Quarterly report pursuant to Section 13 or 15(d)

Debt (Details)

v3.4.0.3
Debt (Details)
 1 Months Ended 3 Months Ended 4 Months Ended
Mar. 31, 2016
USD ($)
Mar. 21, 2016
USD ($)
item
Apr. 07, 2015
USD ($)
Oct. 31, 2014
USD ($)
Oct. 30, 2014
USD ($)
item
Jul. 31, 2015
USD ($)
Nov. 30, 2014
USD ($)
Mar. 31, 2016
USD ($)
shares
Mar. 31, 2015
USD ($)
Jul. 31, 2015
Dec. 31, 2015
USD ($)
Mar. 27, 2015
USD ($)
Debt disclosures                        
Debt outstanding $ 597,729,000             $ 597,729,000     $ 399,703,000  
Distribution to parent       $ 300,000,000                
Repayments of debt                 $ 30,158,000      
Margin Loan Agreements | Charter                        
Debt disclosures                        
Number of common shares pledged as collateral | shares               8,200,000        
Value of pledged collateral 1,700,000,000             $ 1,700,000,000        
Margin Loan Agreements | Time Warner                        
Debt disclosures                        
Number of common shares pledged as collateral | shares               2,400,000        
Value of pledged collateral 483,900,000             $ 483,900,000        
Revolving Credit Facility                        
Debt disclosures                        
Maximum borrowing capacity                       $ 234,000,000
Interest rate basis                   three-month LIBOR    
Basis spread on variable rate                   0.64%    
Proceeds from Issuance of Debt     $ 40,000,000                  
Debt Instrument, Unused Borrowing Capacity Fee, Percent           0.12%       0.12%    
Repayments of debt           $ 40,000,000            
BroadbandSPV | Margin Loan Agreements                        
Debt disclosures                        
Long-term Debt, Gross 400,000,000             400,000,000        
Remaining borrowing capacity $ 0             $ 0        
Interest rate basis               three-month LIBOR        
Basis spread on variable rate               1.55%        
Debt Instrument, Interest Rate, Effective Percentage 2.16%             2.16%        
BroadbandSPV | Margin Loan Agreements                        
Debt disclosures                        
Number of debt agreement | item         2              
Maximum borrowing capacity         $ 400,000,000              
Proceeds From Issuance Of Secured Debt       $ 320,000,000     $ 52,000,000          
Cheetah 5                        
Debt disclosures                        
Maximum borrowing capacity $ 100,000,000             $ 100,000,000        
Cheetah 5 | Margin Loan Agreements                        
Debt disclosures                        
Number of debt agreement | item   2                    
Maximum borrowing capacity   $ 300,000,000                    
Long-term Debt, Gross 200,000,000             200,000,000        
Remaining borrowing capacity $ 100,000,000             $ 100,000,000        
Interest rate basis LIBOR                      
Basis spread on variable rate 2.10%                      
Debt Instrument, Interest Rate, Effective Percentage 2.50%             2.50%        
Cheetah 5 | Margin Loan Agreements | Term loan                        
Debt disclosures                        
Maximum borrowing capacity   $ 200,000,000                    
Cheetah 5 | Margin Loan Agreements | Draw loan                        
Debt disclosures                        
Maximum borrowing capacity $ 100,000,000             $ 100,000,000