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Benefit Plans (Details Textual) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2013
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Jun. 30, 2012
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Jun. 30, 2013
plans
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Jun. 30, 2012
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Jun. 30, 2013
Third Parties [Member]
|
Jun. 30, 2012
Third Parties [Member]
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Jun. 30, 2013
Third Parties [Member]
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Jun. 30, 2012
Third Parties [Member]
|
Jun. 30, 2013
Employee Stock Option [Member]
|
Jun. 30, 2012
Employee Stock Option [Member]
|
Jun. 30, 2013
Employee Stock Option [Member]
|
Jun. 30, 2012
Employee Stock Option [Member]
|
Jun. 30, 2013
Restricted Stock Units (RSUs) [Member]
|
Jun. 30, 2013
Restricted Stock Units (RSUs) [Member]
|
Jun. 30, 2013
Restricted Stock Units RSU and Stock Options [Member]
|
Dec. 31, 2012
Restricted Stock Units RSU and Stock Options [Member]
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Jun. 30, 2013
Sirius XM Savings Plan [Member]
|
Jun. 30, 2012
Sirius XM Savings Plan [Member]
|
Jun. 30, 2013
Sirius XM Savings Plan [Member]
|
Jun. 30, 2012
Sirius XM Savings Plan [Member]
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| Benefits Plans (Textual) [Abstract] | ||||||||||||||||||||
| Share-based compensation expense | $ 15,494 | $ 13,918 | $ 30,012 | $ 28,869 | $ 15,283 | $ 13,047 | $ 29,801 | $ 26,690 | $ 211 | $ 211 | $ 871 | $ 2,179 | ||||||||
| Stock-based awards expiration term | 10 years | |||||||||||||||||||
| Restricted stock conversion to common stock | 1 | |||||||||||||||||||
| Common stock available for future grants | 133,184,000 | 133,184,000 | ||||||||||||||||||
| Number of other share-based benefit plans | 4 | |||||||||||||||||||
| Granted, options (in shares) | 0 | 0 | 0 | 0 | 10,718,000 | |||||||||||||||
| Restricted stock units granted in period to third parties (in shares) | 0 | 0 | 0 | 0 | 985,000 | |||||||||||||||
| Weighted average grant date fair value of options granted (in dollars per share) | $ 1.34 | $ 0.94 | ||||||||||||||||||
| Total intrinsic value of stock options exercised | 33,660 | 107,560 | ||||||||||||||||||
| Weighted average grant date fair value of restricted stock units granted (in dollars per share) | $ 3.30 | |||||||||||||||||||
| Total intrinsic value of restricted stock units that vested | 605 | |||||||||||||||||||
| Total unrecognized compensation costs related to unvested share based payment awards for restricted stock units, net of estimated forfeitures | 116,474 | 129,010 | ||||||||||||||||||
| Weighted average expected period for recognition of compensation expenses | 2 years 6 months | |||||||||||||||||||
| Minimum of employee contributions of pre-tax eligible earnings to Company 401(k) Savings Plan | 1.00% | 1.00% | ||||||||||||||||||
| Maximum of employee contributions of pre-tax eligible earnings to Company 401(k) Savings Plan | 50.00% | 50.00% | ||||||||||||||||||
| Percent of Company match of employee's voluntary contributions | 50.00% | |||||||||||||||||||
| Percent of employee's pre-tax salary | 6.00% | |||||||||||||||||||
| Contributions by employer | $ 968 | $ 2,387 | ||||||||||||||||||
| Vesting percentage of employer contributions for each year of employment | 33.33% | 33.33% | ||||||||||||||||||
| Savings plan, fully vested period | 3 years | |||||||||||||||||||