Quarterly report pursuant to Section 13 or 15(d)

Acquisition (Narrative) (Details)

v3.19.1
Acquisition (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 09, 2018
Mar. 31, 2018
GCI Liberty Inc    
Business Acquisition [Line Items]    
Net earnings (loss) from continuing operations   $ 1,500
GCI Liberty Inc | HoldCo    
Business Acquisition [Line Items]    
Acquisition price $ 1,100,000  
Intangible assets subject to amortization 468,737  
Acquired goodwill deductible for income tax purposes $ 170,000  
GCI Liberty Inc | HoldCo | Tradename    
Business Acquisition [Line Items]    
Estimated useful life 10 years  
GCI Liberty Inc | HoldCo | Customer relationships    
Business Acquisition [Line Items]    
Weighted average useful life 16 years  
GCI Liberty Inc | HoldCo | Right-to-use    
Business Acquisition [Line Items]    
Weighted average useful life 8 years