Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Series C Preferred Stock [Member] Preferred Stock [Member]	Series C Preferred Stock [Member] Treasury Stock [Member]
Balance (in shares) at Apr. 27, 2019		50,678					150	150
Balance at Apr. 27, 2019		$ 507	$ 37,065	$ 313,430	$ (1,543)		$ 150	$ (5,100)
Stock options exercised			7
Balance (in shares) at Jul. 27, 2019		50,678				4,033
Balance at Jul. 27, 2019	$ 366,236	$ 507	37,134	347,972	(1,527)	$ (12,900)
Stock-based compensation			62
Net income	34,542			34,542
Cash flow hedges, net of tax	16				16
Balance (in shares) at May. 02, 2020		50,803					150	150
Balance at May. 02, 2020	452,337	$ 508	37,930	443,402	(5,420)		$ 150	$ (5,100)
Stock options exercised		$ 14	139
Balance (in shares) at Aug. 01, 2020		50,817				4,187
Balance at Aug. 01, 2020	508,940	$ 508	38,110	494,566	(161)	$ (19,133)
Stock-based compensation			$ 41
Net income	51,164			$ 51,164
Cash flow hedges, net of tax	$ 5,259				$ 5,259