Quarterly report pursuant to Section 13 or 15(d)

Earnings per Share - Earnings per Share (Details)

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Earnings per Share - Earnings per Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Numerator:    
Net income available to common stockholders for basic and diluted net income per common share $ 105,692us-gaap_NetIncomeLoss $ 93,988us-gaap_NetIncomeLoss
Denominator:    
Weighted average common shares outstanding for basic net income per common share 5,570,748us-gaap_WeightedAverageNumberOfSharesOutstandingBasic [1] 6,094,784us-gaap_WeightedAverageNumberOfSharesOutstandingBasic [1]
Weighted average impact of dilutive equity instruments 69,090siri_IncrementalCommonSharesAttributableToDilutiveEquityInstruments 79,064siri_IncrementalCommonSharesAttributableToDilutiveEquityInstruments
Weighted average shares for diluted net income per common share 5,639,838us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 6,173,848us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Net income per common share:    
Basic $ 0.02us-gaap_EarningsPerShareBasic $ 0.02us-gaap_EarningsPerShareBasic
Diluted $ 0.02us-gaap_EarningsPerShareDiluted $ 0.02us-gaap_EarningsPerShareDiluted
[1] During the three months ended March 31, 2014, 272,856 shares of common stock were reserved for conversion in connection with the 7% Exchangeable Senior Subordinated Notes due 2014 (the “Exchangeable Notes”) and were considered to be anti-dilutive in our calculation of diluted net income per share. The Exchangeable Notes were fully converted into shares of our common stock as of December 1, 2014.