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BUSINESS ACQUISITIONS - ECI Narrative (Details) - USD ($) shares in Millions		3 Months Ended		9 Months Ended
	Nov. 14, 2019	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Business Acquisition [Line Items]
Net cash consideration				$ 346,852,000	$ 0
Term Loan Facility
Business Acquisition [Line Items]
Commitments from lender	$ 400,000,000
Revolving Credit Facility
Business Acquisition [Line Items]
Commitments from lender	100,000,000
ECI
Business Acquisition [Line Items]
Proceeds from sale of real estate assets	$ 33,400,000
Revenue		$ 77,600,000		171,100,000
Net loss		$ 11,200,000		31,900,000
ECI
Business Acquisition [Line Items]
Common stock to be issued (in shares)	32.5
Fair value of ribbon stock issued	$ 108,600,000			108,550,000
Net cash consideration	322,500,000			346,852,000
Repayment of ECI outstanding debt obligations	183,300,000			183,266,000
Payment to selling shareholders	$ 139,200,000			$ 139,244,000
Reduction to current inventory			$ (10,400,000)
Reduction to noncurrent inventory			(7,000,000.0)
Increase to identifiable intangible assets			11,000,000.0
Net increase to goodwill			2,500,000
Indemnification receivable			5,700,000
Weighted average useful life of intangible assets (in years)	12 years 4 months 17 days
ECI | In-process research and development
Business Acquisition [Line Items]
Increase to identifiable intangible assets			3,000,000.0
ECI | Developed technology
Business Acquisition [Line Items]
Increase to identifiable intangible assets			5,000,000.0
ECI | Customer relationships
Business Acquisition [Line Items]
Increase to identifiable intangible assets			2,000,000.0
ECI | Trade names
Business Acquisition [Line Items]
Increase to identifiable intangible assets			$ 1,000,000.0

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