Amortizable Intangible Assets and Unamortizable Intangible Assets (Detail) - USD ($) $ in Thousands		9 Months Ended		12 Months Ended
		Jan. 26, 2019	Jan. 27, 2018	Jan. 26, 2019	Jan. 26, 2019	Oct. 27, 2018	Apr. 28, 2018	Jan. 27, 2018
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount					$ 6,611			$ 17,234
Accumulated Amortization					(6,579)			(16,771)
Total					32			463
Beginning Balance	[1]			$ 309,294
Impairment	[1]			(5,594)
Ending Balance	[1]	$ 303,700	$ 309,294	303,700
Total amortizable and unamortizable, intangible assets					303,732	$ 303,732	$ 309,649	309,757
Unamortizable intangible assets	[1]	303,700	309,294	303,700	303,700			309,294
Trade name
Intangible Assets by Major Class [Line Items]
Beginning Balance	[1]			293,400
Ending Balance	[1]	293,400	293,400	293,400
Unamortizable intangible assets	[1]	293,400	293,400	293,400	293,400			293,400
Publishing contracts
Intangible Assets by Major Class [Line Items]
Beginning Balance	[1]			15,894
Impairment	[1]			(5,594)
Ending Balance	[1]	10,300	15,894	10,300
Unamortizable intangible assets	[1]	$ 10,300	$ 15,894	$ 10,300	10,300			15,894
Technology
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount								10,710
Accumulated Amortization								(10,303)
Total								407
Technology | Minimum
Intangible Assets by Major Class [Line Items]
Useful Life			5 years
Technology | Maximum
Intangible Assets by Major Class [Line Items]
Useful Life			10 years
Other
Intangible Assets by Major Class [Line Items]
Gross Carrying Amount					6,611			6,524
Accumulated Amortization					(6,579)			(6,468)
Total					$ 32			$ 56
Other | Minimum
Intangible Assets by Major Class [Line Items]
Useful Life		3 years	3 years
Other | Maximum
Intangible Assets by Major Class [Line Items]
Useful Life		10 years	10 years

[1] See Note 3 to these Consolidated Financial Statements.