Amortizable Intangible Assets and Unamortizable Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jan. 31, 2015	May 03, 2014	Jan. 25, 2014
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	297,392
Accumulated Amortization	(93,476)
Total	203,916
Unamortizable intangible assets	313,134
Total amortizable and unamortizable, intangible assets	517,050	528,576	532,761
Trade name
Intangible Assets by Major Class [Line Items]
Unamortizable intangible assets	293,400
Publishing contracts
Intangible Assets by Major Class [Line Items]
Unamortizable intangible assets	19,734
Customer relationships
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	271,938
Accumulated Amortization	(71,337)
Total	200,601
Customer relationships | Minimum
Intangible Assets by Major Class [Line Items]
Useful Life	4 years
Customer relationships | Maximum
Intangible Assets by Major Class [Line Items]
Useful Life	25 years
Technology
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	10,710
Accumulated Amortization	(8,402)
Total	2,308
Technology | Minimum
Intangible Assets by Major Class [Line Items]
Useful Life	4 years
Technology | Maximum
Intangible Assets by Major Class [Line Items]
Useful Life	10 years
Distribution contracts
Intangible Assets by Major Class [Line Items]
Useful Life	10 years
Gross Carrying Amount	8,325
Accumulated Amortization	(7,534)
Total	791
Other
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount	6,419
Accumulated Amortization	(6,203)
Total	216
Other | Minimum
Intangible Assets by Major Class [Line Items]
Useful Life	2 years
Other | Maximum
Intangible Assets by Major Class [Line Items]
Useful Life	10 years