Goodwill and Intangible Assets (Narrative) (Details) $ in Thousands |
12 Months Ended |
|---|---|
|
Dec. 31, 2018
USD ($)
| |
| Schedule of Goodwill And Intangible Assets [Line Items] | |
| Goodwill impairment | $ 135,776 |
| Corporate and other | |
| Schedule of Goodwill And Intangible Assets [Line Items] | |
| Goodwill impairment | 0 |
| Accumulated goodwill impairment losses | 56,000 |
| GCI Holdings | |
| Schedule of Goodwill And Intangible Assets [Line Items] | |
| Goodwill impairment | 136,000 |
| Accumulated goodwill impairment losses | 136,000 |
| GCI Holdings | Cable certificates | |
| Schedule of Goodwill And Intangible Assets [Line Items] | |
| Impairment loss on indefinite-lived intangibles | $ 65,000 |
| X | ||||||||||
- Definition [Line Items] for Schedule of Goodwill And Intangible Assets [Table] No definition available.
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|