Changes in Intangible Assets Other Than Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013 Adjusted acquired intangible assets
Indefinite-lived Intangible Assets [Roll Forward]
Indefinite-Lived Intangible Assets, Beginning Balance	$ 1,596,337	$ 1,602,373
Purchase price allocation adjustments	963
Indefinite- Lived, Acquisition	0	61,730
Indefinite-Lived, Disposition	(50)	(67,766)
Indefinite-Lived Intangible Assets, Ending Balance	1,597,250
Definite-Lived Intangible Assets, Beginning Balance	315,490	258,303	315,490
Definite-Lived, Purchase price allocation adjustments	0
Definite-Lived, Acquisition	0	152,522
Definite-Lived, Disposition		(8,627)
Definite-Lived Intangible Assets, Ending Balance	295,518		315,490
Intangible Assets Total, Beginning Balance	1,911,827	1,860,676
Total Acquisition	0	214,252
Total, Disposition	(50)	(76,393)
Amortization	(19,972)	(86,708)
Intangible Assets Total, Ending Balance	$ 1,892,768