Related Party Transactions (Additional Information) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Dec. 31, 2008
LoEn Entertainment, Inc
Related Party Transaction [Line Items]
Revenue from related party	$ 26.4	$ 18.1	$ 20.3
Percentage of acquire outstanding shares of LoEn Entertainment, Inc.				9.00%	11.00%
Rhapsody America LLC
Related Party Transaction [Line Items]
Revenue from related party	$ 0.5	$ 0.8	$ 2.2