Acquisition (Pro Forma Revenue and Net Earnings) (Details) - HoldCo - GCI Liberty Inc - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | ||
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Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
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| Business Acquisition [Line Items] | ||||
| Revenue | $ 220,737 | $ 227,860 | $ 664,287 | $ 685,911 |
| Net earnings (loss) | 327,046 | 277,315 | (157,678) | 722,803 |
| Net earnings (loss) attributable to GCI Liberty shareholders | $ 327,173 | $ 277,505 | $ (157,242) | $ 723,229 |
| Basic net earnings (loss) attributable to Series A and Series B GCI Liberty, Inc. shareholders per common share (in dollars per share) | $ 3.04 | $ 2.55 | $ (1.46) | $ 6.63 |
| Diluted net earnings (loss) attributable to Series A and Series B GCI Liberty, Inc. shareholders per common share (in dollars per share) | $ 3.00 | $ 2.55 | $ (1.46) | $ 6.63 |
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- Definition Business Acquisition, Pro Forma Net Income (Loss) Attributable To Common Shareholders No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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