CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 25, 2014	Oct. 26, 2013	Oct. 25, 2014	Oct. 26, 2013
Income Statement [Abstract]
Net sales	$ 1,103,325	$ 998,834	$ 2,162,854	$ 1,878,959
Cost of sales	797,503	709,403	1,560,807	1,308,010
Gross profit	305,822	289,431	602,047	570,949
Operating expenses	214,601	214,208	426,072	414,445
Operating income	91,221	75,223	175,975	156,504
Other income and expense:
Other income, net	760	1,245	2,262	688
Interest expense	(8,544)	(8,777)	(17,312)	(17,344)
Income before taxes	83,437	67,691	160,925	139,848
Income taxes	29,659	25,663	56,858	51,928
Net income	53,778	42,028	104,067	87,920
Earnings per share:
Basic	$ 0.54	$ 0.42	$ 1.05	$ 0.87
Diluted	$ 0.54	$ 0.41	$ 1.04	$ 0.86
Weighted average common shares:
Basic	98,802	101,069	99,066	101,048
Diluted	99,376	101,968	99,779	101,944
Dividends declared per common share	$ 0.20	$ 0.16	$ 0.40	$ 0.32
Comprehensive income
Net income	53,778	42,028	104,067	87,920
Foreign currency translation (loss) gain	(36,816)	14,699	(26,506)	6,394
Cash flow hedge loss	(3,867)	(48)	(6,176)	(97)
Comprehensive income	$ 13,095	$ 56,679	$ 71,385	$ 94,217