Ecovyst, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
- Schedule I - Condensed Financial Information of Parent (Policies)
Notes Tables
Notes Details

Fair Value Measurements - Assets Measured at Fair Value on a Non-recurring Basis (Details)

v3.10.0.1

Fair Value Measurements - Assets Measured at Fair Value on a Non-recurring Basis (Details) - USD ($) $ in Thousands		12 Months Ended
	Oct. 01, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Intangible asset impairment charge		$ 0	$ 0	$ 6,873
Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Indefinite-lived trade names	$ 153,922
Indefinite-lived intangible assets, gross	160,795
Intangible asset impairment charge	$ 6,873
Estimate of Fair Value Measurement \| Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Indefinite-lived trade names				153,922
Estimate of Fair Value Measurement \| Nonrecurring \| Quoted Prices in Active Markets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Indefinite-lived trade names				0
Estimate of Fair Value Measurement \| Nonrecurring \| Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Indefinite-lived trade names				0
Estimate of Fair Value Measurement \| Nonrecurring \| Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Indefinite-lived trade names				153,922
Change Measurement During Period \| Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Indefinite-lived trade names				$ (6,873)

- Definition

Indefinite-Lived Intangible Assets (Excluding Goodwill), Gross

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- Definition

Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (b)
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Section 45
-Paragraph 28
-Subparagraph (b)
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- Definition

Fair value portion of assets, excluding financial assets and goodwill, that lack physical substance, having a projected indefinite period of benefit.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
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