Quarterly report pursuant to Section 13 or 15(d)

Business & Basis of Presentation (Details)

v2.4.0.8
Business & Basis of Presentation (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2013
Line
Sep. 30, 2013
Minimum [Member]
Sep. 30, 2013
Maximum [Member]
Aug. 14, 2013
Agero, Inc. [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]        
Number of satellite radio systems 2      
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Length of prepaid subscriptions, term   3 months 12 months  
Estimated purchase price to acquire business       $ 530,000