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 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]          
Investments accounted for using the equity method $ 169,795   $ 169,795   $ 177,030
Realized and unrealized gains (losses) on financial instruments, net 679,098 $ (428,356) 1,688,698 $ (499,837)  
Liberty Broadband          
Schedule of Equity Method Investments [Line Items]          
Current assets 74,315   74,315   84,574
Other assets 9,112   9,112   9,487
Total assets 12,107,169   12,107,169   12,098,437
Long-term debt 523,549   523,549   522,928
Deferred income tax liabilities 964,584   964,584   965,829
Other liabilities 31,976   31,976   11,062
Equity 10,587,060   10,587,060   10,598,618
Total liabilities and shareholders' equity 12,107,169   12,107,169   12,098,437
Revenue 3,747 3,371 7,205 15,162  
Operating expenses, net (10,913) (8,442) (20,572) (17,987)  
Operating income (loss) (7,166) (5,071) (13,367) (2,825)  
Share of earnings (losses) of affiliates 45,400 32,911 80,249 42,213  
Gain (loss) on dilution of investment in affiliate (16,322) (5,205) (57,725) (31,962)  
Realized and unrealized gains (losses) on financial instruments, net 0 (2,019) 0 (2,019)  
Other income (expense), net (5,936) (5,842) (12,056) (10,654)  
Income tax benefit (expense) (3,924) (4,194) 650 757  
Net earnings (loss) 12,052 $ 10,580 (2,249) $ (4,490)  
Liberty Broadband | Charter          
Schedule of Equity Method Investments [Line Items]          
Investments accounted for using the equity method $ 12,023,742   $ 12,023,742   $ 12,004,376