Goodwill

v2.4.0.6

Goodwill	3 Months Ended
	Mar. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill Goodwill represents the excess of the purchase price over the estimated fair value of net tangible and identifiable intangible assets acquired in business combinations. Our annual impairment assessment is performed as of the fourth quarter of each year, and an assessment is performed at other times if an event occurs or circumstances change that would more likely than not reduce the fair value of the asset below its carrying value. At the date of our annual assessment for 2012 and 2011, the fair value of our single reporting unit substantially exceeded its carrying value and therefore was not at risk of failing step one of ASC 350-20, Goodwill. As of March 31, 2013, there were no indicators of impairment, and no impairment loss was recorded for goodwill during the three months ended March 31, 2013 and 2012. As of March 31, 2013, the cumulative balance of goodwill impairment that had been recorded since the merger of our wholly owned subsidiary, Vernon Merger Corporation, with and into XM Satellite Radio Holdings Inc. in July 2008 (the "Merger") was $4,766,190, which was recognized during the year ended December 31, 2008.