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Discontinued Operations and Dispositions B2B Backup and Voice Asset Sales (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Loss on sale of businesses | $ 0 | $ 0 | $ (21,798)
Goodwill impairment on business | $ 56,850 | $ 27,369 | 32,629
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 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 on sale of businesses |  |  | (24,600)
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

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