Annual report pursuant to Section 13 and 15(d)

Acquisition (Narrative) (Details)

v3.10.0.1
Acquisition (Narrative) (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Mar. 09, 2018
Dec. 31, 2018
Dec. 31, 2018
GCI Liberty Inc      
Business Acquisition [Line Items]      
Net earnings (loss) from continuing operations     $ 307,900
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    
Decrease in receivables   $ (13,700)  
Increase in property and equipment   16,300  
Increase in intangible assets not subject to amortization   9,500  
Decrease to intangible assets subject to amortization   (75,200)  
Increase in deferred revenue   15,600  
Decrease in other liabilities   21,400  
Decrease in deferred income tax liabilities   15,600  
Increase in goodwill   $ 41,400  
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