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BUSINESS ACQUISITONS - PENDING MERGER (Details) - USD ($) shares in Thousands, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Nov. 14, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Business Acquisition [Line Items] |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired |  | $ 0 | $ 46,389 | $ 42,951
Eclipse Communications Ltd. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Shares issued to selling shareholders (in shares) | 32,500 |  |  |
Payments to Acquire Businesses, Net of Cash Acquired | $ 324,000 |  |  |
Eclipse Communications Ltd. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Proceeds from Sale of Real Estate | $ 31,000 |  |  |

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