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Discontinued Operations - Narrative (Details) - USD ($) |  | 3 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 26, 2020 | Mar. 31, 2021 | Feb. 01, 2021 | Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Current liabilities |  | $ 1,202,317,000 |  | $ 1,208,061,000
Wireless Segment |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Accounts receivable |  | 49,400,000 |  | 51,700,000
Current liabilities |  | 4,900,000 |  | $ 6,100,000
Discontinued Operations, Held-for-sale |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Sale proceeds |  |  | $ 1,950,000,000 |
Minimum |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Accelerated expenses |  | 0 |  |
Maximum |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Accelerated expenses |  | $ 36,000,000 |  |
Affiliated Entity |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Value of business percentage | 90.00% |  |  |

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