Goodwill and Other Intangibles - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Feb. 01, 2012 HIT Entertainment	Dec. 31, 2013 HIT Entertainment	Dec. 31, 2012 HIT Entertainment
Business Acquisition [Line Items]
Percentage of ownership acquired			100.00%
Total cash consideration paid, including payment for acquired cash, subject to customary adjustments			$ 713,500,000
Identifiable intangible assets			510,700,000
Net liabilities assumed			49,400,000
Goodwill relating to acquisition		252,246,000	252,246,000
Integration costs for acquisition				5,000,000	18,000,000
Transaction costs for acquisition					6,000,000
Nonamortizable identifiable intangible assets acquired			495,000,000
Amortizable identifiable intangible assets acquired			15,700,000
Carrying amount of nonamortizable identifiable intangible asset prior to impairment	113,000,000
Remaining fair value of intangible asset	99,000,000
Impairment charge	$ 14,000,000