Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Preferred Stock [Member] Series C Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Treasury Stock, Preferred [Member] Series C Preferred Stock [Member]	Treasury Stock, Common [Member]	Total
Balance at Oct. 28, 2017	$ 150	$ 506	$ 36,000		$ 2,015	$ (5,100)	$ (12,900)	$ 250,973
Balance at Apr. 29, 2017			35,638	$ 227,928	(604)
Stock options exercised			282
Stock-based compensation			80
Stock-based tax benefits
Net income								72,252
Cash flow hedges, net of tax					2,619			2,619
Balance at Oct. 27, 2018	150	507	36,800		(155)	(5,100)	(12,900)	417,034
Balance at Apr. 29, 2017			35,638	227,928	(604)
Net income				72,252
Common stock cash dividend				(69,878)
End of period				230,302
Balance at Oct. 27, 2018	$ 150	$ 507	36,800		(155)	$ (5,100)	$ (12,900)	417,034
Balance at Apr. 28, 2018			36,358	307,824	4,601			331,440
Stock options exercised			325
Stock-based compensation			$ 117
Stock-based tax benefits
Net income				89,908				89,908
Common stock cash dividend
End of period				$ 397,732
Cash flow hedges, net of tax					$ (4,756)			$ (4,756)