Related Party Transactions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
LoEn Entertainment, Inc
Related Party Transaction [Line Items]
Revenue from related party	$ 6.8	$ 4.0	$ 17.3	$ 12.0
Percentage of acquire outstanding shares of LoEn Entertainment, Inc.	9.00%		9.00%
Accounts receivable recorded	3.4		3.4
Rhapsody America LLC
Related Party Transaction [Line Items]
Revenue from related party	$ 0.2	$ 0.2	$ 0.6	$ 0.7