Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Preferred Stock [Member] Series C Preferred Stock [Member]	Common Stock Outstanding [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Treasury Stock [Member] Series C Preferred Stock [Member]	Treasury Stock, Common [Member]	Total
Balance at Apr. 28, 2018	$ 150	$ 507	$ 36,358	$ 4,601	$ 307,824	$ (5,100)	$ (12,900)
Stock options exercised			403
Stock-based compensation			179
Balance at Jan. 26, 2019			36,940	(1,397)	287,294		(12,900)	$ 305,494
Cash flow hedges, net of tax				(5,998)				(5,998)
Net income					114,717			114,717
Common stock cash dividend					(135,247)
Repurchase of common shares							$ 0
Balance (in shares) at Apr. 28, 2018		46,618,240,000				150,000,000	4,302,544,000
Stock option exercises (in shares)		24,300,000
Repurchase of common shares (in shares)		0					0
Balance (in shares) at Jan. 26, 2019		46,642,540,000					4,032,544,000
Repurchase of common shares (in shares)		(0)					0
Balance at Oct. 27, 2018	150	$ 507	36,800	(155)	397,732	$ (5,100)	$ (12,900)
Stock options exercised			78
Stock-based compensation			62
Balance at Jan. 26, 2019			36,940	(1,397)	287,294		(12,900)	305,494
Cash flow hedges, net of tax				(1,242)				(1,242)
Net income					24,809			24,809
Common stock cash dividend					(135,247)
Repurchase of common shares							$ 0
Balance (in shares) at Oct. 27, 2018		46,636,740,000				150,000,000	4,032,544,000
Stock option exercises (in shares)		5,800,000
Repurchase of common shares (in shares)		0					0
Balance (in shares) at Jan. 26, 2019		46,642,540,000					4,032,544,000
Repurchase of common shares (in shares)		(0)					0
Balance at Apr. 27, 2019	150	$ 507	37,065	(1,543)	313,430	$ (5,100)	$ (12,900)	331,609
Stock options exercised			406
Stock-based compensation			189
Balance at Jan. 25, 2020			37,660	(985)	407,189		(17,219)	422,202
Cash flow hedges, net of tax				558				558
Net income					93,759			$ 93,759
Common stock cash dividend					0
Repurchase of common shares							$ (4,319)
Balance (in shares) at Apr. 27, 2019		46,645,540,000				150,000,000	4,032,544,000
Stock option exercises (in shares)		76,800,000						76,800
Repurchase of common shares (in shares)		(106,861,000)					(106,861,000)
Balance (in shares) at Jan. 25, 2020		46,615,479,000					4,139,405,000
Repurchase of common shares (in shares)		106,861,000					106,861,000
Balance at Oct. 26, 2019	$ 150	$ 507	37,338	(1,108)	380,626	$ (5,100)	$ (12,900)
Stock options exercised			259
Stock-based compensation			63
Balance at Jan. 25, 2020			$ 37,660	(985)	407,189		(17,219)	$ 422,202
Cash flow hedges, net of tax				$ 123				123
Net income					26,563			$ 26,563
Common stock cash dividend					$ 0
Repurchase of common shares							$ (4,319)
Balance (in shares) at Oct. 26, 2019		46,662,040,000				150,000,000	4,032,544,000
Stock option exercises (in shares)		60,300,000
Repurchase of common shares (in shares)		(106,861,000)					(106,861,000)
Balance (in shares) at Jan. 25, 2020		46,615,479,000					4,139,405,000
Repurchase of common shares (in shares)		106,861,000					106,861,000