Quarterly report pursuant to Section 13 or 15(d)

Revenue (Disaggregation of Revenue) (Details)

v3.10.0.1
Revenue (Disaggregation of Revenue) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Disaggregation of Revenue [Line Items]        
Total $ 210,146 $ 5,493 $ 504,840 $ 15,639
Lease, grant, and revenue from subsidies        
Disaggregation of Revenue [Line Items]        
Total 24,226   55,114  
GCI Holdings | Consumer Revenue | Wireless        
Disaggregation of Revenue [Line Items]        
Revenues 25,584   62,312  
GCI Holdings | Consumer Revenue | Data        
Disaggregation of Revenue [Line Items]        
Revenues 39,652   88,921  
GCI Holdings | Consumer Revenue | Video        
Disaggregation of Revenue [Line Items]        
Revenues 22,272   50,180  
GCI Holdings | Consumer Revenue | Voice        
Disaggregation of Revenue [Line Items]        
Revenues 4,368   10,246  
GCI Holdings | Business Revenue | Wireless        
Disaggregation of Revenue [Line Items]        
Revenues 18,071   44,889  
GCI Holdings | Business Revenue | Data        
Disaggregation of Revenue [Line Items]        
Revenues 59,585   154,239  
GCI Holdings | Business Revenue | Video        
Disaggregation of Revenue [Line Items]        
Revenues 4,927   9,436  
GCI Holdings | Business Revenue | Voice        
Disaggregation of Revenue [Line Items]        
Revenues 6,361   14,282  
Evite        
Disaggregation of Revenue [Line Items]        
Revenues $ 5,100   $ 15,221