BUSINESS DESCRIPTION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Goodwill, beginning of period		$ 529,463	$ 523,998
Goodwill as a result of Zumbro Acquisition			432
Goodwill impairment	$ (1,228)		(1,228)
Impact due to change in foreign exchange rates		(5,514)	6,261
Goodwill, end of period		523,949	529,463
HNH
Goodwill [Roll Forward]
Goodwill, beginning of period		424,051
Goodwill, end of period		424,044	424,051
ANH
Goodwill [Roll Forward]
Goodwill, beginning of period		17,824
Goodwill, end of period		17,207	17,824
Specialty Products
Goodwill [Roll Forward]
Goodwill, beginning of period		87,539
Goodwill, end of period		82,654	87,539
Other and Unallocated
Goodwill [Roll Forward]
Goodwill, beginning of period		49
Goodwill, end of period		$ 44	$ 49

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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