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 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Disaggregation of Revenue [Line Items]        
Total $ 233,490 $ 6,177 $ 294,694 $ 10,146
Lease, grant, and revenue from subsidies        
Disaggregation of Revenue [Line Items]        
Total 25,321   30,888  
GCI Holdings | Consumer Revenue | Wireless        
Disaggregation of Revenue [Line Items]        
Revenues 28,966   36,728  
GCI Holdings | Consumer Revenue | Data        
Disaggregation of Revenue [Line Items]        
Revenues 39,243   49,269  
GCI Holdings | Consumer Revenue | Video        
Disaggregation of Revenue [Line Items]        
Revenues 22,146   27,908  
GCI Holdings | Consumer Revenue | Voice        
Disaggregation of Revenue [Line Items]        
Revenues 4,710   5,878  
GCI Holdings | Business Revenue | Wireless        
Disaggregation of Revenue [Line Items]        
Revenues 21,391   26,818  
GCI Holdings | Business Revenue | Data        
Disaggregation of Revenue [Line Items]        
Revenues 76,223   94,654  
GCI Holdings | Business Revenue | Video        
Disaggregation of Revenue [Line Items]        
Revenues 3,487   4,509  
GCI Holdings | Business Revenue | Voice        
Disaggregation of Revenue [Line Items]        
Revenues 6,294   7,921  
Evite        
Disaggregation of Revenue [Line Items]        
Revenues $ 5,709   $ 10,121