Quarterly report pursuant to Section 13 or 15(d)

Related Party Transactions - Schedule of Related Party Revenue and Investment Income (Parenthetical) (Details)

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Related Party Transactions - Schedule of Related Party Revenue and Investment Income (Parenthetical) (Details) - Sirius XM Canada [Member] - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Related Party Transaction [Line Items]          
Amortization related to equity method intangible assets       $ 363  
Off balance sheet equity method loss $ 3,439   $ 3,439    
Investment balance, carrying value 0   0   $ 2,654
Dividend received from unconsolidated entity investment $ 3,891 $ 4,591 $ 11,881 $ 39,046