CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - USD ($) $ in Thousands	Common Shares	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Non-Controlling Interests	Total
Balance at Apr. 25, 2015	$ 50,747	$ 270,032	$ 235,506	$ (32,139)	$ 8,954	$ 533,100
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			79,252		1,711	80,963
Other comprehensive income (loss)				(1,861)	(595)	(2,456)
Stock issued for stock and employee benefit plans, net of cancellations and withholding tax	243	97	(2,068)			(1,728)
Purchases of common stock	(1,659)	(346)	(42,077)			(44,082)
Stock option and restricted stock expense		8,292				8,292
Tax benefit from exercise of options		1,264				1,264
Dividends paid			(18,141)			(18,141)
Balance at Apr. 30, 2016	49,331	279,339	252,472	(34,000)	10,070	557,212
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			57,925		830	58,755
Other comprehensive income (loss)				215	(159)	56
Stock issued for stock and employee benefit plans, net of cancellations and withholding tax	495	2,938	(1,693)			1,740
Purchases of common stock	(966)	(3,240)	(20,856)			(25,062)
Stock option and restricted stock expense		7,571				7,571
Tax benefit from exercise of options		1,924				1,924
Dividends paid			(15,270)			(15,270)
Balance at Jan. 28, 2017	$ 48,860	$ 288,532	$ 272,578	$ (33,785)	$ 10,741	$ 586,926