BUSINESS COMBINATION - Identifiable Intangible Assets Acquired (Details) - KMG $ in Thousands	Nov. 15, 2018 USD ($)
Fair Value
Intangible assets	$ 844,800
Trade name - Flowchem
Acquired Indefinite-lived Intangible Assets [Line Items]
Fair value, indefinite lived intangible assets	46,000
Customer relationships - Flowchem
Fair Value
Fair value, finite lived intangible assets	$ 315,000
Estimated useful live, finite lived intangible asset	20 years
Customer relationships - Electronic chemicals
Fair Value
Fair value, finite lived intangible assets	$ 280,000
Estimated useful live, finite lived intangible asset	19 years
Customer relationships - all other
Fair Value
Fair value, finite lived intangible assets	$ 109,000
Customer relationships - all other \| Minimum
Fair Value
Estimated useful live, finite lived intangible asset	15 years
Customer relationships - all other \| Maximum
Fair Value
Estimated useful live, finite lived intangible asset	16 years
Technology and know-how
Fair Value
Fair value, finite lived intangible assets	$ 85,500
Technology and know-how \| Minimum
Fair Value
Estimated useful live, finite lived intangible asset	9 years
Technology and know-how \| Maximum
Fair Value
Estimated useful live, finite lived intangible asset	11 years
Trade name - all other
Fair Value
Fair value, finite lived intangible assets	$ 7,000
Trade name - all other \| Minimum
Fair Value
Estimated useful live, finite lived intangible asset	1 year
Trade name - all other \| Maximum
Fair Value
Estimated useful live, finite lived intangible asset	15 years
EPA product registration rights
Fair Value
Fair value, finite lived intangible assets	$ 2,300
Estimated useful live, finite lived intangible asset	15 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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