Annual report pursuant to Section 13 and 15(d)

Investments in Affiliates Accounted for Using the Equity Method - Excess Basis Allocation (Details)

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Investments in Affiliates Accounted for Using the Equity Method - Excess Basis Allocation (Details) - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Excess basis allocation within memo accounts      
Share of earnings (loss) of affiliates, net $ 713,329 $ 286,401 $ 166,146
Loss on dilution of investment in affiliate (183,575) (79,329) (43,575)
Charter      
Investments in affiliates accounted for using the Equity Method      
Other Comprehensive Income Loss From Equity Method Investments 0 380 (172)
Other Comprehensive Income Loss From Equity Method Investments Before Tax 0 500 (200)
Excess basis allocation within memo accounts      
Property and equipment 733,000 225,000  
Customer relationships 2,726,000 1,043,000  
Franchise fees 3,693,000 1,996,000  
Trademarks 29,000 29,000  
Goodwill 3,934,000 1,630,000  
Debt (602,000) (9,000)  
Deferred income tax liability (1,641,000) (817,000)  
Total 8,872,000 4,097,000  
Share of earnings (loss) of affiliates, net 713,000 286,000 166,000
Amortization of Deferred Charges 144,000 124,000 119,000
Loss on dilution of investment in affiliate $ (184,000) $ (79,000) $ (44,000)
Charter | Series A common stock      
Excess basis allocation within memo accounts      
Exercise of preemptive right to purchase Charter shares 35    
Exercise of preemptive right to purchase Charter shares $ 14,900    
Charter | Customer relationships      
Excess basis allocation within memo accounts      
Remaining useful lives of customer relationships 10 years    
Charter | Property, Plant and Equipment      
Excess basis allocation within memo accounts      
Remaining useful lives of property and equipment 6 years