CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Unearned ESOP Shares
Beginning Balance at Apr. 25, 2015	$ 1,514,123	$ 1,033	$ 21,026	$ (60,346)	$ 1,630,148	$ (77,738)
Beginning balance (in shares) at Apr. 25, 2015		103,278
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Foreign currency translation	(9,552)			(9,552)
Cash flow hedges	1,934			1,934
Net income	187,184				187,184
Dividends declared	(88,218)				(88,218)
Common stock issued and related tax benefits	12,877	$ 2	12,875
Common stock issued and related tax benefits (in shares)		208
Repurchases of common stock	(200,000)	$ (44)	0		(199,956)
Repurchase of common stock (in shares)		(4,379)
Stock based compensation	14,576		14,576
ESOP activity	8,822					8,822
Ending Balance at Apr. 30, 2016	1,441,746	$ 991	48,477	(67,964)	1,529,158	(68,916)
Ending balance (in shares) at Apr. 30, 2016		99,107
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Foreign currency translation	(26,450)			(26,450)
Cash flow hedges	1,745			1,745
Net income	170,893				170,893
Dividends declared	(93,461)				(93,461)
Common stock issued and related tax benefits	6,789	$ 3	6,786
Common stock issued and related tax benefits (in shares)		282
Repurchases of common stock	(125,384)	$ (28)			(125,356)
Repurchase of common stock (in shares)		(2,855)
Stock based compensation	17,710		17,710
ESOP activity	845					845
Ending Balance at Apr. 29, 2017	$ 1,394,433	$ 966	72,973	(92,669)	1,481,234	(68,071)
Ending balance (in shares) at Apr. 29, 2017	97	96,534
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Foreign currency translation	$ 15,824			15,824
Cash flow hedges	1,871			1,871
Net income	200,974				200,974
Dividends declared	(96,964)				(96,964)
Common stock issued and related tax benefits	12,407	$ 4	12,403
Common stock issued and related tax benefits (in shares)		369
Repurchases of common stock	(87,500)	$ (22)			(87,478)
Repurchase of common stock (in shares)		(2,147)
Stock based compensation	18,400		18,400
ESOP activity	2,345					2,345
Ending Balance at Apr. 28, 2018	$ 1,461,790	$ 948	$ 103,776	$ (74,974)	$ 1,497,766	$ (65,726)
Ending balance (in shares) at Apr. 28, 2018	94,756	94,756