Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	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]
Balance at Apr. 30, 2016				$ 34,570	$ 190,733	$ (1,807)
Stock options exercised				29
Stock-based compensation				49
Stock-based tax benefits				28
Net income	$ 28,995				28,995
Common stock cash dividend
Cash flow hedges	415					415
Balance at Jul. 30, 2016	235,668	$ 150	$ 506	34,676	219,728	(1,392)	$ (5,100)	$ (12,900)
Balance at Apr. 30, 2017				35,638	227,928	(604)
Stock options exercised				46
Stock-based compensation				41
Stock-based tax benefits
Net income	38,272				38,272
Common stock cash dividend					(69,878)
Cash flow hedges	(628)					(628)
Balance at Jul. 29, 2017	$ 213,471	$ 150	$ 506	$ 35,725	$ 196,322	$ (1,232)	$ (5,100)	$ (12,900)