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Revenue Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
Revenue Revenue (Details) - USD ($) $ in Thousands	Apr. 27, 2024	Jan. 27, 2024	Oct. 28, 2023	Jul. 29, 2023	Apr. 29, 2023	Jan. 28, 2023	Oct. 29, 2022	Jul. 30, 2022	Apr. 27, 2024	Apr. 29, 2023	Apr. 30, 2022
Revenues	$ 235,922	$ 456,673	$ 610,379	$ 264,161	$ 241,847	$ 438,054	$ 608,633	$ 254,674	$ 1,567,135	$ 1,543,208
Rental income									136,679	136,553
Contract with Customer, Asset, after Allowance for Credit Loss	0				0				0	0
Deferred Revenue	14,892				15,356				14,892	15,356	$ 16,475
Deferred Revenue, Current	11,310				11,218				11,310	11,218
Deferred Revenue, Additions									176,319	184,163
Product sales and other									1,430,456	1,406,655
Deferred Revenue, Revenue Recognized									(176,783)	(185,282)
Deferred Revenue, Noncurrent	$ 3,582				$ 4,138				3,582	4,138
Intersegment Eliminations [Member]
Revenues									(60,413)	(54,884)
Retail Segment [Member]
Revenues									1,514,917	1,491,726
Retail Segment [Member] \| Service and Other
Revenues									42,191	41,759
Retail Segment [Member] \| Course Materials Product
Revenues									971,950	927,915
Retail Segment [Member] \| General Merchandise Product
Revenues									364,097	385,499
Wholesale [Member]
Revenues									112,631	106,366
Transferred at Point in Time [Member] \| Retail Segment [Member]
Product sales and other									$ 1,378,238	1,355,173
Transferred over Time [Member] \| Retail Segment [Member]
Rental income										$ 136,553