Rhapsody Joint Venture (Summarized Financial Operating Information for Rhapsody) (Detail) - Rhapsody America LLC - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Schedule of Equity Method Investments [Line Items]
Net revenue	$ 53,456	$ 50,063	$ 105,963	$ 96,387
Gross profit	6,850	7,753	14,093	15,843
Net loss	$ (7,905)	$ (12,061)	$ (13,053)	$ (20,985)