CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND OTHER COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Income Statement [Abstract]
Net sales	$ 1,418,241	$ 1,389,210	$ 2,750,677	$ 2,532,080
Cost of sales	1,099,281	1,058,311	2,114,539	1,912,937
Gross profit	318,960	330,899	636,138	619,143
Operating expenses	239,157	247,436	490,919	473,503
Operating income from continuing operations	79,803	83,463	145,219	145,640
Other income (expense):
Other income, net	1,622	954	3,986	1,624
Interest expense	(10,097)	(17,154)	(20,259)	(29,297)
Income from continuing operations before taxes	71,328	67,263	128,946	117,967
Income tax expense	25,572	24,700	44,284	55,093
Net income from continuing operations	45,756	42,563	84,662	62,874
Net income (loss) from discontinued operations	0	(7,142)	0	2,250
Net income	$ 45,756	$ 35,421	$ 84,662	$ 65,124
Basic earnings (loss) per share:
Continuing operations (in USD per share)	$ 0.48	$ 0.43	$ 0.89	$ 0.64
Discontinued operations (in USD per share)	0.00	(0.07)	0.00	0.02
Net basic earnings per share (in USD per share)	0.48	0.36	0.89	0.66
Diluted earnings (loss) per share:
Continuing operations (in USD per share)	0.48	0.43	0.88	0.63
Discontinued operations (in USD per share)	0.00	(0.07)	0.00	0.02
Net diluted earnings per share (in USD per share)	$ 0.48	$ 0.36	$ 0.88	$ 0.65
Weighted average shares:
Basic (in shares)	95,290	98,525	95,510	98,981
Diluted (in shares)	95,904	99,185	96,138	99,674
Dividends declared per common share (in USD per share)	$ 0.24	$ 0.22	$ 0.48	$ 0.44
Comprehensive income
Net income	$ 45,756	$ 35,421	$ 84,662	$ 65,124
Foreign currency translation gain (loss)	(14,001)	6,941	(34,258)	(4,334)
Cash flow hedges, net of tax	437	437	870	1,054
Comprehensive income	$ 32,192	$ 42,799	$ 51,274	$ 61,844