Derivative Financial Instruments - Effect of Interest Rate Contracts and Interest Rate Swaps on Consolidated Statements of Income and Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 24, 2021	Apr. 25, 2020	Apr. 27, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on interest rate swap agreements	$ 1,151	$ (18,712)	$ (2,903)
Interest rate contracts | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) reclassified form Accumulated Other Comprehensive Loss	(1,363)	(10,458)	(2,908)
Interest rate contracts | Other income, net
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on interest rate swap agreements	$ 1,151	$ (18,712)	$ (2,903)