Rhapsody Joint Venture (Summarized Financial Operating Information for Rhapsody) (Detail) (Rhapsody America LLC, USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Rhapsody America LLC
Schedule of Equity Method Investments [Line Items]
Net revenue	$ 44,148	$ 35,190	$ 128,578	$ 103,831
Gross profit	7,739	7,800	24,730	24,412
Net loss	$ (7,965)	$ (5,621)	$ (14,312)	$ (14,812)