Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions - Summary of Related Party Balances (Details)

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Related Party Transactions - Summary of Related Party Balances (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Related Party Transaction [Line Items]    
Related party current assets $ 12,877 $ 10,284
Related party long-term assets 977,795 962,080
Related party current liabilities 3,923 2,839
Related party long-term liabilities 6,742 7,364
Equity Method Investee | Sirius XM Canada    
Related Party Transaction [Line Items]    
Related party current assets 12,877 10,284
Related party long-term assets 465,948 481,608
Related party current liabilities 3,923 2,839
Related party long-term liabilities $ 6,742 $ 7,364