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BUSINESS ACQUISITIONS - ECI Narrative (Details) - USD ($) shares in Millions |  | 3 Months Ended
--- | --- | ---
Nov. 14, 2019 | Mar. 31, 2020 | Mar. 31, 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 |  | 30,000,000 |
Net loss |  | 3,300,000 |
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 |
Indemnification receivable |  | $ 5,700,000 |
Weighted average useful life of intangible assets (in years) | 12 years 5 months 8 days |  |

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477 + Details
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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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