Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Series C Preferred Stock [Member] Preferred Stock [Member]	Series C Preferred Stock [Member] Treasury Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Total
Balance (in shares) at Apr. 27, 2019	150,000	150,000	50,678,000
Balance at Apr. 27, 2019	$ 150	$ (5,100)	$ 507	$ 37,065	$ 313,430	$ (1,543)
Stock options exercised (in shares)			17,000
Stock options exercised				147
Stock-based compensation				126
Net income					67,196			$ 67,196
Cash flow hedges, net of tax						435		435
Balance (in shares) at Oct. 26, 2019			50,695,000				4,033,000
Balance at Oct. 26, 2019			$ 507	37,338	380,626	(1,108)	$ (12,900)	399,513
Balance (in shares) at Jul. 27, 2019	150,000	150,000	50,678,000
Balance at Jul. 27, 2019	$ 150	$ (5,100)	$ 507	37,134	347,972	(1,527)
Stock options exercised (in shares)			17,000
Stock options exercised				140
Stock-based compensation				64
Net income					32,654			32,654
Cash flow hedges, net of tax						419		419
Balance (in shares) at Oct. 26, 2019			50,695,000				4,033,000
Balance at Oct. 26, 2019			$ 507	37,338	380,626	(1,108)	$ (12,900)	399,513
Balance (in shares) at May. 02, 2020	150,000	150,000	50,803,000
Balance at May. 02, 2020	$ 150	$ (5,100)	$ 508	37,930	443,402	(5,420)		$ 452,337
Stock options exercised (in shares)			29,000					29,000
Stock options exercised				403
Stock-based compensation				119
Net income					98,328			$ 98,328
Cash flow hedges, net of tax						6,889		6,889
Balance (in shares) at Oct. 31, 2020			50,832,000				4,187,000
Balance at Oct. 31, 2020			$ 0	38,452	541,730	1,469	$ (19,133)	558,076
Balance (in shares) at Aug. 01, 2020	150,000	150,000	50,817,000
Balance at Aug. 01, 2020	$ 150	$ (5,100)	$ 508	38,110	494,566	(161)
Stock options exercised (in shares)			15,000
Stock options exercised				251
Stock-based compensation				91
Net income					47,164			47,164
Cash flow hedges, net of tax						1,630		1,630
Balance (in shares) at Oct. 31, 2020			50,832,000				4,187,000
Balance at Oct. 31, 2020			$ 0	$ 38,452	$ 541,730	$ 1,469	$ (19,133)	$ 558,076