Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details)

v3.19.3.a.u2
Stockholders' Equity (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Sep. 30, 2019
USD ($)
shares
Oct. 03, 2017
USD ($)
shares
Mar. 31, 2017
USD ($)
May 18, 2016
USD ($)
$ / shares
shares
Jan. 09, 2015
shares
Dec. 10, 2014
Nov. 04, 2014
shares
Oct. 29, 2014
Dec. 31, 2017
$ / item
shares
Dec. 31, 2019
USD ($)
Vote
item
$ / shares
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / item
Dec. 31, 2016
USD ($)
shares
Broadband Spin-Off Distribution Ratio               0.25          
Shares issued during period             85,761,332            
Proceeds from Derivative Instrument, Financing Activities | $                   $ 47,500 $ 146,483 $ 155,683  
Preferred shares issued                   0 0    
Liberty Interactive                          
Number of shares purchased       42,700,000                  
GCI Liberty, Inc.                          
Non-voting economic ownership percentage                   23.50%      
Series A common stock                          
Common Stock, Par or Stated Value Per Share | $ / shares                   $ 0.01 $ 0.01    
Number Of Votes | Vote                   1      
Common Stock, Capital Shares Reserved for Future Issuance                   4,000      
Series B common stock                          
Common Stock, Par or Stated Value Per Share | $ / shares                   $ 0.01 0.01    
Number Of Votes | Vote                   10      
Common Stock Shares Received In Exchange For One Share Of Series B | item                   1      
Series C common stock                          
Subscription Rights Distribution Ratio           0.20              
Proceeds from Issuance of Common Stock | $       $ 4,400,000                  
Shares issued during period       78,300,000 17,277,224                
Common Stock, Par or Stated Value Per Share | $ / shares       $ 0.01           $ 0.01 $ 0.01    
Purchase price (in dollars per share) | $ / shares       $ 56.23                  
Number Of Votes | Vote                   0      
Common Stock, Capital Shares Reserved for Future Issuance                   1,900,000      
Series C common stock | Zero-strike call option                          
Number of shares purchased                 527,156        
Derivative underlying share amount 460,675 527,156               0 0   704,908
Derivative, Price Risk Option Strike Price | $ / item                 90.54     90.54  
Derivative premium paid | $ $ 46,300 $ 47,700                     $ 47,900
Proceeds from Derivative Instrument, Financing Activities | $     $ 50,000             $ 47,500