Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 24, 2021	Apr. 25, 2020	Apr. 27, 2019
Federal
Current	$ 18,327	$ 25,026	$ 17,629
Deferred	6,771	1,440	(2,649)
State
Current	6,475	7,901	6,199
Deferred	2,339	(1,409)	(933)
Foreign
Current	4,451	3,025	4,919
Deferred	21	206	21
Total income tax expense	$ 38,384	$ 36,189	$ 25,186