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 Jan. 27, 2018	$ 150	$ 506	$ 36,156		$ 3,311	$ (5,100)	$ (12,900)	$ 293,505
Balance at Apr. 29, 2017			35,638	$ 227,928	(604)
Stock options exercised			399
Stock-based compensation			119
Net income				113,332				113,332
Common stock cash dividend				(69,878)
End of period				271,382
Cash flow hedges, net of tax					3,915			3,915
Balance at Jan. 26, 2019	$ 150	$ 507	36,940		(1,397)	$ (5,100)	$ (12,900)	305,494
Balance at Apr. 28, 2018			36,358	307,824	4,601			331,440
Stock options exercised			403
Stock-based compensation			$ 179
Net income				114,717				114,717
Common stock cash dividend				(135,247)
End of period				$ 287,294
Cash flow hedges, net of tax					$ (5,998)			$ (5,998)