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Discontinued Operations and Dispositions B2B Backup and Voice Asset Sales (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
(Loss) gain on sale of businesses |  | $ (21,798) | $ 17,122 | $ 0
Goodwill impairment on business |  | 32,629 | $ 0 | $ 0
Disposal Group, Held-for-sale, Not Discontinued Operations | B2B Backup Business |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Goodwill impairment on business | $ 32,600 |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Gain (loss) on disposal |  | 17,100 |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Voice Assets |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
(Loss) gain on sale of businesses |  | 2,800 |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | B2B Backup Business |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
(Loss) gain on sale of businesses |  | (24,600) |  |
Goodwill impairment on business |  | $ 32,600 |  |

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