Goodwill and Intangible Assets - Rollforward (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Goodwill [Roll Forward] | ||
| Balance at the beginning of the period | $ 6,497 | $ 6,497 |
| Acquisitions | 739,080 | 0 |
| Balance at the end of the period | 745,577 | 6,497 |
| Goodwill impairment loss | 39,100 | |
| GCI Holdings | ||
| Goodwill [Roll Forward] | ||
| Acquisitions | 739,080 | |
| Balance at the end of the period | 739,080 | |
| Skyhook | ||
| Goodwill [Roll Forward] | ||
| Balance at the beginning of the period | 6,497 | 6,497 |
| Balance at the end of the period | $ 6,497 | $ 6,497 |
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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