RESTRUCTURING COSTS (Details) - USD ($) $ in Thousands	12 Months Ended	36 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 13,166	$ 5,038	$ 4,239	$ 22,443
Severance and related charges
Restructuring Cost and Reserve [Line Items]
Restructuring expense	9,632	3,042	$ 4,239	16,913
Facility relocation and closure charges
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 3,534	$ 1,996		$ 5,530

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration