Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Summary of Assets and Liabilities Measured at Fair Value (Parenthetical) (Details)

v3.3.0.814
Summary of Significant Accounting Policies - Summary of Assets and Liabilities Measured at Fair Value (Parenthetical) (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Sirius XM Canada [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Investment balance, carrying value $ 0 $ 2,654