Quarterly report pursuant to Section 13 or 15(d)

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

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Summary of Significant Accounting Policies - Summary of Assets and Liabilities Measured at Fair Value (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Liabilities:    
Debt $ 5,945,992 $ 5,649,173
Level 1    
Liabilities:    
Debt 0 0
Level 2    
Liabilities:    
Debt 5,945,992 5,649,173
Level 3    
Liabilities:    
Debt 0 0
Sirius XM Canada    
Assets:    
Sirius XM Canada Holdings Inc. (“Sirius XM Canada”) - investment 168,863 141,850
Liabilities:    
Investment balance, carrying value 6,386 0
Sirius XM Canada | Level 1    
Assets:    
Sirius XM Canada Holdings Inc. (“Sirius XM Canada”) - investment 168,863 141,850
Sirius XM Canada | Level 2    
Assets:    
Sirius XM Canada Holdings Inc. (“Sirius XM Canada”) - investment 0 0
Sirius XM Canada | Level 3    
Assets:    
Sirius XM Canada Holdings Inc. (“Sirius XM Canada”) - investment $ 0 $ 0