Quarterly report pursuant to Section 13 or 15(d)

Investments in Affiliates Accounted for Using the Equity Method - (Summary of Financial Information) (Details)

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Investments in Affiliates Accounted for Using the Equity Method - (Summary of Financial Information) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]          
Investment in affiliates $ 168,839   $ 168,839   $ 177,030
Realized and unrealized gains (losses) on financial instruments, net 156,165 $ 495,509 1,844,863 $ (4,328)  
Liberty Broadband          
Schedule of Equity Method Investments [Line Items]          
Current assets 94,951   94,951   84,574
Other assets 9,767   9,767   9,487
Total assets 12,172,047   12,172,047   12,098,437
Long-term debt 572,619   572,619   522,928
Deferred income tax liabilities 972,005   972,005   965,829
Other liabilities 15,251   15,251   11,062
Equity 10,612,172   10,612,172   10,598,618
Total liabilities and shareholders' equity 12,172,047   12,172,047   12,098,437
Revenue 3,713 3,518 10,918 18,680  
Operating expenses, net (11,301) (7,614) (31,873) (25,601)  
Operating income (loss) (7,588) (4,096) (20,955) (6,921)  
Share of earnings (losses) of affiliates 61,633 84,739 141,882 126,952  
Gain (loss) on dilution of investment in affiliate (11,219) (3,203) (68,944) (35,165)  
Realized and unrealized gains (losses) on financial instruments, net (433) 5,678 (433) 3,659  
Other income (expense), net (5,773) (5,717) (17,829) (16,371)  
Income tax benefit (expense) (9,124) (17,762) (8,474) (17,005)  
Net earnings (loss) 27,496 $ 59,639 25,247 $ 55,149  
Liberty Broadband | Charter          
Schedule of Equity Method Investments [Line Items]          
Investment in affiliates $ 12,067,329   $ 12,067,329   $ 12,004,376