Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 25, 2020	Apr. 27, 2019	Apr. 28, 2018
Income Tax Disclosure [Abstract]
Effective income tax rate	21.00%
Blended tax rate		30.50%
Tax Cuts And Jobs Act Of 2017, provisional income tax benefit			$ (76,648)
Tax Cuts and Jobs Act, Provisional tax benefit on deferred tax liabilities			81,871
Tax Cuts And Jobs Act of 2017, withholding tax on distributions			1,217
Tax Cuts and Jobs Act, remeasurement benefit		$ (2,355)
Tax Cuts And Jobs Act Of 2017, transition tax on unremitted foreign earnings		331	(4,006)
Tax Credit Carryforward [Line Items]
Foreign net operating loss carryforwards	$ 14,886
Gross unrecognized tax benefits	11,740	13,035	$ 14,227
Deferred tax assets, deductibility of gross liabilities	2,113	2,225
Interest and penalties	1,968	$ 1,926
Increase in interest and penalties expense	$ 394
Foreign Tax Credit Carryforward
Tax Credit Carryforward [Line Items]
Expiration period	6 years