Goodwill and Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands |
12 Months Ended | |
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Dec. 31, 2019 |
Dec. 31, 2018 |
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| Schedule of Goodwill And Intangible Assets [Line Items] | ||
| Goodwill impairment | $ 0 | $ 135,776 |
| Corporate and other | ||
| Schedule of Goodwill And Intangible Assets [Line Items] | ||
| Goodwill impairment | 0 | 0 |
| Accumulated goodwill impairment losses | 55,700 | |
| GCI Holdings | ||
| Schedule of Goodwill And Intangible Assets [Line Items] | ||
| Goodwill impairment | 135,800 | |
| Accumulated goodwill impairment losses | 135,800 | |
| GCI Holdings | Wireless License | ||
| Schedule of Goodwill And Intangible Assets [Line Items] | ||
| Impairment loss on indefinite-lived intangibles | $ 157,000 | |
| GCI Holdings | Cable certificates | ||
| Schedule of Goodwill And Intangible Assets [Line Items] | ||
| Impairment loss on indefinite-lived intangibles | $ 65,000 | |
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- Definition [Line Items] for Schedule of Goodwill And Intangible Assets [Table] No definition available.
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- Definition Amount of accumulated impairment loss for 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 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 Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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