CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (USD $) In Thousands, unless otherwise specified	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest	Total
Balance at Apr. 27, 2013	$ 52,392	$ 241,888	$ 226,044	$ (35,496)	$ 7,140	$ 491,968
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			55,056		1,324	56,380
Other comprehensive income (loss)				4,116	(730)	3,386
Stock issued for stock and employee benefit plans, net of cancellations	937	2,395	(4,509)			(1,177)
Purchases of common stock	(1,348)	(3,056)	(27,693)			(32,097)
Stock option and restricted stock expense		8,739				8,739
Excess tax benefit from exercise of options		12,935				12,935
Dividends paid			(10,514)			(10,514)
Change in noncontrolling interests					98	98
Balance at Apr. 26, 2014	51,981	262,901	238,384	(31,380)	7,832	529,718
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			32,610		409	33,019
Other comprehensive income (loss)				836	(22)	814
Stock issued for stock and employee benefit plans, net of cancellations	801	(1,113)	(10,684)			(10,996)
Purchases of common stock	(890)	(128)	(18,636)			(19,654)
Stock option and restricted stock expense		5,047				5,047
Excess tax benefit from exercise of options		252				252
Dividends paid			(6,274)			(6,274)
Balance at Oct. 25, 2014	$ 51,892	$ 266,959	$ 235,400	$ (30,544)	$ 8,219	$ 531,926