Quarterly report pursuant to Section 13 or 15(d)

Revenue (Disaggregation of Revenue) (Details)

v3.8.0.1
Revenue (Disaggregation of Revenue) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Disaggregation of Revenue [Line Items]    
Total $ 61,204 $ 3,969
Lease, grant, and revenue from subsidies    
Disaggregation of Revenue [Line Items]    
Total 5,567  
GCI Holdings | Consumer Revenue | Wireless    
Disaggregation of Revenue [Line Items]    
Revenues 7,762  
GCI Holdings | Consumer Revenue | Data    
Disaggregation of Revenue [Line Items]    
Revenues 10,026  
GCI Holdings | Consumer Revenue | Video    
Disaggregation of Revenue [Line Items]    
Revenues 5,762  
GCI Holdings | Consumer Revenue | Voice    
Disaggregation of Revenue [Line Items]    
Revenues 1,168  
GCI Holdings | Business Revenue | Wireless    
Disaggregation of Revenue [Line Items]    
Revenues 5,427  
GCI Holdings | Business Revenue | Data    
Disaggregation of Revenue [Line Items]    
Revenues 18,431  
GCI Holdings | Business Revenue | Video    
Disaggregation of Revenue [Line Items]    
Revenues 1,022  
GCI Holdings | Business Revenue | Voice    
Disaggregation of Revenue [Line Items]    
Revenues 1,627  
Evite    
Disaggregation of Revenue [Line Items]    
Revenues $ 4,412