	$ 79,469

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets - Narratives (Details)	12 Months Ended
	Dec. 31, 2022
Goodwill
Number of reporting units	2
Number of operating segments	2

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 224,256	$ 226,679
Net Balance	129,932	145,617
Definite-lived Intangible assets, net
Accumulated Amortization	(94,324)	(81,062)
Net Balance	100,879
Amortization expense	10,562	10,321	$ 8,689
Indefinite-lived trade names
Indefinite-lived intangible assets, net
Gross Carrying Amount	25,153	25,627
Net Balance	25,153	25,627
In-process research and development
Indefinite-lived intangible assets, net
Gross Carrying Amount	3,900	3,900
Net Balance	3,900	3,900
Finite-Lived Intangible Assets
Definite-lived Intangible assets, net
Gross Carrying Amount	195,203	197,152
Accumulated Amortization	(94,324)	(81,062)
Net Balance	100,879	116,090
Technical know-how
Definite-lived Intangible assets, net
Gross Carrying Amount	54,880	55,922
Accumulated Amortization	(23,822)	(20,648)
Net Balance	$ 31,058	35,274
Technical know-how | Minimum
Definite-lived Intangible assets, net
Finite lived intangible assets useful life	10 years
Technical know-how | Maximum
Definite-lived Intangible assets, net
Finite lived intangible assets useful life	20 years
Customer relationships
Definite-lived Intangible assets, net
Gross Carrying Amount	$ 130,636	131,248
Accumulated Amortization	(66,669)	(57,262)
Net Balance	$ 63,967	73,986
Customer relationships | Minimum
Definite-lived Intangible assets, net
Finite lived intangible assets useful life	10 years
Customer relationships | Maximum
Definite-lived Intangible assets, net
Finite lived intangible assets useful life	15 years
Non-compete agreements
Definite-lived Intangible assets, net
Gross Carrying Amount	$ 700	700
Accumulated Amortization	(257)	(117)
Net Balance	$ 443	583
Finite lived intangible assets useful life	5 years
Trademarks
Definite-lived Intangible assets, net
Gross Carrying Amount	$ 7,387	7,682
Accumulated Amortization	(3,283)	(2,902)
Net Balance	$ 4,104	4,780
Finite lived intangible assets useful life	15 years
Indefinite-lived trade names
Definite-lived Intangible assets, net
Gross Carrying Amount	$ 1,600	1,600
Accumulated Amortization	(293)	(133)
Net Balance	$ 1,307	$ 1,467
Finite lived intangible assets useful life	10 years

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets - Future Amortization (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity
2023	$ 14,023
2024	14,023
2025	14,023
2026	12,881
2027	12,346
Thereafter	33,583
Total estimated future aggregate amortization expense	$ 100,879

Accrued Liabilities Accrued L_2

Accrued Liabilities Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Payables and Accruals [Abstract]
Compensation and bonus	$ 30,890	$ 30,079
Interest	10,493	5,650
Property taxes	2,123	2,144
Income taxes	4,412	9,864
Finance lease and financing obligation liabilities	2,855	3,181
Dividends payable	4,062	8,574
Accrued closing adjustments for Performance Chemicals divestiture	0	3,745
Other	17,394	12,678
Accrued Liabilities, Current, Total	$ 72,229	$ 75,915

Long-term Debt (Details)

Long-term Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Jun. 09, 2021
Debt Instrument [Line Items]
Total debt	$ 886,500	$ 895,500
Original issue discount	(7,472)	(8,762)
Deferred financing costs	(4,158)	(4,899)
Total debt, net of original issue discount and deferred financing costs	874,870	881,839
Less: current portion	(9,000)	(9,000)
Total long-term debt, excluding current portion	865,870	872,839
ABL Facility
Debt Instrument [Line Items]
Total debt	0	0
Term Loan Facility | 2021 Term Loan Facility
Debt Instrument [Line Items]
Total debt	$ 886,500	$ 895,500	$ 900,000

Long-term Debt - ABL Facility (

Long-term Debt - ABL Facility (Details) $ in Thousands	Feb. 17, 2023	Jun. 09, 2021 USD ($)	Mar. 20, 2020 USD ($)	May 04, 2016 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021
Debt Instrument [Line Items]
ABL maximum borrowing capacity		$ 100,000	$ 250,000
Increase amount of ABL commitments		150,000	$ 50,000
Commitment fee percentage				0.375%
ABL Facility
Debt Instrument [Line Items]
ABL maximum borrowing capacity				$ 200,000
Potential commitment fee percentage				0.25%
Minimum | ABL Facility | LIBOR
Debt Instrument [Line Items]
Variable basis spread			1.25%
Minimum | ABL Facility | Base Rate [Member]
Debt Instrument [Line Items]
Variable basis spread			0.25%
Minimum | ABL Facility | Base Rate [Member] | Subsequent Event
Debt Instrument [Line Items]
Variable basis spread	0.25%
Minimum | ABL Facility | Secured Overnight Financing Rate | Subsequent Event
Debt Instrument [Line Items]
Variable basis spread	1.25%
Maximum | ABL Facility | LIBOR
Debt Instrument [Line Items]
Variable basis spread			1.75%
Maximum | ABL Facility | Base Rate [Member]
Debt Instrument [Line Items]
Variable basis spread			0.75%
Maximum | ABL Facility | Base Rate [Member] | Subsequent Event
Debt Instrument [Line Items]
Variable basis spread	0.75%
Maximum | ABL Facility | Secured Overnight Financing Rate | Subsequent Event
Debt Instrument [Line Items]
Variable basis spread	1.75%
ABL Facility
Debt Instrument [Line Items]
Letters of credit outstanding					$ 4,043
Debt instrument, covenant, fixed charge coverage ratio						1
USD
Debt Instrument [Line Items]
ABL maximum borrowing capacity		90,000	$ 195,000
Euro
Debt Instrument [Line Items]
ABL maximum borrowing capacity		$ 10,000	40,000
Canada, Dollars
Debt Instrument [Line Items]
ABL maximum borrowing capacity			$ 15,000

Long-term Debt - 2021 Term Loan

Long-term Debt - 2021 Term Loan Facility (Details) - USD ($) $ in Thousands			12 Months Ended
	Feb. 09, 2023	Jun. 09, 2021	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total debt			$ 886,500	$ 895,500
2021 Term Loan Facility
Debt Instrument [Line Items]
Debt Instrument, Original Issue Discount		0.25%
Debt Instrument, Variable Rate Floor		0.50%
Variable basis spread		2.75%
Debt instrument, first lien leverage ratio		2.50%
Scheduled quarterly principal payments		0.25%
2021 Term Loan Facility | Subsequent Event
Debt Instrument [Line Items]
Debt instrument, first lien leverage ratio	2.50%
2021 Term Loan Facility | Secured Overnight Financing Rate | Subsequent Event
Debt Instrument [Line Items]
Debt Instrument, Variable Rate Floor	0.50%
2021 Term Loan Facility | Term Loan Facility
Debt Instrument [Line Items]
Total debt		$ 900,000	$ 886,500	$ 895,500
2021 Term Loan Facility | Term Loan Facility | LIBOR
Debt Instrument [Line Items]
Variable basis spread			275%
2021 Term Loan Facility | Term Loan Facility | Secured Overnight Financing Rate | Subsequent Event
Debt Instrument [Line Items]
Variable basis spread	2.75%

Long-term Debt - 2018 Term Faci

Long-term Debt - 2018 Term Facility (Details) - USD ($) $ in Thousands		12 Months Ended
	Aug. 01, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Feb. 08, 2018	Dec. 11, 2017
Debt Instrument [Line Items]
Mandatory payments		$ 9,000	$ 1,430,863	$ 1,091,134
2018 Term Loan Facility
Debt Instrument [Line Items]
Mandatory payments	$ 231,363
2018 Term Loan Facility | Term Loan Facility
Debt Instrument [Line Items]
Debt instrument face amount					$ 1,267,000
Write off of deferred financing costs	849
Write-off of original issue discount	$ 2,395
Five Point Seven Five Percent Senior Unsecured Notes due 2025 [Member] | Unsecured Notes
Debt Instrument [Line Items]
Debt instrument face amount						$ 300,000

Long-term Debt - 2020 Term Loan

Long-term Debt - 2020 Term Loan Facility (Details) - USD ($)	Jul. 22, 2020	May 04, 2016
2020 Term Loan Facility | Term Loan Facility | LIBOR
Debt Disclosure [Abstract]
Debt instrument face amount	$ 650,000
Debt Instrument [Line Items]
Debt instrument face amount	$ 650,000
Six Point Seven Five Percent Senior Secured Notes due 2022 [Member] | Senior Notes
Debt Disclosure [Abstract]
Debt instrument face amount		$ 625,000,000
Debt instrument stated interest rate		6.75%
Debt Instrument [Line Items]
Debt instrument face amount		$ 625,000,000
Debt instrument stated interest rate		6.75%

Long-term Debt - Senior Unsecur

Long-term Debt - Senior Unsecured Note (Details) - Five Point Seven Five Percent Senior Unsecured Notes due 2025 [Member] - USD ($) $ in Thousands		12 Months Ended
	Aug. 01, 2021	Dec. 31, 2021	Dec. 11, 2017
Unsecured Notes
Debt Instrument [Line Items]
Debt instrument face amount			$ 300,000
Debt instrument stated interest rate			5.75%
Senior Notes
Debt Instrument [Line Items]
Repayments of Debt	$ 295,000
Repayment of note		$ 8,481
Write off of deferred financing costs		2,262
Write-off of original issue discount		$ 1,198

Long-term Debt - Fair Value (De

Long-term Debt - Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
2021 Term Loan Facility
Debt Instrument [Line Items]
Fair value of debt	$ 870,986	$ 894,381

Long-term Debt - Debt Extinguis

Long-term Debt - Debt Extinguishment Costs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
ABL Facility
Debt Instrument [Line Items]
Write off of deferred financing costs	$ 485
Write-off of original issue discount	107
2021 Term Loan Facility | Term Loan Facility
Debt Instrument [Line Items]
Debt extinguishment costs	5,736
Write off of deferred financing costs	1,725
Write-off of original issue discount	$ 3,664

Long-term Debt - Aggregate Long

Long-term Debt - Aggregate Long-term Debt Maturities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Long-term Debt, Fiscal Year Maturity
2023	$ 9,000
2024	9,000
2025	9,000
2025	9,000
2027	9,000
Thereafter	841,500
Total debt	$ 886,500	$ 895,500

Other Long-term Liabilities O_2

Other Long-term Liabilities Other Long-term Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Other Liabilities Disclosure [Abstract]
Pension plan liabilities	$ 6,250	$ 3,551
Other postretirement benefit plan liabilities	428	607
Derivative liability, noncurrent	2,071	0
Finance lease and financing obligation liabilities	7,633	11,667
Reserve for uncertain tax positions	8,215	7,658
Other	1,249	611
Other Liabilities, Noncurrent, Total	$ 25,846	$ 24,094

Financial Instruments - Narrati

Financial Instruments - Narratives (Details) € in Thousands, $ in Thousands

1 Months Ended

12 Months Ended

26 Months Ended

Nov. 30, 2022 USD ($)

Jan. 14, 2022 USD ($)

Feb. 28, 2020 USD ($)

Nov. 30, 2018 USD ($)

Mar. 31, 2020 USD ($)

Jul. 31, 2016 USD ($)

Dec. 31, 2022 USD ($)

Dec. 31, 2021 USD ($)

Dec. 31, 2020 USD ($)

Jan. 31, 2022 USD ($) contracts

Aug. 31, 2021 USD ($)

Jul. 31, 2020 USD ($)

Mar. 20, 2020

Oct. 01, 2019 EUR (€)

Nov. 13, 2018 USD ($)

Derivative [Line Items]

Amount of derivative loss expected to be transfered from OCI

$ 214

Cash flow hedging

Derivative [Line Items]

Derivative, Notional Amount Novated

$ 900,000

Cash flow hedging | July 2016 interest rate cap

Derivative [Line Items]

Premium paid to acquire derivative instrument

$ 1,551

Derivative, notional amount

$ 1,000,000

Cash flow hedging | July 2016 interest rate cap | Minimum

Derivative [Line Items]

Derivative, cap interest rate

1.50%

Cash flow hedging | July 2016 interest rate cap | Maximum

Derivative [Line Items]

Derivative, cap interest rate

3%

Cash flow hedging | November 2018 interest rate cap

Derivative [Line Items]

Premium paid to acquire derivative instrument

$ 130

$ 3,380

$ 900

$ 4,410

Derivative, cap interest rate

2.50%

0.84%

3.50%

Derivative, notional amount

$ 500,000

$ 500,000

Cash flow hedging | July 2020 interest rate cap

Derivative [Line Items]

Premium paid to acquire derivative instrument

$ 137

Derivative, cap interest rate

1%

Derivative, notional amount

$ 400,000

Cash flow hedging | January 2022 interest rate caps

Derivative [Line Items]

Premium paid to acquire derivative instrument

$ 4,450

Derivative, number of interest rate caps | contracts

2

Cash flow hedging | January 2022 interest rate cap expiring October 2024

Derivative [Line Items]

Derivative, cap interest rate

1%

Derivative, notional amount

$ 250

Cash flow hedging | January 2022 interest rate cap expiring October 2025

Derivative [Line Items]

Derivative, cap interest rate

1%

Derivative, notional amount

$ 250

Cash flow hedging | January 2022 Interest Rate Cap

Derivative [Line Items]

Derivative, cap interest rate

1%

Cash flow hedging | November 2022 interest rate cap - year 1

Derivative [Line Items]

Premium paid to acquire derivative instrument

$ 5,268

Derivative, cap interest rate

1%

Derivative, notional amount

$ 150,000

Cash flow hedging | November 2022 Interest Rate Cap - July 2024 to July 2026

Derivative [Line Items]

Premium paid to acquire derivative instrument

$ 6,145

Derivative, cap interest rate

1%

Derivative, notional amount

$ 175,000

Net investment hedging | Cross currency swaps

Derivative [Line Items]

Premium paid to acquire derivative instrument

$ 13,170

Derivative, notional amount

$ 311,380

€ 280,000

Financial Instruments - Fair Va

Financial Instruments - Fair Value (Details) - USD ($) $ in Thousands	Jan. 14, 2022	Dec. 31, 2022	Dec. 31, 2021
Derivative assets:
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]		Prepaid and other current assets	Prepaid and other current assets
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]		Other long-term assets	Other long-term assets
Derivative asset, current		$ 18,510	$ 0
Derivative liabilities:
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]		Accrued liabilities	Accrued liabilities
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]		Other long-term liabilities	Other long-term liabilities
Derivative liability, noncurrent		$ 2,071	$ 0
Cash flow hedging | January 2022 interest rate caps
Derivative liabilities:
Premium paid to acquire derivative instrument	$ 4,450
Derivatives designated as cash flow hedges:
Derivative assets:
Derivative asset		34,374	1,080
Derivative liabilities:
Derivative liability		2,071	1,288
Derivatives designated as cash flow hedges: | Cash flow hedging | Interest rate caps
Derivative assets:
Derivative asset, current		18,510	0
Derivative asset, noncurrent		15,864	1,080
Derivative liabilities:
Derivative liability, current		0	1,288
Derivative liability, noncurrent		$ 2,071	$ 0

Financial Instruments - Effect

Financial Instruments - Effect on Other Comprehensive Income (Details) - Interest rate caps - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Amount of gain (loss) recognized in OCI on derivatives
Amount of gain (loss) recognized in OCI on derivatives	$ 32,510	$ 3,441	$ 167
Interest expense
Amount of gain (loss) reclassified from AOCI into income
Amount of gain (loss) reclassified from AOCI into income	$ (683)	$ (444)	$ (54)

Financial Instruments - Cash Fl

Financial Instruments - Cash Flow Hedge Impact on Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Cost of goods sold	$ (595,529)	$ (434,540)	$ (344,967)
Interest (expense) income	(37,217)	(36,990)	(50,409)
Gain (loss) on cash flow hedging relationships | Amount of gain (loss) reclassified from AOCI into income
Derivative [Line Items]
Interest (expense) income	$ (683)	$ (444)	$ (54)

Financial Instruments - Net Inv

Financial Instruments - Net Investment Hedge Impact on AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Location of gain (loss) reclassified from AOCI into income	Net income (loss) from discontinued operations, net of tax	Net income (loss) from discontinued operations, net of tax	Net income (loss) from discontinued operations, net of tax
Amount of gain (loss) reclassified from AOCI into income		$ 9,754	$ 1,967
Interest (expense) income
Derivative [Line Items]
Amount of gain (loss) recognized in income on derivative (amount excluded from effectiveness testing)		545	5,090
Cross currency swaps
Derivative [Line Items]
Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), before Reclassification and Tax		$ 9,787	$ (23,622)

Income Taxes - Narratives (Deta

Income Taxes - Narratives (Details) - USD ($) $ in Thousands		12 Months Ended
	Nov. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Loss Carryforwards
Provision (benefit) for income taxes		$ 24,940	$ 12,147	$ (52,065)
Net deferred tax liability		135,406	126,580
Unrecognized tax benefit that would impact effective tax rate		7,787
Accrued penalties and interest		558	$ 0
November 2022 interest rate cap - year 1 | Cash flow hedging
Operating Loss Carryforwards
Premium paid to acquire derivative instrument	$ 5,268
Valuation Allowance of Deferred Tax Assets
Operating Loss Carryforwards
Net change in period		$ (9,242)

Income Taxes - Income (loss) be

Income Taxes - Income (loss) before Income Taxes and Noncontrolling interest (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Domestic	$ 86,695	$ 6,185	$ (10,454)
Foreign	8,040	7,756	12,669
Income from continuing operations before income taxes and noncontrolling interest	$ 94,735	$ 13,941	$ 2,215

Income Taxes - Provision for In

Income Taxes - Provision for Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current:
Federal	$ 18,210	$ 2,469	$ 0
State	3,100	1,813	1,982
Foreign	1,978	3,317	6,013
Current income tax	23,288	7,599	7,995
Deferred:
Federal	4,544	(1,813)	(58,125)
State	(2,288)	2,551	(2,596)
Foreign	(604)	3,810	661
Deferred income tax	1,652	4,548	(60,060)
Total	$ 24,940	$ 12,147	$ (52,065)

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Statutory Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Tax at statutory rate	$ 19,894	$ 2,928	$ 314
State income taxes, net of federal income tax benefit	248	3,942	(401)
Changes in uncertain tax positions	558	877	164
Rate changes	0	5,209	4,274
Stock compensation	1,876	197	318
Compensation Disallowance under 162(m)	3,146	466	206
Foreign tax credits	0	(759)	(56,359)
Research and development tax credits	(366)	(620)	(717)
Other, net	(416)	(93)	136
Total	$ 24,940	$ 12,147	$ (52,065)

Income Taxes - Components of De

Income Taxes - Components of Deferred Tax Asset (Liability) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Net operating loss carryforwards	$ 13,705	$ 24,107
Interest disallowance carryforward	228	24
Pension	879	227
Operating lease liability	6,873	7,362
Other	10,653	14,732
State credits	13,773	13,110
Foreign withholding taxes	9,083	9,083
Valuation allowance	(30,615)	(39,857)
Deferred tax asset net of valuation	24,579	28,788
Deferred tax liabilities:
Depreciation	(70,400)	(71,815)
Inventory	(3,039)	(2,899)
Intangibles	(63,873)	(62,557)
Operating lease right-of-use assets	(6,763)	(7,384)
Other	(15,910)	(10,713)
Deferred tax liability	(159,985)	(155,368)
Deferred Tax Liabilities, Net	(135,406)	$ (126,580)
Tax Credit Carryforward, Valuation Allowance	10,203
Operating loss carryforward, valuation allowance	$ 10,752

Income Taxes - Change in Unreco

Income Taxes - Change in Unrecognized Tax Position (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Unrecognized tax benefit that would impact effective tax rate	$ 7,787
Accrued penalties and interest	$ 558	$ 0

Income Taxes - Open Tax Years (

Income Taxes - Open Tax Years (Details)	12 Months Ended
	Dec. 31, 2022
Domestic
Income Tax Contingency [Line Items]
Open Tax Year	2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022
State
Income Tax Contingency [Line Items]
Open Tax Year	2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022

Income Taxes - Payment for Taxe

Income Taxes - Payment for Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Loss Carryforwards
Income taxes, net of refunds	$ 25,556	$ 11,843	$ 35,013
Continuing Operations
Operating Loss Carryforwards
Income taxes, net of refunds	13,636	618	1,923
Domestic
Operating Loss Carryforwards
Income taxes, net of refunds	13,277	549	1,894
Foreign
Operating Loss Carryforwards
Income taxes, net of refunds	$ 359	$ (69)	$ 29

Income Taxes - Inflation Reduct

Income Taxes - Inflation Reduction Act (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Income Tax Disclosure [Abstract]
Inflation Reduction Act, Corporate Alternative Minimum Tax	15%
Inflation Reduction Act, Average Annual Adjusted Income Excess	$ 1,000,000
Inflation Reduction Act, Excise Tax on Net Stock Repurchases	1%

Benefit Plans - Change in Benef

Benefit Plans - Change in Benefit Obligation and Plan Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Pension Plans
Defined Benefit Plan, Change in Benefit Obligation
Changes in actuarial (gains) losses due to discount rates	$ (18,641)	$ (3,989)
Changes in actuarial (gains) losses due to demographic experience		(545)
Changes in actuarial (gains) losses due to mortality assumptions		204
Actuarial Gain (Loss), General Experience	(100)	512
Defined Benefit Plan, Change in Fair Value of Plan Assets
Fair value of plan assets at beginning of period	82,914
Fair value of plan assets at end of the period	60,629	82,914
Defined Benefit Pension Plans | United States
Defined Benefit Plan, Change in Benefit Obligation
Benefit obligation at beginning of period	86,465	91,937
Interest cost	2,569	2,210	$ 2,665
Plan settlements	(862)	(1,795)
Benefits paid	(2,552)	(2,069)
Actuarial (gains) losses	(18,741)	(3,818)
Translation adjustment	0	0
Benefit obligation at end of the period	66,879	86,465	91,937
Defined Benefit Plan, Change in Fair Value of Plan Assets
Fair value of plan assets at beginning of period	82,914	80,395
Actual return on plan assets	(18,871)	6,383
Plan settlements	(862)	(1,795)
Benefits paid	(2,552)	(2,069)
Translation adjustment	0	0
Fair value of plan assets at end of the period	60,629	82,914	80,395
Funded status of the plans (underfunded)	(6,250)	(3,551)
Defined Benefit Pension Plans | Foreign
Defined Benefit Plan, Change in Benefit Obligation
Benefit obligation at beginning of period	0	22,210
Interest cost		255	299
Plan settlements		(21,622)
Benefits paid		0
Actuarial (gains) losses		0
Translation adjustment		(843)
Benefit obligation at end of the period		0	22,210
Defined Benefit Plan, Change in Fair Value of Plan Assets
Fair value of plan assets at beginning of period	0	22,210
Actual return on plan assets		255
Plan settlements		(21,622)
Benefits paid		0
Translation adjustment		(843)
Fair value of plan assets at end of the period		0	22,210
Funded status of the plans (underfunded)		0
Underfunded and Unfunded Plans
Defined Benefit Plan, Change in Fair Value of Plan Assets
Funded status of the plans (underfunded)	6,250	3,551
Other Postretirement Benefits Plans
Defined Benefit Plan, Change in Benefit Obligation
Benefit obligation at beginning of period	624	650
Interest cost	18	17	19
Benefits paid	(1)	(1)
Premiums paid	(3)	(2)
Actuarial (gains) losses	(192)	(40)
Benefit obligation at end of the period	446	624	$ 650
Changes in actuarial (gains) losses due to discount rates	(192)	(27)
Changes in actuarial (gains) losses due to demographic experience		(12)
Changes in actuarial (gains) losses due to mortality assumptions		(1)
Defined Benefit Plan, Change in Fair Value of Plan Assets
Fair value of plan assets at beginning of period	0
Benefits paid	(1)	(1)
Defined Benefit Plan, Plan Assets, Premiums Paid	(3)	(2)
Fair value of plan assets at end of the period	0	0
Employer contributions	4	3
Funded status of the plans (underfunded)	$ (446)	$ (624)

Benefit Plans - Recognized on t

Benefit Plans - Recognized on the Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Pension Plans
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position
Noncurrent liability	$ (6,250)	$ (3,551)
Accumulated other comprehensive income (loss)	(509)	(672)
Net amount recognized	(6,759)	(4,223)
Other Postretirement Benefits Plans
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position
Current liability	(18)	(17)
Noncurrent liability	(428)	(607)
Accumulated other comprehensive income (loss)	(299)	(59)
Net amount recognized	$ (745)	$ (683)

Benefit Plans - Accumulated Oth

Benefit Plans - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Pension Plans
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax
Net gain (loss)	$ (1,039)	$ 2,486
Gross amount recognized	(1,039)	2,486
Deferred income taxes	530	(3,158)
Net amount recognized	(509)	(672)
Other Postretirement Benefits Plans
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax
Net gain (loss)	80	(114)
Gross amount recognized	234	250
Deferred income taxes	(533)	(309)
Net amount recognized	(299)	(59)
Prior service credit	$ 154	$ 364

Benefit Plans - Net Periodic Be

Benefit Plans - Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Pension Plans | United States
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Service cost	$ 0	$ 0	$ 769
Interest cost	2,569	2,210	2,665
Expected return on plan assets	(3,433)	(4,360)	(3,898)
Amortization of net (gain) loss	0	0	0
Settlement (gain) loss recognized	38	(26)	78
Net periodic expense (benefit)	(826)	(2,176)	(386)
Defined Benefit Pension Plans | Foreign
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Service cost		0	1,080
Interest cost		255	299
Expected return on plan assets		(255)	(287)
Amortization of net (gain) loss		0	95
Settlement (gain) loss recognized		2,084	0
Net periodic expense (benefit)		2,084	1,187
Other Postretirement Benefits Plans
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
Interest cost	18	17	19
Amortization of prior service credit	(210)	(232)	(232)
Amortization of net (gain) loss	3	5	1
Net periodic expense (benefit)	$ (189)	$ (210)	$ (212)

Benefit Plans - Amounts recogni

Benefit Plans - Amounts recognized in NPBC and OCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure
Translation adjustment	$ 0	$ (82)
Amortization of prior service credit	210	232
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure
Net loss (gain)	3,563	(5,841)
Amortization or settlement recognition of net gain (loss)	(38)	(2,058)
Total recognized in other comprehensive income	3,525	(7,981)
Total recognized in net periodic benefit cost and other comprehensive income	2,699	(7,991)
Other Postretirement Benefits Plans
Defined Benefit Plan Disclosure
Net loss (gain)	(192)	(40)
Amortization or settlement recognition of net gain (loss)	(3)	(5)
Total recognized in other comprehensive income	15	187
Total recognized in net periodic benefit cost and other comprehensive income	$ (174)	$ (23)

Benefit Plans - Projected and A

Benefit Plans - Projected and Accumulated Benefit Obligation (Details) - Defined Benefit Pension Plans - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure
Projected benefit obligation	$ 66,879	$ 86,465
Accumulated benefit obligation	66,879	86,465
Defined Benefit Plan, Plan Assets, Amount	$ 60,629	$ 82,914

Benefit Plans - Weighted Averag

Benefit Plans - Weighted Average Assumptions for Pension Obligation (Details)	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Pension Plans
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation
Discount rate	5.40%	2.90%
Other Postretirement Benefits Plans
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation
Discount rate	5.50%	2.90%

Benefit Plans - Weighted Aver_2

Benefit Plans - Weighted Average Assumptions for Net Periodic Cost (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Pension Plans | United States
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost
Discount rate	2.90%	2.50%	3.40%
Rate of compensation increase			3%
Expected return on assets	4.90%	5.60%	5.70%
Defined Benefit Pension Plans | Foreign
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost
Discount rate		1.20%	1.50%
Rate of compensation increase		1.75%	1.75%
Expected return on assets		1.20%	1.50%
Other Postretirement Benefits Plans
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost
Discount rate	2.90%	2.60%	3.50%

Benefit Plans - Plan Assets (De

Benefit Plans - Plan Assets (Details) $ in Thousands	Dec. 31, 2022 USD ($) plan	Dec. 31, 2021 USD ($)
Defined Benefit Plan Disclosure
Number Of Defined Benefit Pension Plans | plan	2
Defined Benefit Pension Plans
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 60,629	$ 82,914
Defined Benefit Pension Plans | Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	60,629	82,914
Defined Benefit Pension Plans | Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Defined Benefit Pension Plans | Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Defined Benefit Pension Plans | Cash and cash equivalents
Defined Benefit Plan Disclosure
Fair value of plan assets	244	202
Defined Benefit Pension Plans | Cash and cash equivalents | Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	244	202
Defined Benefit Pension Plans | Cash and cash equivalents | Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Defined Benefit Pension Plans | Cash and cash equivalents | Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 0	0
Defined Benefit Pension Plans | Equity Securities | Ecoservices Pension Equity Plan
Defined Benefit Plan Disclosure
Target asset plan allocation percentage	35%
Defined Benefit Pension Plans | Equity Securities | Ecoservices Hourly Pension Plan
Defined Benefit Plan Disclosure
Target asset plan allocation percentage	30%
Defined Benefit Pension Plans | U.S. investment funds
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 11,435	12,150
Defined Benefit Pension Plans | U.S. investment funds | Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	11,435	12,150
Defined Benefit Pension Plans | U.S. investment funds | Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Defined Benefit Pension Plans | U.S. investment funds | Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Defined Benefit Pension Plans | International investment funds
Defined Benefit Plan Disclosure
Fair value of plan assets	7,803	7,816
Defined Benefit Pension Plans | International investment funds | Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	7,803	7,816
Defined Benefit Pension Plans | International investment funds | Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Defined Benefit Pension Plans | International investment funds | Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 0	0
Defined Benefit Pension Plans | Fixed income securities | Ecoservices Pension Equity Plan
Defined Benefit Plan Disclosure
Target asset plan allocation percentage	65%
Defined Benefit Pension Plans | Fixed income securities | Ecoservices Hourly Pension Plan
Defined Benefit Plan Disclosure
Target asset plan allocation percentage	70%
Defined Benefit Pension Plans | Government securities
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 16,209	28,869
Defined Benefit Pension Plans | Government securities | Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	16,209	28,869
Defined Benefit Pension Plans | Government securities | Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Defined Benefit Pension Plans | Government securities | Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Defined Benefit Pension Plans | Corporate bonds
Defined Benefit Plan Disclosure
Fair value of plan assets	24,938	33,877
Defined Benefit Pension Plans | Corporate bonds | Level 1
Defined Benefit Plan Disclosure
Fair value of plan assets	24,938	33,877
Defined Benefit Pension Plans | Corporate bonds | Level 2
Defined Benefit Plan Disclosure
Fair value of plan assets	0	0
Defined Benefit Pension Plans | Corporate bonds | Level 3
Defined Benefit Plan Disclosure
Fair value of plan assets	$ 0	$ 0

Benefit Plans - Benefit Plan, F

Benefit Plans - Benefit Plan, Future Payments (Details) $ in Thousands	Dec. 31, 2022 USD ($)
Defined Benefit Pension Plans
Defined Benefit Plan, Expected Future Benefit Payment
2023	$ 4,751
2024	4,518
2025	4,336
2026	4,419
2027	4,473
Years 2028-2032	22,937
Expected future payments	0
Other Postretirement Benefits Plans
Defined Benefit Plan, Expected Future Benefit Payment
2023	18
2024	19
2025	20
2026	21
2027	22
Years 2028-2032	138
Expected future payments	$ 18

Benefit Plans - Defined Contrib

Benefit Plans - Defined Contribution Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Retirement Benefits [Abstract]
Defined Contribution expense	$ 7,113	$ 7,097	$ 6,467

Stock-Based Compensation - Narr

Stock-Based Compensation - Narratives (Details)	Dec. 31, 2022 shares
2017 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares available for grant (shares)	10,065,830

Stock-Based Compensation - Modi

Stock-Based Compensation - Modifications (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award
Dividends paid on common stock (in dollars per share)		$ 3.20	$ 1.80
Additional stock compensation expense		$ 6,667	$ 2,144
Discontinued Operations
Share-based Compensation Arrangement by Share-based Payment Award
Additional stock compensation expense	$ 654	$ 2,635

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Dividends paid on common stock (in dollars per share)		$ 3.20	$ 1.80
Proceeds from stock options exercised	$ 611	$ 746	$ 373
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding
Beginning balance (shares)	1,884,351	2,173,331	2,374,357
Exercised (shares)	(199,970)	(208,500)	(43,250)
Forfeited (shares)	(51,860)	(39,996)	(157,776)
Expired (shares)	(111,524)	(40,484)
Ending balance (shares)	1,520,997	1,884,351	2,173,331
Exercisable (shares)	1,236,041
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Beginning balance (weighted average exercise price, usd per share)	$ 6.99	$ 9.84	$ 11.44
Exercised (weighted average exercise price, usd per share)	3.06	3.56	8.64
Forfeited (weighted average exercise price, usd per share)	3.98	3.53	9.23
Expired (weighted average exercise price)	11.97	14.52
Ending balance (weighted average exercise price, usd per share)	7.24	$ 6.99	$ 9.84
Exercisable (weighted average exercise price, usd per share)	$ 8.13
Outstanding (weighted average contractual term)	3 years 4 months 9 days
Outstanding (aggregate intrinsic value)	$ 4,720
Exercisable (weighted average contractual term)	3 years 3 months 18 days
Exercisable (aggregate intrinsic value)	$ 3,171
Expiration period	10 years
Intrinsic value of stock options exercised	$ 1,306	$ 1,767	$ 0
Proceeds from stock options exercised	$ 0	$ 0

Stock-Based Compensation - Rest

Stock-Based Compensation - Restricted Stock Awards, Restricted Stock Units and Performance Stock Units (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares
Beginning balance nonvested (shares)	633,724	897,015	1,546,130
Granted (shares)	0	0	0
Vested (shares)	(84,903)	0	(29,760)
Forfeited (shares)	(271,765)	(263,291)	(619,355)
Ending balance nonvested (shares)	277,056	633,724	897,015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Beginning balance nonvested (weighted average grant date fair value, usd per share)	$ 15.84	$ 13.80	$ 8.17
Granted (weighted average grant date fair value, usd per share)	0	0	0
Vested (weighted average grant date fair value, usd per share)	8.83	0	12.32
Forfeited (weighted average grant date fair value, usd per share)	15.84	15.31	8.04
Ending balance nonvested (weighted average grant date fair value, usd per share)	$ 15.66	$ 15.84	$ 13.80
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 749	$ 0	$ 510
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares
Beginning balance nonvested (shares)	2,507,421	1,841,139	1,628,436
Granted (shares)	2,779,690	1,697,623	1,158,605
Vested (shares)	(1,550,969)	(773,619)	(816,866)
Forfeited (shares)	(1,271,424)	(257,722)	(129,036)
Ending balance nonvested (shares)	2,464,718	2,507,421	1,841,139
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Beginning balance nonvested (weighted average grant date fair value, usd per share)	$ 15.68	$ 16.14	$ 15.83
Granted (weighted average grant date fair value, usd per share)	10.28	15.39	16.60
Vested (weighted average grant date fair value, usd per share)	15.08	16	16.17
Forfeited (weighted average grant date fair value, usd per share)	12.27	16.03	16.28
Ending balance nonvested (weighted average grant date fair value, usd per share)	$ 11.73	$ 15.68	$ 16.14
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 15,579	$ 11,507	$ 11,269
Restricted Stock Units | Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Award requisite service period	1 year
Restricted Stock Units | Employee
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Award requisite service period	3 years
Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares
Beginning balance nonvested (shares)	1,117,555	965,736	550,676
Granted (shares)	295,132	211,985	456,311
Vested (shares)	(496,442)	0	0
Forfeited (shares)	(276,713)	(60,166)	(41,251)
Ending balance nonvested (shares)	639,532	1,117,555	965,736
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Beginning balance nonvested (weighted average grant date fair value, usd per share)	$ 16.91	$ 17.69	$ 15.41
Granted (weighted average grant date fair value, usd per share)	8.82	13.21	20.29
Vested (weighted average grant date fair value, usd per share)	15.41	0	0
Forfeited (weighted average grant date fair value, usd per share)	12.33	17.11	15.95
Ending balance nonvested (weighted average grant date fair value, usd per share)	$ 16.32	$ 16.91	$ 17.69
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 5,277	$ 0	$ 0
Performance Stock Units | 2019 Grants
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Award requisite service period	3 years
Award vesting percentage	100%
Performance Stock Units | 2019 Grants | Minimum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Award vesting percentage	0%
Performance Stock Units | 2019 Grants | Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Award vesting percentage	200%
Performance Stock Units | 2020 Grants
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Award requisite service period	3 years
Performance Stock Units | 2020 Grants | Minimum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Award vesting percentage	0%
Performance Stock Units | 2020 Grants | Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Award vesting percentage	200%
Performance Stock Units | 2021 Grants
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Award requisite service period	3 years
Performance Stock Units | 2021 Grants | Minimum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Award vesting percentage	0%
Performance Stock Units | 2021 Grants | Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Award vesting percentage	200%
Performance Stock Units | 2022 Grants
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology
Expected dividend yield, Monte Carlo simulation	0%
Risk-free interest rate, Monte Carlo simulation	1.51%
Expected volatility rate, Monte Carlo simulation	44.51%
Expected term, Monte Carlo simulation	2 years 10 months 28 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Award requisite service period	3 years
Performance Stock Units | 2022 Grants | Minimum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Award vesting percentage	0%
Performance Stock Units | 2022 Grants | Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value
Award vesting percentage	200%
Performance Stock Units | 2020 Grants
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology
Estimated weighted average fair value of awards			24.11
Expected dividend yield, Monte Carlo simulation			0%
Risk-free interest rate, Monte Carlo simulation			1.56%
Expected volatility rate, Monte Carlo simulation			28.57%
Expected term, Monte Carlo simulation			2 years 11 months 12 days
Performance Stock Units | 2021 Grants
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology
Estimated weighted average fair value of awards	13.21
Expected dividend yield, Monte Carlo simulation	0%
Risk-free interest rate, Monte Carlo simulation	0.20%
Expected volatility rate, Monte Carlo simulation	41.70%
Expected term, Monte Carlo simulation	2 years 11 months 12 days
Performance Stock Units | 2022 Grants
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology
Estimated weighted average fair value of awards	8.82

Stock-Based Compensation - Tota

Stock-Based Compensation - Total Stock-Based Compensation Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award
Stock compensation expense	$ 20,632,000	$ 31,838,000	$ 17,194,000
Stock compensation expense, tax benefit	2,799,000	7,735,000	3,933,000
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award
Unrecognized stock-based compensation expense, other than options	0
Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award
Unrecognized stock-based compensation expense, other than options	0
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Unrecognized stock-based compensation expense, other than options	$ 13,966,000
Unrecognized stock-based compensation expense, period for recognition	1 year 2 months 26 days
Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award
Unrecognized stock-based compensation expense, other than options	$ 1,650,000
Unrecognized stock-based compensation expense, period for recognition	1 year 10 days
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Stock compensation expense	$ 0	$ 0	$ 0
Performance Shares | Exit event exceeding threshold
Share-based Compensation Arrangement by Share-based Payment Award
Award vesting percentage	100%

Earnings per Share - Reconcilia

Earnings per Share - Reconciliation from Basic to Diluted Weighted Average Shares Outstanding (Details) - shares	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Weighted average shares outstanding – Basic (shares)	125,962,111	132,622,105	138,035,764	137,684,773	136,256,601	136,129,591	136,095,060	136,006,082	133,601,322	136,167,384	135,528,977
Dilutive effect of unvested common shares and restricted stock units with service conditions, performance stock units considered probable of vesting and assumed stock option exercises and conversions (shares)									1,486,850	1,541,547	921,976
Weighted average shares outstanding – Diluted (shares)	127,538,343	134,096,839	139,149,560	138,749,065	137,528,028	137,354,427	136,095,060	136,006,082	135,088,172	137,708,931	136,450,953

Earnings per Share - Reconcil_2

Earnings per Share - Reconciliation of Net Income (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net income attributable to PQ Group Holdings Inc.	$ 25,252	$ 21,325	$ 19,245	$ 7,875	$ 25,435	$ (71,259)	$ (1,490)	$ (92,635)	$ 73,697	$ (139,949)	$ (278,771)
Denominator:
Weighted average shares outstanding – Basic (shares)	125,962,111	132,622,105	138,035,764	137,684,773	136,256,601	136,129,591	136,095,060	136,006,082	133,601,322	136,167,384	135,528,977
Weighted average shares outstanding – Diluted (shares)	127,538,343	134,096,839	139,149,560	138,749,065	137,528,028	137,354,427	136,095,060	136,006,082	135,088,172	137,708,931	136,450,953
Net income (loss) per share:
Basic income (loss) per share	$ 0.20	$ 0.16	$ 0.14	$ 0.06	$ 0.19	$ (0.52)	$ (0.01)	$ (0.68)	$ 0.55	$ (1.03)	$ (2.06)
Diluted income (loss) per share	0.20	0.16	0.14	0.06	0.18	(0.52)	(0.01)	(0.68)	0.55	(1.02)	(2.04)
Basic income per share—continuing operations	0.17	0.16	0.14	0.06	0.06	0.03	(0.06)	(0.02)	0.52	0.01	0.40
Diluted income per share—continuing operations	0.17	0.16	0.14	0.06	0.06	0.03	(0.06)	(0.02)	0.52	0.01	0.40
Basic income (loss) per share—discontinued operations	0.03	0	0	0	0.13	(0.56)	0.05	(0.66)	0.03	(1.04)	(2.46)
Diluted income (loss) per share—discontinued operations	$ 0.03	$ 0	$ 0	$ 0	$ 0.13	$ (0.55)	$ 0.05	$ (0.66)	$ 0.03	$ (1.03)	$ (2.44)

Earnings per Share - Anti-dilut

Earnings per Share - Anti-dilutive Shares (Details) - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restricted stock awards with performance only targets not yet achieved
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive shares	539,688	839,432	1,225,855
Stock options with performance only targets not yet achieved
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive shares	309,984	373,105	507,461
Anti-dilutive restricted stock awards, restricted stock units and performance stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive shares	20,497	6,214	1,453,120
Anti-dilutive stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share
Antidilutive shares	776,594	244,473	846,049

Commitments and Contingent Li_2

Commitments and Contingent Liabilities - Narratives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Loss Contingencies
Environmental loss contingency statement of financial position extensible enumeration not disclosed flag	Environmental Loss Contingency Statement Of Financial Position Extensible Enumeration Not Disclosed Flag	Environmental Loss Contingency Statement Of Financial Position Extensible Enumeration Not Disclosed Flag
Subsurface Remedial and Wetlands/Marsh Management
Loss Contingencies
Accrual for environmental loss contingencies	$ 306	$ 410
Subsurface Remediation and Soil Vapor Extraction
Loss Contingencies
Accrual for environmental loss contingencies	102	$ 306
ABL Facility
Loss Contingencies
Letters of credit outstanding	$ 4,043

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Corporate Joint Venture
Related Party Transaction
Related party receivable	$ 2,636	$ 2,943
Related party payable	0	0
Corporate Joint Venture | Operating Lease Rental Payments
Related Party Transaction
Related party sales	310	305	$ 295
Corporate Joint Venture | Sales from Partnership to Company
Related Party Transaction
Purchases from related party	0	0	0
Corporate Joint Venture | Manufacturing Costs
Related Party Transaction
Related party sales	23,699	19,976	16,869
Corporate Joint Venture | Services
Related Party Transaction
Related party sales	13,908	12,871	12,727
Corporate Joint Venture | Product Demonstration Costs
Related Party Transaction
Related party sales	1,621	2,204	1,768
INEOS Capital Partners
Related Party Transaction
Related party sales	$ 10,880	$ 3,923	$ 11,212

Quarterly Financial Summary (_3

Quarterly Financial Summary (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Quarterly Financial Information Disclosure [Abstract]
Sales	$ 182,740	$ 232,533	$ 225,172	$ 179,714	$ 170,197	$ 167,428	$ 146,952	$ 126,624	$ 820,159	$ 611,201	$ 495,920
Gross profit	49,367	67,669	59,859	47,735	54,425	53,644	38,473	30,119	224,630	176,661	150,953
Operating income	22,002	38,536	27,411	16,436	17,979	22,494	11,652	2,482	104,385	54,607	51,566
Net income from continuing operations	21,350	21,325	19,245	7,875	7,723	4,689	(7,870)	(2,748)	69,795	1,794	54,280
Net income (loss) from discontinued operations, net of tax	3,902	0	0	0	17,712	(75,872)	6,520	(89,770)	3,902	(141,410)	(335,984)
Net income	25,252	21,325	19,245	7,875	25,435	(71,183)	(1,350)	(92,518)	73,697	(139,616)	(281,704)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest					0	76	140	117	0	333	(2,933)
Net income attributable to PQ Group Holdings Inc.	$ 25,252	$ 21,325	$ 19,245	$ 7,875	$ 25,435	$ (71,259)	$ (1,490)	$ (92,635)	$ 73,697	$ (139,949)	$ (278,771)
Earnings per common share - basic:
Basic income per share—continuing operations	$ 0.17	$ 0.16	$ 0.14	$ 0.06	$ 0.06	$ 0.03	$ (0.06)	$ (0.02)	$ 0.52	$ 0.01	$ 0.40
Basic income (loss) per share—discontinued operations	0.03	0	0	0	0.13	(0.56)	0.05	(0.66)	0.03	(1.04)	(2.46)
Basic income (loss) per share	0.20	0.16	0.14	0.06	0.19	(0.52)	(0.01)	(0.68)	0.55	(1.03)	(2.06)
(Loss) Earnings per common share - diluted:
Diluted income per share—continuing operations	0.17	0.16	0.14	0.06	0.06	0.03	(0.06)	(0.02)	0.52	0.01	0.40
Diluted income (loss) per share—discontinued operations	0.03	0	0	0	0.13	(0.55)	0.05	(0.66)	0.03	(1.03)	(2.44)
Diluted income (loss) per share	$ 0.20	$ 0.16	$ 0.14	$ 0.06	$ 0.18	$ (0.52)	$ (0.01)	$ (0.68)	$ 0.55	$ (1.02)	$ (2.04)
Weighted average shares outstanding:
Basic (shares)	125,962,111	132,622,105	138,035,764	137,684,773	136,256,601	136,129,591	136,095,060	136,006,082	133,601,322	136,167,384	135,528,977
Diluted (shares)	127,538,343	134,096,839	139,149,560	138,749,065	137,528,028	137,354,427	136,095,060	136,006,082	135,088,172	137,708,931	136,450,953

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash paid during the year for:
Income taxes, net of refunds	$ 25,556	$ 11,843	$ 35,013
Interest	35,370	59,040	90,291
Non-cash investing activity:
Capital expenditures acquired on account but unpaid as of the year end	$ 4,653	6,116	16,245
Proceeds from Hedge, Investing Activities		$ 2,307	$ 4,963

Supplemental Cash Flow Inform_4

Supplemental Cash Flow Information - Cash and Restricted Cash Reconciliation (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash and Restricted Cash Reconciliation [Abstract]
Cash and cash equivalents	$ 110,920	$ 140,889	$ 113,377
Restricted cash included in prepaid and other current assets	0	0	1,640
Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows	$ 110,920	$ 140,889	$ 115,017
Restricted cash, balance sheet line item	Prepaid and other current assets	Prepaid and other current assets	Prepaid and other current assets

Schedule I - Condensed Statemen

Schedule I - Condensed Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Financial Statements, Captions
Stock compensation									$ 20,632	$ 31,838	$ 17,194
Net income attributable to PQ Group Holdings Inc.	$ 25,252	$ 21,325	$ 19,245	$ 7,875	$ 25,435	$ (71,259)	$ (1,490)	$ (92,635)	73,697	(139,949)	(278,771)
Other comprehensive income (loss), net of tax:
Comprehensive income attributable to PQ Group Holdings Inc.									85,481	(129,753)	(278,688)
Parent Company
Condensed Financial Statements, Captions
Stock compensation									20,632	39,523	25,200
Equity in net (income) loss from subsidiaries									(94,329)	100,426	253,571
Net income attributable to PQ Group Holdings Inc.									73,697	(139,949)	(278,771)
Other comprehensive income (loss), net of tax:
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)	(2,804)
Total other comprehensive income (loss)									11,784	10,196	83
Comprehensive income attributable to PQ Group Holdings Inc.									$ 85,481	$ (129,753)	$ (278,688)

Schedule I - Condensed Balance

Schedule I - Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
ASSETS
Total assets	$ 1,884,553	$ 1,931,219
LIABILITIES
Total liabilities	1,177,324	1,190,482
STOCKHOLDERS' EQUITY
Common stock	1,396	1,378
Preferred stock	0	0
Additional paid-in capital	1,091,475	1,073,409
Accumulated deficit	(242,010)	(315,707)
Treasury Stock, Value	(149,624)	(12,551)
Accumulated other comprehensive (loss) income	5,992	(5,792)
Total PQ Group Holdings Inc. equity	707,229	740,737
Total liabilities and equity	1,884,553	1,931,219
Parent Company
ASSETS
Investment in subsidiaries	707,229	740,737
Total assets	707,229	740,737
LIABILITIES
Total liabilities	0	0
STOCKHOLDERS' EQUITY
Common stock	1,396	1,378
Preferred stock	0	0
Additional paid-in capital	1,091,475	1,073,409
Accumulated deficit	(242,010)	(315,707)
Treasury Stock, Value	(149,624)	(12,551)
Accumulated other comprehensive (loss) income	5,992	(5,792)
Total PQ Group Holdings Inc. equity	707,229	740,737
Total liabilities and equity	$ 707,229	$ 740,737

Schedule I - Condensed Balanc_2

Schedule I - Condensed Balance Sheet Shares Data (Details) - $ / shares	Dec. 31, 2022	Dec. 31, 2021
Stockholders' Equity Attributable to Parent
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	450,000,000	450,000,000
Common stock, shares issued (shares)	139,571,272	137,820,971
Common stock, shares outstanding (shares)	122,186,238	136,938,758
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (shares)	50,000,000	50,000,000
Preferred stock, shares issued (shares)	0	0
Preferred stock, shares outstanding (shares)	0	0
Treasury stock (shares)	17,385,034	882,213
Parent Company
Stockholders' Equity Attributable to Parent
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	450,000,000	450,000,000
Common stock, shares issued (shares)	139,571,272	137,820,971
Common stock, shares outstanding (shares)	122,186,238	136,938,758
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (shares)	50,000,000	50,000,000
Preferred stock, shares issued (shares)	0	0
Preferred stock, shares outstanding (shares)	0	0
Treasury stock (shares)	17,385,034	882,213

Schedule I - Condensed Statem_2

Schedule I - Condensed Statement of Cash Flow (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income (loss)	$ 25,252	$ 21,325	$ 19,245	$ 7,875	$ 25,435	$ (71,259)	$ (1,490)	$ (92,635)	$ 73,697	$ (139,949)	$ (278,771)
Adjustments to reconcile net income to net cash provided by operating activities:
Stock compensation									20,632	31,838	17,194
Net cash provided by operating activities									186,606	129,918	223,598
Cash flows from investing activities:
Dividends received from affiliated companies									35,000	35,000	40,000
Net cash (used in) provided by investing activities									(63,021)	835,732	551,472
Cash flows from financing activities:
Net cash (used in) provided by financing activities									(148,186)	(964,233)	(722,820)
Net change in cash, cash equivalents and restricted cash									(29,969)	3,670	63,302
Cash, cash equivalents and restricted cash at beginning of period				140,889				113,377	140,889	113,377
Cash, cash equivalents and restricted cash at end of period	110,920				140,889				110,920	140,889	113,377
Parent Company
Cash flows from operating activities:
Net income (loss)									73,697	(139,949)	(278,771)
Equity in net income from subsidiaries									(94,329)	100,426	253,571
Adjustments to reconcile net income to net cash provided by operating activities:
Stock compensation									20,632	39,523	25,200
Net cash provided by operating activities									0	0	0
Cash flows from investing activities:
Dividends received from affiliated companies									0	435,593	243,749
Net cash (used in) provided by investing activities									0	435,593	243,749
Cash flows from financing activities:
Dividends paid to stockholders									0	435,593	243,749
Net cash (used in) provided by financing activities									0	(435,593)	(243,749)
Effect of exchange rate changes on cash, cash equivalents and restricted cash									0	0	0
Net change in cash, cash equivalents and restricted cash									0	0	0
Cash, cash equivalents and restricted cash at beginning of period				$ 0				$ 0	0	0
Cash, cash equivalents and restricted cash at end of period	$ 0				$ 0				$ 0	$ 0	$ 0