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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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