Organization - Additional Information $ in Thousands, Person in Millions	3 Months Ended		9 Months Ended
	Jan. 30, 2021 USD ($) Store shares	Jan. 25, 2020 USD ($)	Jan. 30, 2021 USD ($) segment Store Person	Jan. 25, 2020 USD ($)
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of Stores | Store	1,441		1,441
Number of students covered to build relationships and derive sales | Person			6
Number of Reportable Segments | segment			3
Other Nonrecurring Expense	$ 27,630	$ 0	$ 27,630	$ 433
Proceeds from Issuance of Common Stock	$ 15,000
Stock Issued During Period, Shares, Treasury Stock Reissued | shares	2,307,692