Goodwill and Other Intangible Assets - Balances of Other Intangible Assets Excluding Goodwill (Detail) - USD ($) $ in Thousands	Aug. 01, 2015	Apr. 25, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Copyrights, trade names and trademarks	$ 29,900	$ 17,600
Distribution agreement, customer lists and other	643,314	221,359
Less: Accumulated amortization	(121,877)	(113,934)
Net amortized intangible assets	521,437	107,425
Total identifiable intangible assets, net	$ 551,337	$ 125,025