Rhapsody Joint Venture (Summarized Financial Operating Information for Rhapsody) (Detail) - Rhapsody America LLC - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Schedule of Equity Method Investments [Line Items]
Net revenue	$ 50,063	$ 42,427	$ 96,387	$ 84,430
Gross profit	7,753	7,870	15,843	16,991
Net loss	$ (12,061)	$ (4,717)	$ (20,985)	$ (6,347)